Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5219551 | Process for preparing hydrogen fluoride | Kunihiko Terase, Sadao Hagita, Kouichi Yokoyama, Yasuhiro Sanada, Michiomi Nagase | 1993-06-15 |
| 4406869 | Process for producing anhydrous sodium carbonate crystal | Keiichi Nakaya, Kohji Kawanami | 1983-09-27 |
| 4405592 | Process for producing anhydrous sodium carbonate crystal | Keiichi Nakaya, Kohji Kawanami | 1983-09-20 |
| RE30411 | Process for purifying sodium hydroxide | Keiichi Nakaya, Kunio Sato | 1980-10-07 |