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:
Oct. 30, 1990
Filed:
Jun. 08, 1989
Applicant:
Inventor:
Laurent Duc, Sion, CH;
Assignee:
Lonza Ltd., Gampel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560183 ; 560184 ;
Abstract
A process for the production of 4-chloro-3-alkoxy-but-2E-enoic acid alkyl esters starting from 4-chloroacetoacetic acid chloride by reaction with a dialkyl sulfite. The produced intermediate products are used as structural elements for, i.a., pharmaceutical agents.
Duc, Laurent. (1990). Process for the production of 4-chloro-3-alkoxy-but-2e-enoic acid alkyl (U.S. Patent No. 4966989). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4966989
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile