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:
Sep. 16, 1986
Filed:
May. 13, 1985
Applicant:
Inventors:
Howard M Colquhoun, Cheshire, GB;
David F Lewis, Cheshire, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568324 ;
Abstract
A mixture of isomers of fluoro-4'-hydroxybenzophenone are dissolved in an aqueous solution of a base, for example sodium hydroxide, and sufficient acid is added to reduce the pH to not less than 9 and to precipitate 4-fluoro-4'-hydroxybenzophenone having a reduced proportion of other isomers.
Colquhoun, Howard. (1986). Purification of 4-fluoro-4'-hydroxybenzophenone (U.S. Patent No. 4612399). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4612399
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile