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:
Aug. 03, 1993
Filed:
Jun. 12, 1992
Applicant:
Inventors:
Neil J O'Reilly, Grand Island, NY (US);
William S Derwin, Buffalo, NY (US);
Henry C Lin, Grand Island, NY (US);
Assignee:
Occidental Chemical Corporation, Niagara Falls, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
562479 ; 562494 ;
Abstract
3,4,6-Trifluorophthalic acid may be decarboxylated in a controlled manner to form 2,4,5-trifluorobenzoic acid by heating the phthalic acid in a dipolar aprotic solvent in the absence of any catalyst.