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:
Aug. 22, 2000
Filed:
May. 07, 1999
Applicant:
Inventors:
Tooru Futagawa, Hyogo, JP;
Jean-Pierre Canvat, Brussels, BE;
Emile Cavoy, Ham-Sur-Heure, BE;
Michel Deleers, Linkebeek, BE;
Michel Hamende, Uccle, BE;
Vincent Zimmermann, Brussels, BE;
Assignees:
UCB, S.A., Brussels, BE;
Daicel Chemical Industries, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
548543 ; 548546 ; 548547 ; 548550 ;
Abstract
Levetiracetam is prepared by optical resolution of etiracetam by means of preparative high performance liquid chromatography or continuous simulated moving bed chromatographic system using silica gel supporting amylose tris(3,5-dimethylphenylcarbamate) as a packing material.