Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197893 | Dispersant comprising indane ring containing polystyrenesulfonic acid compounds | Junichi Yamada, Tadashi Iihara | 2001-03-06 |
| 5328491 | Method for dispersing and stabilizing a coal/water slurry using a polystyrenesulfonate | Junichi Yamada, Tadashi Iihara | 1994-07-12 |
| 4412945 | Aqueous high concentration slurry of alcohol ethoxylate | Masatoshi Takahashi, Osamu Toisawa, Yasuo Ishizaki | 1983-11-01 |