Claims
- 1. A copolymer of polysuccinimide and a polycarboxylic acid.
- 2. The copolymer of claim 1 wherein the polycarboxylic acid is selected from the group consisting of adipic acid, citric acid, fumaric acid, malic acid, malonic acid, succinic acid, glutaric acid, oxalic acid, pimelic acid, itaconic acid, nonanedioic acid, dodecanedioic acid, octanedioic acid, isophthalic, terephthalic and phthalic acid.
CROSS-REFERENCE TO RELATED APPLICATIONS AND PATENTS
The present patent application is a divisional application of U.S. patent application Ser. No. 07/994,922, filed Dec. 22, 1992, in the names of Louis L. Wood and Gary J. Calton. U.S. patent application Ser. No. 07/994,922 issued to U.S. Pat. No. 5,408,028 on Apr. 18, 1995.
US Referenced Citations (18)
Divisions (1)
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Number |
Date |
Country |
Parent |
994922 |
Dec 1992 |
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