Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5202104 | Process for preparing silica having a low silanol content | Naotake Watanabe, Koichi Orii, Iwao Ohshima | 1993-04-13 |
| 4683128 | Process for manufacturing high purity silica | Koichi Orii, Masashi Nishida, Iwao Ohshima | 1987-07-28 |
| 4582936 | Process for producing dimethylamine in preference to mono- and trimethylamines by gas phase catalytic reaction of ammonia with methanol | Yoshiro Ashina, Takeyuki Fujita, Michio Fukatsu | 1986-04-15 |
| 4578516 | Process for producing dimethylamine in preference to mono- or trimethylamine by vapor-phase catalytic reaction of methanol and ammonia | Yoshiro Ashina, Takeyuki Fujita, Michio Fukatsu | 1986-03-25 |