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. 20, 1992
Filed:
Jun. 04, 1991
Applicant:
Inventors:
Hans-Juergen Weyer, 6800 Mannheim 1, DE;
Rolf Fischer, 6900 Heidelberg, DE;
Wolfgang Harder, 6940 Weinheim, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548552 ; 548554 ;
Abstract
A process for the preparation of N-substituted pyrrolidones by the catalytic hydrogenation of maleic anhydride, maleic acid and/or fumaric acid in the presence of a primary amine and a solvent, at elevated temperature and pressure, wherein a catalyst is used which contains cobalt and at least one of the elements manganese, copper, phosphorus, molybdenum and/or sodium.
Weyer, Hans-Juergen. (1992). Preparation of n-substituted pyrrolidones (U.S. Patent No. 5157127). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5157127
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile