Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6197893 | Dispersant comprising indane ring containing polystyrenesulfonic acid compounds | Junichi Yamada, Mituo Sugiyama | 2001-03-06 |
| 5328491 | Method for dispersing and stabilizing a coal/water slurry using a polystyrenesulfonate | Junichi Yamada, Mituo Sugiyama | 1994-07-12 |