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. 22, 1991
Filed:
Oct. 17, 1989
Applicant:
Inventors:
Reinhard Lantzsch, Wuppertal, DE;
Karl Steinbeck, Leawood, KS (US);
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
562506 ;
Abstract
A process for the preparation of trans-2,2-di-methyl-3-(2,2-dichlorovinyl)-cyclopropanecarboxylic acid of the formula (I) ##STR1## comprising reacting a chloroketone of the formula (II) ##STR2## in which Z represents chlorine or bromine, with an aqueous solution of an alkali metal hydroxide.