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. 17, 1996
Filed:
May. 24, 1995
Applicant:
Inventors:
G unther Semler, Kelkheim, DE;
Michael Meier, Frankfurt, DE;
Assignee:
Hoechst Aktiengesellschaft, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560 47 ;
Abstract
Process for preparing 3-chloroanthranilic alkyl esters by reacting 3-chloroanthranilic acid, in an inert solvent, with from 0.8 to 5 parts by weight of phosgene, and reacting the 3-chloroisatoic anhydride which is formed with an alkanol, where appropriate in the presence of an esterification catalyst, to give the 3-chloroanthranilic alkyl ester.