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. 17, 1989
Filed:
Jun. 24, 1987
Applicant:
Inventor:
Christian Berger, Ecully, FR;
Assignee:
Rhone-Poulenc Sante, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
544 41 ;
Abstract
Levomepromazine hydrogen maleate is prepared by resolving (.+-.)-10-(3-dimethylamino-2-methylpropyl)-2-methoxyphenothiazine with (-)-di(p-toluoyl)-L-tartaric acid to produce the neutral salt of the dextrorotatory base and then adding maleic acid to the mother liquors to precipitate the levomepromazine hydrogen maleate.