Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5009751 | Process for separation of hafnium tetrachloride from zirconium tetrachloride | Ippei Nakagawa, Yoshinobu Seki, Yutaka Honda, Yasuo Ichihara | 1991-04-23 |
| 4925537 | Process for separation of hafnium tetrachloride from zirconium tetrachloride and electrode | Ippei Nakagawa, Yoshinobu Seki, Yutaka Honda, Yasuo Ichihara | 1990-05-15 |
| 4857155 | Process of separation of hafnium from zirconium by molten salt electrolysis | Ippei Nakagawa, Yoshinobu Seki, Yutaka Honda | 1989-08-15 |