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:
Aug. 16, 1994
Filed:
Jul. 24, 1992
Applicant:
Inventors:
Artur Botta, Krefeld, DE;
Hans-Josef Buysch, Krefeld, DE;
Otto Immel, Krefeld, DE;
Lothar Puppe, Burscheid, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
548552 ; 548427 ; 548472 ; 548952 ; 546101 ; 546154 ; 546290 ; 540451 ; 540470 ; 540485 ; 540476 ;
Abstract
Substituted lactams of the formula ##STR1## can be prepared from lactam N-carboxylates or lactim O-carboxylates of the formulae ##STR2## by thermal or mixed thermal and catalysed CO.sub.2 elimination at 80.degree.-450.degree. C. Lactams substituted on the N atom by aliphatic groups such as those produced herein are useful as industrial aprotic solvents.
Botta, Artur. (1994). Process for the preparation of n-substituted lactams (U.S. Patent No. 5338861). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5338861
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile