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:
Jan. 01, 1991
Filed:
Jul. 20, 1989
Applicant:
Inventor:
Jose Moyne, Caluire, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie Cedex, FR;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562471 ; 560 61 ;
Abstract
A process for the preparation of D-hydroxyphenoxypropionic acid and its purification from its reaction mixture containing the acid, together with inorganic salts and various organic impurities, by crystallization of D-hydroxyphenoxypropionic acid by cooling followed by washing the crystals of D-hydroxyphenoxypropionic acid by elution.
Quick Actions:
Moyne, Jose. (1991). Process for the preparation and purification of (U.S. Patent No. 4981998). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4981998
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