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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 5621136 B1

PDFFull Text
Date of Patent:
Apr. 15, 1997

Filed:

Oct. 13, 1995

Colorless, non-toxic, stabilized aqueous solution of a c1-c5 alkyl vinyl

Applicant:
Inventors:

Chi-San Wu, Wayne, NJ (US);

James Curry, Wayne, NJ (US);

James P Cullen, Bartonsville, PA (US);

John S McEwan, Paducah, KY (US);

Assignee:

ISP Investments Inc., Wilmington, DE (US);

Attorneys:

Katz; Walter

Maue; Marilyn J.

Ward; Joshua J.

Primary Examiner:

Porifirio Nazario-Gonzalez

Assistant Examiner:

Barbara S Frazier

Int. Cl.
CPC ...
C07C / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
560-2 ;
Abstract

A method of stabilizing an aqueous solution of an acid copolymer of maleic acid and a C.sub.1 -C.sub.5 alkyl vinyl ether against degradation in viscosity or molecular weight upon storage for an extended period of time in aqueous solution at ambient conditions, with a single stabilizing agent, which comprises forming the acid copolymer, preferably directly from a slurry of corresponding anhydride in an organic solvent by hydrolysis in water, and adding superoxide dismutase as the single stabilizing agent to the solution either before or after hydrolysis.

Find Patent Forward Citations

Wu, Chi-San. (1997). Colorless, non-toxic, stabilized aqueous solution of a c1-c5 alkyl vinyl (U.S. Patent No. 5621136). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5621136

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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