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. 23, 1997
Filed:
Jun. 05, 1995
Applicant:
Inventors:
Michel Costantini, Lyons, FR;
Daniel Manaut, Meyzieu, FR;
Daniel Michelet, Saint-nom-la-Breteche, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568771 ; 568741 ; 568803 ;
Abstract
p-Dihydroxylated aromatic compounds are prepared via the oxidation of p-fuchsones, the latter advantageously being synthesized by reacting a phenolic compound having at least one hydrogen atom in the para-position to the hydroxyl function with a non-enolizable ketonic compound, in the presence of a catalytically effective amount of an acid catalyst and, optionally, a cocatalytically effective amount of an ionizable sulfur-containing compound.
Costantini, Michel. (1997). Preparation of p-fuchsones and synthesis of p-dihydroxylated aromatic (U.S. Patent No. 5670465). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5670465
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile