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. 25, 1976
Filed:
Dec. 17, 1974
Applicant:
Inventors:
Yukio Tadokoro, Tokyo, JA;
Tadao Shirai, Mobara, JA;
Satoshi Sogabe, Mobara, JA;
Seikichi Yoshikawa, Mobara, JA;
Assignee:
Nippon Chemicals Co., Ltd., Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2604 / ;
Abstract
In the preparation of diaminomaleonitrile by polymerization of hydrogen cyanide, the improvement which comprises employing, as a reaction solvent, at least one mononitrile compound selected from the group consisting of saturated aliphatic mononitriles containing 2 to 4 carbon atoms, methacrylonitrile and aromatic mononitriles.