Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6939942 | Method of treating by-product salt yielded with polyarylene sulfide | — | 2005-09-06 |
| 6646105 | Process for treating by-product of polyarylene sulfide | — | 2003-11-11 |
| 5194580 | Process for preparing polyarylene sulfides under reduced pressure | Yoshinari Koyama, Masao Ohmori, Minoru Senga | 1993-03-16 |
| 5167775 | Method for recovery of solvent used in production of polyarylene sulfide | Masao Omori, Yoshinari Koyama | 1992-12-01 |
| 5143554 | Process for washing powdery and/or granular resins and a washing device therefor | Yoshinari Koyama | 1992-09-01 |
| 4919911 | Method of recovering a lithium chloride | Masao Omori, Hiroyasu Yamato, Norio Ogata | 1990-04-24 |