Number | Date | Country | Kind |
---|---|---|---|
4221712 | Jul 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4012572 | Dean et al. | Mar 1977 | |
4246374 | Konchik | Jan 1981 | |
4252701 | Miyaguchi et al. | Feb 1981 | |
4495339 | Lauver | Jan 1985 |
Number | Date | Country |
---|---|---|
440583 | Aug 1991 | EPX |
Entry |
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Derwent Abstract, JP 01/311,112 Chem. Rev. 1980, 63-97. |
Patent Abstracts of Japan, vol. 11, No. 132 (C-417) Apr. 24, 1987 (English abstract of JP 61 266 409). |