Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5191020 | Polyphenylene sulfide resin composition | Tetsuo Nakamoto, Kimihiro Kubo | 1993-03-02 |
| 4967014 | Process for producing formaldehyde and derivatives thereof | Junzo Ohtake, Mamoru Kawamura | 1990-10-30 |
| 4962235 | Process for producing high purity formaldehyde | Hirohisa Morishita, Tadashige Hata | 1990-10-09 |
| 4563536 | Method for synthesizing trioxane | Koichi Yoshida, Toshiyuki Iwaisako, Katsuhiko Hamanaka, Hajime Komaki | 1986-01-07 |
| 4493752 | Process for recovering trioxane by plural distillation | Takeshi Naito, Toshiyuki Iwaisako, Kazuhiko Matsuzaki | 1985-01-15 |
| 4436900 | Process for deactivating polymerization catalyst | Kazuhiko Matsuzaki, Toshiyuki Iwaisako | 1984-03-13 |
| 4391741 | Polyoxymethylene composition | Minoru Hamada, Isamu Suzuki, Takeo Yoshida | 1983-07-05 |
| 4381397 | Method for synthesizing trioxane | Koichi Yoshida, Toshiyuki Iwaisako, Katsuhiko Hamanaka, Hajime Komaki | 1983-04-26 |
| 4332644 | Process for separating trioxane | Katsuhiko Hamanaka, Toshiyuki Iwaisako, Koichi Yoshida | 1982-06-01 |
| 4220740 | Process for producing stabilized polyoxymethylene | Kazuhiko Matsuzaki | 1980-09-02 |