Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5959147 | Organic sulfide compound and method for production thereof | Norihiro Wakao, Ryuichi Ishikawa | 1999-09-28 |
| 5821382 | Method for manufacturing thiol compounds | Ryuichi Ishikawa, Norihiro Wakao | 1998-10-13 |
| 5763620 | Process for producing alkylene sulfide | Yoshitaka Arita, Norihiro Wakao, Ryuichi Ishikawa | 1998-06-09 |
| 5262570 | Method of producing ethylenediamines | Yuuji Shimasaki, Hideaki Tsuneki, Tetsuro Hayashi, Michio Ueshima | 1993-11-16 |
| 5235107 | Method of producing ethylenediamines | Yuuji Shimasaki, Hideaki Tsuneki, Tetsuro Hayashi, Michio Ueshima | 1993-08-10 |
| 4841060 | Vapor-phase intramolecular dehydration reaction of alkanolamines | Yuuji Shimasaki, Michio Ueshima | 1989-06-20 |
| 4833248 | Catalyst for vapor-phase intramolecular dehydration reaction of alkanolamines | Yuuji Shimasaki, Hideaki Tuneki, Hitoshi Yano, Michio Ueshima | 1989-05-23 |
| 4774218 | Catalyst for vapor-phase intramolecular dehydration reaction of alkanolamines | Yuuji Shimasaki, Hideaki Tuneki, Hitoshi Yano, Michio Ueshima | 1988-09-27 |
| 4731488 | Vapor-phase hydrogen transfer reaction of carbonyl compound with alcohol | Yuuji Shimasaki, Michio Ueshima | 1988-03-15 |