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:
May. 26, 1981
Filed:
Dec. 05, 1979
Applicant:
Inventors:
Jurgen Lewalter, Odenthal, DE;
Ludwig Rottmaier, Odenthal, DE;
Rudolf Merten, Leverkusen, DE;
Wilfried Zecher, Leverkusen, DE;
Willi Dunwald, Leverkusen, DE;
Bernhard Schulte, Krefeld, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08G / ;
U.S. Cl.
CPC ...
260 302 ; 260 / ; 260 / ; 260 / ; 260 / ; 260 322 ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 260 / ; 528 48 ; 528 49 ; 528 52 ; 528 73 ; 528 74 ; 528 75 ; 528 84 ;
Abstract
A process for the production of compounds containing hydantoin groups by reacting .alpha.-amino-carboxylic acid derivatives and organic isocyanates in the presence of acid groups and either in absence of any solvent or in the presence of a non-phenolic solvent.