Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8211997 | Process for producing polyarylene sulfide | Mitsuhiro Matsuzaki, Masanori Kobayashi | 2012-07-03 |
| 4976825 | Process for recovering N-methylpyrrolidone by plural distillations | Takao Iwasaki, Yuzo Yoshiji | 1990-12-11 |