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. 07, 1993
Filed:
Jun. 06, 1991
Applicant:
Inventor:
Thomas Meul, Visp, CH;
Assignee:
Lonza Ltd., Gampel/Valais, CH;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07B / ;
U.S. Cl.
CPC ...
562401 ; 560 60 ; 562506 ;
Abstract
The enantiomers of 2,2-dimethylcyclopropanecarboxylic acid are separated by esterification with the hydroxy group of optically active mandelic acid methyl ester, crystallization of the diastereomeric esters and subsequent hydrolysis of the diastereomeric esters.