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:
Feb. 21, 1984
Filed:
Aug. 24, 1982
Applicant:
Inventors:
John B Rose, Letchworth, GB;
Michael B Cinderey, Knebworth, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568319 ;
Abstract
Production of a dihydroxy arylophenone by reacting a diaryl carbonate in the presence of a fluoroalkane sulphonic acid. The diaryl carbonate is preferably diphenyl carbonate, the product so formed being 4,4'-dihydroxy-benzophenone. The sulphonic acid is preferably trifluoromethane sulphonic acid.