Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7045668 | Production and use of hexafluoroethane | Toshio Ohi | 2006-05-16 |
| 7018598 | Process for producing nitrogen trifluoride | Toshio Ohi | 2006-03-28 |
| 6967260 | Method for purification of tetrafluoromethane and use thereof | Toshio Ohi | 2005-11-22 |
| 6720464 | Production and use of octafluoropropane | Toshio Ohi | 2004-04-13 |
| 6489523 | Process for producing hexafluoroethane and use thereof | Kazunari Kaga, Toshio Ohi | 2002-12-03 |
| 6274782 | Method for purifying hexafluoroethane | Tetsuo Nakajo, Toshio Ohi, Tatsuharu Arai | 2001-08-14 |
| 6162957 | Catalytic decomposition of perfluoro-compound | Tetsuo Nakajo, Masatoshi Hotta, Toshio Ohi, Yusaku Takita | 2000-12-19 |
| 6023007 | Catalytic decomposition of perfluoro-compound | Tetsuo Nakajo, Toshio Ohi, Yusaku Takita | 2000-02-08 |
| 6004377 | System for collecting and refining SF.sub.6 gas and method therefor | Shin Tamata, Toru Tsubaki, Akio Nadamura, Koji Ito, Toshio Ohi | 1999-12-21 |
| 5892134 | Method for producing perfluorocarbon | Tetsuo Nakajo, Toshio Ohi, Tatsuharu Arai | 1999-04-06 |
| 5714648 | Process for producing tetrafluoromethane | Tetsuo Nakajo, Tatsuharu Arai, Toshio Ohi | 1998-02-03 |
| 5710351 | Process for producing hexafluoroethane | Tetsuo Nakajo, Tatsuharu Arai, Toshio Ohi | 1998-01-20 |
| 5675046 | Process for producing perfluorocarbon | Tetsuo Nakajo, Tatsuharu Arai, Toshio Ohi | 1997-10-07 |
| 5444171 | Method for purification of 1,1,1,2-tetrafluoroethane | Toshio Ohi, Hidetoshi Nakayama, Kazuo Muramaki | 1995-08-22 |
| 5382724 | Process for purifying 1,1,1,2-tetrafluoroethane | Tatsuharu Arai, Koichi Katamura, Sadayoshi Yuge, Haruyuki Kawai, Yasuaki Morito | 1995-01-17 |
| 5345015 | Process for producing 1,1,2-tetrafluoroethane | Makoto Miyamura, Tatsuharu Arai, Kazuo Muramaki, Toshio Ohi | 1994-09-06 |
| 5276223 | Process for producing 1,1,1,2-tetrafluoroethane | Tatsuharu Arai, Kazuo Muramaki, Toshio Ohi, Hidetoshi Nakayama, Yoshitaka Shohji | 1994-01-04 |