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. 14, 1997
Filed:
Feb. 22, 1995
Applicant:
Inventors:
Masahiro Murotani, Toyama, JP;
Hajime Mura, Uozu, JP;
Makoto Takeda, Takaoka, JP;
Hiroshi Shibafuchi, Uozu, JP;
Assignee:
Nippon Carbide Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548251 ;
Abstract
A process for producing 5-aminotetrazole comprising the steps of: reacting cyanamide with hydrazine in a solvent to form a salt of aminoguanidine; adding thereto an acid and then a nitrite to form a salt of diazoguanidine; and cyclizing the salt of diazoguanidine, upon heating, to thereby produce the 5-aminotetrazole, without isolating the intermediate product and also a process for producing 5-aminotetrazole or a metal salt thereof in the form of powder by spray drying.