Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7122676 | Process for the preparation of 5,5′-bi-1H-tetrazolediammonium salts using hydrazine hydrate and dicyan as starting materials | Masaharu Kita, Hirotoshi Sawada, Shuichi Nemugaki, Takahiro Ueta, Kohki Satoh | 2006-10-17 |
| 6433181 | Process for the preparation of highly pure 5,5′-bi-1H-tetrazolediammonium salts | Masaharu Kita, Atsushi Sugino, Shuichi Nemugaki, Takahiro Ueta, Koki Sato | 2002-08-13 |
| 6194577 | Process for producing alicyclic hydrazine derivatives, tetra-hydropyridazine and hexahydropyridazine | Youichi Hasegawa, Hiroyuki Fujita, Hirotoshi Sawada, Yasuo Oki | 2001-02-27 |
| 6156906 | Process for the preparation of 5,5'-bi-1H-tetrazole salt | Masaharu Kita, Hirotoshi Sawada, Shuichi Nemugaki, Takahiro Ueta, Kohki Satoh +3 more | 2000-12-05 |
| 6040453 | Method for preparing 5,5'-bi-1H-tetrazole salt | Masaharu Kita, Hirotoshi Sawada, Shuichi Nemugaki, Sumio Otsuka, Yoshitaka Miyawaki +2 more | 2000-03-21 |
| 5977360 | Process for producing cyclic hydrazine derivatives, tetra-hydropyridazine and hexahydropyridazine | Youichi Hasegawa, Hiroyuki Fujita, Hirotoshi Sawada, Yasuo Oki | 1999-11-02 |
| 5731465 | Process for the preparation of tertiary butyl hydrazine hydrohalogenide | Yoichi Hasegawa, Mineo Nakagawa, Hiroyuki Fujita, Takafumi Kawada | 1998-03-24 |
| 5618978 | Method of producing choline of a high purity | Youichi Hasegawa, Fumio Toda | 1997-04-08 |