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:
Apr. 30, 2002
Filed:
Oct. 11, 2000
Applicant:
Inventors:
Nongyuan Shi, Hainburg, DE;
Frank Hübner, Mobile, AL (US);
Bernd Drapal, Alzenau, DE;
Rainer Peter, Krombach, DE;
Steffen Krill, Speyer, DE;
Klaus Huthmacher, Gelnhausen, DE;
Christoph Weckenbecker, Gründau-Lieblos, DE;
Assignee:
Degussa AG, Düsseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 4/9203 ;
U.S. Cl.
CPC ...
C07C 4/9203 ;
Abstract
Process for the preparation of unsaturated 4,5-allene ketones by reaction of tertiary propargyl alcohols with alkenyl alkyl ethers or ketals in the presence of aliphatic sulfonic acids or sulfonic acid salts.
Shi, Nongyuan. (2002). Process for the preparation of unsaturated 4,5-allene ketones, 3,5-diene ketones and the corresponding saturated ketones (U.S. Patent No. 6380437). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6380437
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile