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.:
Date of Patent:
Feb. 17, 1987
Filed:
Dec. 03, 1984
Applicant:
Inventors:
David C Dehm, Thornton, PA (US);
H Franklin Lawson, Downingtown, PA (US);
Assignee:
Atlantic Richfield Company, Los Angeles, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F / ;
U.S. Cl.
CPC ...
525344 ;
Abstract
A process for producing sulfonated polymers containing styrene moieties and cyclic imide moieties comprises reacting a styrene/maleic anhydride copolymer with a primary amine to produce a polyimide and then subjecting the polyimide to sulfonation wherein both the imidization step and the sulfonation step are conducted in a solvent inert to both reaction steps, such as nitrobenzene.