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:
Mar. 21, 2000
Filed:
Aug. 16, 1999
Shunji Hyoda, Sakaide, JP;
Masaharu Kita, Sakaide, JP;
Hirotoshi Sawada, Sakaide, JP;
Shuichi Nemugaki, Sakaide, JP;
Sumio Otsuka, Takamatsu, JP;
Yoshitaka Miyawaki, Takamatsu, JP;
Takashi Ogawa, Takamatsu, JP;
Yuhki Kubo, Takamatsu, JP;
Japan Hydrazine Co., Inc, , JP;
Abstract
A process for the preparation of a 5,5'-bi-1H-tetrazole diammonium salt by using dicyan, sodium azide, ammonium chloride and water as a reaction medium. This process is industrially advantageous since the 5,5'-bi-1H-tetrazole diammonium salt is synthesized and, then, the precipitated crystals thereof are simply isolated by filtration to obtain the 5,5'-bi-1H-tetrazole diammonium salt maintaining an yield which is not lower than 90%. The 5,5'-bi-1H-tetrazole diammonium salt is a gas-generating agent for air bags, which is lowly toxic and is easy to handle.