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:
Jan. 20, 1981
Filed:
Nov. 08, 1978
Wilfried Zecher, Leverkusen, DE;
Jurgen Lewalter, Odenthal, DE;
Rudolf Merten, Leverkusen, DE;
Willi Dunwald, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
A process for the preparation of a poly(thio)hydantoin, which comprises reacting an organic isocyanate or isothiocyanate having two or more isocyanate or isothiocyanate moieties with an unsaturated dicarboxylic acid of the formula: ##STR1## at a temperature of from -20.degree. C. to +500.degree. C., wherein R.sub.1 and R.sub.2 are hydrogen, halogen, substituted or unsubstituted aliphatic, aliphatic-aromatic, aromatic or heterocyclic.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile