This application is a divisional of application Ser. No. 07/805,283, filed Dec. 10, 1991, now U.S. Pat. No. 5,186,257 which is a divisional of copending application Ser. No. 756,851 filed Jul. 18, 1985, now U.S. Pat. No. 5,080,809 which is a continuation-in-part of copending application Ser. No. 568,363 filed Jan. 9, 1984, now U.S. Pat. No. 4,951,921, which is a continuation-in-part of copending application Ser. No. 461,707 filed Jan. 28, 1983, now U.S. Pat. No. 4,644,020. This invention relates to new and useful polymers. Further, this invention relates to the preparation of such polymers and their use in the recovery and processing of natural resources, such as for example in such applications as enhanced oil recovery, well drilling, workover and completion; the treatment and thickening of water for use in various applications, and minerals beneficiation. Still further, this invention relates to the introduction of certain polymers of the prior art as well as the inventive polymers of the present invention into subterranean well bores where high temperatures and/or salinity and/or hardness of formation waters are encountered.
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---|---|---|
0094898 | Nov 1983 | EPX |
0095730 | Dec 1983 | EPX |
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Entry |
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Number | Date | Country | |
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Parent | 805283 | Dec 1991 | |
Parent | 756851 | Jul 1985 |
Number | Date | Country | |
---|---|---|---|
Parent | 568363 | Jan 1984 | |
Parent | 461707 | Jan 1983 |