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:
Oct. 22, 1991
Filed:
Jun. 14, 1990
Applicant:
Inventors:
Lawrence B Fertel, Buffalo, NY (US);
Neil J O'Reilly, Grand Island, NY (US);
Henry C Lin, Grand Island, NY (US);
Assignee:
Occidental Chemical Corporation, Grand Island, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549246 ; 549240 ; 549262 ;
Abstract
A process for the aromatization of 4-chlorotetrahydrophthalic anhydride and 4,5-dichlorotetrahydrophthalic anhydride which comprises heating a solution of either substance in the presence of activated carbon and in the partial absence of air.