Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5695603 | Deinking agent with polyoxyalkylene group consisting of specific block and random arrangement units and method for reclaiming waste paper using same | Daisuke Shiba, Takanobu Shiroishi | 1997-12-09 |
| 5672244 | High temperature deinking method using an alkylene oxide adduct | Hiromichi Takahashi | 1997-09-30 |
| 5643409 | Method for deinking wastepaper | Yoichi Ishibashi, Hideaki Urushibata | 1997-07-01 |