Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5075453 | Process for producing aryloxy-substituted phosphazene derivatives | Kazuhiko Fujikawa, Yasuhiro Yoshikawa, Tetsuhiko Okamoto, Masayuki Furukawa, Tadaichi Nishikawa | 1991-12-24 |
| 4880905 | Process for producing organophosphazene polymers with chlorophosphazene | Yasuhiro Yoshikawa, Tetsuhiko Okamoto | 1989-11-14 |
| 4855389 | Process for producing phosphonitrile oligomers containing maleimidophenoxy group | Masayuki Furukawa, Tadaichi Nishikawa | 1989-08-08 |
| 4795621 | Process for the preparation of phosphonitrile chloride oligomer | Tetsuhiko Okamoto, Kazuhiko Fujikawa | 1989-01-03 |
| 4571310 | Process for preparing alkoxyphosphonitrile compounds | Hiroshi Tanino, Tetsuhiko Okamoto, Kazuhiko Fuzikawa | 1986-02-18 |
| 4567028 | Process for the preparation of phosphonitrile chloride oligomer | Hiroshi Tanino, Tetsuhiko Okamoto | 1986-01-28 |
| 4522689 | Process for purifying phosphonitrile chlorides | Hiroshi Tanino, Tetsuhiko Okamoto, Kazuhiko Fujikawa, Takatoshi Tsumiyama | 1985-06-11 |