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:
Apr. 15, 1986
Filed:
May. 15, 1981
Applicant:
Inventor:
John A Donohue, Elmhurst, IL (US);
Assignee:
Standard Oil Company (Indiana), Chicago, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
560 76 ; 562488 ; 562412 ; 2605 / ; 528 65 ; 528 66 ; 528 85 ; 528308 ; 528347 ; 528348 ;
Abstract
2,2',6,6'-Tetramethyl-4,4'-dicarboxylic acid is prepared by the oxidation of bimesityl and derivatives of the dicarboxylic acid are used in the preparation of polyesters of high molecular weight.