Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5840157 | Deinking agent and method of deinking through flotation using the deinking agent | Masaaki Hagiwara | 1998-11-24 |
| 5417808 | Deinking composition for flotation and deinking method | Yataka Okamoto, Masaaki Hagiwara | 1995-05-23 |
| 5346543 | Deinking agent for reclaiming waste paper | Ikuo Adachi, Yoshiaki Nagai | 1994-09-13 |
| 4715991 | Aqueous high concentration surfactant slurry containing an olefin sulfonate | Osamu Toisawa, Masatoshi Takahashi | 1987-12-29 |