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:
Jun. 04, 1991
Filed:
Jul. 18, 1989
Applicant:
Inventors:
John R Molinaro, Kenmore, NY (US);
Joseph A Pawlak, Cheektowaga, NY (US);
Willis T Schwartz, Grand Island, NY (US);
Assignee:
Occidental Chemical Corporation, Grand Island, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549241 ;
Abstract
Oxydiphthalic anhydrides of the formula ##STR1## are prepared by reacting a halophthalic anhydride with potassium carbonate in:
Molinaro, John. (1991). Process for the preparation and recovery of oxydiphthalic anhydrides (U.S. Patent No. 5021168). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5021168
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile