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:
Jan. 20, 1987
Filed:
Dec. 11, 1985
Applicant:
Inventors:
Ellis K Fields, River Forest, IL (US);
Mark L Winzenburg, Naperville, IL (US);
Steven J Behrend, Glendale Heights, IL (US);
Assignee:
Standard Oil Company (Indiana), Chicago, IL (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549234 ; 549235 ;
Abstract
Di-substituted maleic anhydride compounds are disclosed of the structural formula ##STR1## wherein R and R.sup.1 are selected from the group consisting of aliphatic and phenyl moieties, and R.sup.2 is a divalent aromatic moiety. Polyamide-imide polymers, polyimide polymers and vinyl copolymers derived therefrom are also disclosed.