Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370856 | High strength carbon fiber and pre-carbonized fiber | Yutaka Arai, Masatoshi Furuyama, Hirofumi Sunago | 1994-12-06 |
| 5037589 | Method of producing mesophase pitch type carbon fibers and nozzle for spinning same | Teruo Iwashita, Yutaka Arai, Hirofumi Sunago | 1991-08-06 |
| 4975263 | Process for producing mesophase pitch-based carbon fibers | Masatoshi Furuyama, Yasunori Sajiki, Takeshi Hamada | 1990-12-04 |
| 4631181 | Process for producing mesophase pitch | Mitsuaki Matsumoto, Masatosi Furuyama, Hirofumi Sunago, Masakazu Higuchi | 1986-12-23 |
| 4608127 | Dibenzofuran distillation and crystallization process | Kiyoshi Sakuma, Sunao Tabuchi, Kihachiro Ohta, Masakazu Takeuchi | 1986-08-26 |