Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5328670 | Method of treating nickel-containing etching waste fluid | Yoshiyuki Imagire, Toshiaki Kurihara, Eiichi Akiyoshi, Ryoichi Maekawa | 1994-07-12 |
| 4629606 | Recovery of tungsten compounds | Yoshiyuki Imagire, Nobuo Nonaka, Toshifumi Kitagawa, Yasukazu Murakami, Iwao Abe +3 more | 1986-12-16 |
| 4208390 | Process for the recovery of ammonia and sulphur dioxide from a contaminated ammonium salt of sulphuric acid | Willem J. Wassen | 1980-06-17 |