Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5304316 | Deinking agent for regenerating waste printed paper comprising reaction product of compound having an OH group, a dicarboxylic acid, or an anhydride thereof | Koji Hamaguchi, Akio Kimura, Shigetoshi Suzue | 1994-04-19 |
| 5288369 | Deinking method and deinking composition | Yoichi Ishibashi, Yoshitaka Miyauchi, Koji Hamaguchi, Hiromichi Takahashi, Takanobu Shiroishi | 1994-02-22 |
| 5281358 | Deinking agent | Koji Hamaguchi, Hiroyoshi Hiramatsu, Yoshitaka Miyauchi | 1994-01-25 |