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:
Jun. 07, 1977
Filed:
Feb. 17, 1976
Applicant:
Inventors:
Gunther Rottloff, Cologne, DT;
Rudolf Sundermann, Leverkusen, DT;
Ernst Grigat, Odenthal-Gloebusch, DT;
Rolf Putter, Duesseldorf, DT;
Assignee:
Bayer Aktiengesellschaft, , DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ; 2604 / ; 260463 ;
Abstract
Highly pure aromatic polyfunctional cyanic acid esters having a high stability in storage and being extraordinarily suitable for use as starting compound for the production of plastics by cyclopoly-tri-merization are obtained by a special process. A di- or polytrialkyl ammonium phenolate of the formula: ##STR1## in which Ar represents an optionally substituted aromatic radical,