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. 22, 1981
Filed:
May. 20, 1977
Applicant:
Inventors:
Sijbrandus E Schaafsma, Beek, NL;
Johannes H Hofman, Maastricht, NL;
Johannes E Claassens, Heerlen, NL;
Assignee:
Stamicarbon, B.V., Geleen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
560126 ; 560121 ; 560174 ;
Abstract
Delta-keto-esters such as 4-oxopentane-1-carboxylic acid methyl ester and the like, are prepared in the presence of a primary amine, a Schiff base, or both, by reacting a ketone having at least one hydrogen atom in the alpha position and an alpha-beta unsaturated carboxylic acid ester in the presence of an acid according to the disclosed invention.
Schaafsma, Sijbrandus. (1981). Preparation of delta-keto-esters (U.S. Patent No. 4291170). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4291170
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile