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:
Feb. 07, 1978
Filed:
Dec. 17, 1976
Applicant:
Inventors:
Ernst Meisert, Leverkusen-Schlebusch, DT;
Peter Fischer, Cologne-Flittard, DT;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DT;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2605 / ;
Abstract
Carbodiimides are prepared by reacting organic isocyanates at a temperature of at least 150.degree. C. in the presence of a catalyst having the formula ##STR1## wherein R and R' are the same or different and represent hydrogen, alkyl, aryl and when joined together form a heterocyclic ring;