Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039424 | Method for treating an amine-containing waste water | Masahiko Fujii, Ieyoshi Inoue, Sadakatsu Kumoi | 1991-08-13 |
| 4980507 | Process for producing polyethylenepolyamine | Norimasa Mizui, Yukihiro Tsutsumi | 1990-12-25 |
| 4845297 | Process for producing polyamines | Sadakatsu Kumoi, Yukihiro Tsutsumi | 1989-07-04 |
| 4758600 | Process for the manufacture of ethanol | Satoshi Arimitsu, Katsumi Yanagi, Hitomi Hosono, Toshihiro Saito, Kazuaki Tanaka +5 more | 1988-07-19 |
| 4625064 | Method for producing bis [.beta.(N,N-dimethylamino)ethyl]ether | Sadakatsu Kumoi, Yukihiro Tsutsumi | 1986-11-25 |
| 4492803 | Method for producing bis[.beta.-(N,N-dimethylamino)alkyl]-ether | Sadakatsu Kumoi, Yukihiro Tsutsumi | 1985-01-08 |