Claims
- 1. A process for producing a p-phenylene sulfide/m-phenylene sulfide block copolymer which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR41## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalozene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR42## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 200.degree. to 350.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 2. The process according to claim 1 wherein the dihaloaromatic compound consisting essentially of a m-dihalobenzene is used in the form of an unreacted liquid mixture (D) thereof with the aprotic polar organic solvent containing the alkali metal sulfide.
- 3. The process according to claim 1 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 4. The process according to claim 1 wherein the alkali metal sulfide is sodium sulfide.
- 5. The process according to claim 1 wherein the aprotic polar solvent is an organic amide.
- 6. The process according to claim 5 wherein the amide is N-methylpyrrolidone.
- 7. A para-phenylene sulfide/metaphenylene sulfide block copolymer which is produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR43## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to from a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR44## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 200.degree. to 350.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 8. A molded article produced from a p-phenylene sulfide/m-phenylene sulfide block copolymer which is produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR45## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalozene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR46## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 50 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 9. The article according to claim 8 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 10. The article according to claim 8 wherein the alkali metal sulfide is sodium sulfide.
- 11. The article according to claim 8 wherein the aprotic polar solvent is an organic amide.
- 12. The article according to claim 11 wherein the amide is N-methylpyrrolidone.
- 13. The article according to claim 8 which is a film or fiber.
- 14. The article according to claim 8 which is an injection-molded product, extrusion-molded product or electric wire coating.
- 15. A process for producing a p-phenylene sulfide block/m-phenylene sulfide copolymer comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR47## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR48## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU6## wherein X represents mol fraction of recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 200.degree. to 350.degree. C., and
- (c) a crystalline index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 16. The process according to claim 15 wherein the p-dihalobenzene is used in the form of an unreacted liquid mixture (F) thereof with the aprotic polar organic solvent containing the alkali metal sulfide.
- 17. The process according to claim 15 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 18. The process according to claim 15 wherein the alkali metal sulfide is sodium sulfide.
- 19. The process according to claim 15 wherein the aprotic polar solvent is an organic amide.
- 20. The process according to claim 19 wherein the amide is N-methylpyrrolidone.
- 21. A para-phenylene sulfide/meta-phenylene sulfide block copolymer which is produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR49## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR50## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU7## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 200.degree. to 350.degree. C., and
- (c) a crystalline index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 22. The block copolymer according to claim 21 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 23. The block copolymer according to claim 21 wherein the alkali metal sulfide is sodium sulfide.
- 24. The block copolymer according to claim 21 wherein the aprotic polar solvent is an organic amide.
- 25. The block copolymer according ot claim 24 wherein the amide is N-methylpyrrolidone.
- 26. A molded article produced from a p-phenylene sulfide m-pheylene sulfide block copolymer, which is produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR51## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR52## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU8## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 50 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 27. The article according to claim 26 wherein the p-dihalaobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 28. The article according to claim 26 wherein the alkali metal sulfide is sodium sulfide.
- 29. The article according to claim 26 wherein the aprotic polar solvent is an organic amide.
- 30. The article according to claim 27 wherein the amide is N-methylpyrrolidone.
- 31. The article according to claim 26 which is film or fiber.
- 32. The article according to claim 26 which is an injection-molded product, extrusion-molded product or electric wire coating.
- 33. A process comprising sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler wherein the synthetic resin component comprises mainly a phenylene sulfide block copolymer consisting essentially of recurring units ##STR53## and recurring units ##STR54## in which the former recurring units form blocks, have an average degree of polymerization of 20 to 2,000 bonded in the molecular chain and have a mol fraction in the range of 0.50 to 0.98, said copolymer having a melt viscosity of 10 to 1,500 poise (310.degree. C., shear rate: 200 sec.sup.-1).
- 34. A process for sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler, wherein the synthetic resin is a block copolymer produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR55## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR56## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU9## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-pheylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 1,500 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 35. The process according to claim 34 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 36. The process according to claim 34 wherein the alkali metal sulfide is sodium sulfide.
- 37. The process according to claim 34 wherein the aprotic polar solvent is an organic amide.
- 38. The process according to claim 37 wherein the amide is N-methylpyrrolidone.
- 39. A process for sealing electronic parts with a sealing composition comprising 100 parts by weight of a synthetic resin component and 20 to 300 parts by weight of an inorganic filler, wherein the synthetic resin is a block copolymer produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR57## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR58## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 2,000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 1,500 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 40. The process according to claim 39 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 41. The process according to claim 39 wherein the alkali metal sulfide is sodium sulfide.
- 42. The process according to claim 39 wherein the aprotic polar solvent is an organic amide.
- 43. The process according to claim 42 wherein the amide is N-methylpyrrolidone.
- 44. A composition for sealing electronic parts comprising 100 parts by weight of a synthetic resin component mainly comprising a phenylene sulfide block copolymer and 20 to 300 parts by weight of an inorganic filler, said block copolymer being produced by a process comprising a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR59## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid (C) and heating the mxiture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR60## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 2000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 1500 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 45. The composition for sealing electronic parts according to claim 44 wherein the synthetic resin component is a phenylene sulfide block copolymer mixture comprising up to 40 wt. % of m-phenylene sulfide polymer.
- 46. The composition for sealing electronic parts according to claim 44 wherein the synthetic resin component is a phenylene sulfide block copolymer mixture comprising up to 40 wt. % of p-phenylene sulfide polymer.
- 47. The composition for sealing electronic parts according to claim 44 wherein the inorganic filler is a fibrous filler.
- 48. A composition for sealing electronic parts comprising 100 parts by weight of a synthetic resin component mainly comprising a phenylene sulfide block copolymer and 20 to 300 parts by weight of an inorganic filler, said block copolymer being produced by a process comprising a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid (e) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR61## and a second step of adding a p-dihalobenzene to the reaction liquid (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR62## the reaction in the first step being carrired out until the average degree of polymerization of at least 2 and in the range of ##EQU10## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 10 to 1500 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 49. The composition for sealing electronic parts according to claim 48 wherein the synthetic resin component is a phenylene sulfide block copolymer mixture comprising up to 40 wt. % of m-phenylene sulfide polymer.
- 50. The composition for sealing electronic parts according to claim 48 wherein the synthetic resin component is a phenylene sulfide block copolymer mixture comprising up to 40 wt. % of p-phenylene sulfide polymer.
- 51. The composition for sealing electronic parts according to claim 48 wherein the inorganic filler is a fibrous filler.
- 52. A process comprising modling a p-phenylene sulfide/m-phenylene sulfide block copolymer into an article, said block copolymer being produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a p-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (C) containing a p-phenylene sulfide polymer of recurring units (A) ##STR63## and a second step of adding a dihaloaromatic compound consisting essentially of a m-dihalobenzene to the reaction liquid mixture (C) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of a block consisting essentially of recurring units (A) and a block consisting essentially of recurring units (B) ##STR64## the reaction in the first step being carried out until the degree of polymerization of the recurring units (A) has become 20 to 5,000 of (A) on the average; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 50 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 53. The process according to claim 52 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 54. The process according to claim 52 wherein the alkali metal sulfide is sodium sulfide.
- 55. The process according to claim 52 wherein the aprotic polar solvent is an organic amide.
- 56. The process according to claim 55 wherein the amide is N-methylpyrrolidone.
- 57. The process according to claim 52 in which the article is a film or fiber.
- 58. The process according to claim 52 in which the article is an injection-molded product, extrusion-molded product or electric wire coating.
- 59. A process comprising molding a p-phenylene sulfide/m-phenylene sulfide block copolymer into an article, said block copolymer being produced by a process which comprises a first step of heating an aprotic polar organic solvent containing a dihaloaromatic compound consisting essentially of a m-dihalobenzene and an alkali metal sulfide to form a reaction liquid mixture (E) containing a m-phenylene sulfide polymer consisting essentially of recurring units (B) ##STR65## and a second step of adding a p-dihalobenzene to the reaction liquid mixture (E) and heating the mixture in the presence of an alkali metal sulfide and an aprotic polar organic solvent to form a block copolymer consisting essentially of the recurring units (B) and recurring units (A) ##STR66## the reaction in the first step being carried out until the average degree of polymerization of at least 2 and in the range of ##EQU11## wherein X represents a mol fraction of the recurring units (A) in the resulting block copolymer which is in the range of 0.50 to 0.98 has been obtained; the reaction in the second step being carried out until the mol fraction (X) of the recurring units (A) in the resulting block copolymer has become 0.50 to 0.98; and the reactions in these steps being carried out so that the resulting p-phenylene sulfide block copolymer will have a melt viscosity (.eta.*) measured under conditions of 310.degree. C./200 sec.sup.-1 of 50 to 100,000 poise and have:
- (a) a glass transition temperature (Tg) of 20.degree. to 80.degree. C.,
- (b) a crystalline melting point (Tm) of 250.degree. to 285.degree. C., and
- (c) a crystallization index (Ci) of 15 to 45, this value being that of the heat-treated, but not stretch-oriented copolymer.
- 60. The process according to claim 59 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 61. The process according to claim 59 wherein the alkali metal sulfide is sodium sulfide.
- 62. The process according to claim 59 wherein the aprotic polar solvent is an organic amide.
- 63. The process according to claim 62 wherein the amide is N-methylpyrrolidone.
- 64. The process according to claim 59 in which the article is a film or fiber.
- 65. The process according ot claim 59 in which the article is an injection-molded product, extrusion-molded product or electric wire coating.
- 66. The block copolymer according to claim 7 wherein the p-dihalobenzene is p-dichlorobenzene and the m-dihalobenzene is m-dichlorobenzene.
- 67. The block copolymer according to claim 7 wherein the alkali metal sulfide is sodium sulfide.
- 68. The block copolymer according to claim 7 wherein the aprotic polar organic solvent is an organic amide.
- 69. The block copolymer according to claim 68 wherein the amide is N-methylpyrrolidone.
Priority Claims (3)
Number |
Date |
Country |
Kind |
59-134633 |
Jun 1984 |
JPX |
|
59-178016 |
Aug 1984 |
JPX |
|
59-178017 |
Aug 1984 |
JPX |
|
Parent Case Info
This application is a continuation-in-part, of now abandoned application Ser. No. 748,464, filed June 25, 1985.
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3869434 |
Campbell et al. |
Nov 1973 |
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3966688 |
Campbell |
Jun 1976 |
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4370292 |
Yanase et al. |
Jan 1983 |
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4659789 |
Katto et al. |
Apr 1987 |
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Foreign Referenced Citations (3)
Number |
Date |
Country |
0067752 |
Apr 1983 |
JPX |
0011357 |
Jan 1984 |
JPX |
2093468 |
Sep 1982 |
GBX |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
748464 |
Jun 1985 |
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