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:
Apr. 06, 1982
Filed:
Nov. 03, 1980
Applicant:
Inventors:
Allan Wexler, Haledon, NJ (US);
Paritosh M Chakrabarti, Cedar Grove, NJ (US);
Michael J Brown, Randolph, NJ (US);
Assignee:
GAF Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568315 ;
Abstract
The partial alkylation of a polyhydroxybenzophenone having ortho- and para-hydroxy substituents to form an ortho-hydroxy, para-alkoxy benzophenone is carried out in the presence of a non-aqueous solvent, viz. a polyethylene glycol or its mono or dialkylated derivatives, whereby high yields of alkylated product are obtained in shorter reaction times.