Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478956 | Process for preparing bisphenols using pyridinealkanethiol derivatized sulphonated cation exchange resins | Takao Maki, Tetsuo Masuyama, Toshiharu Yokoyama | 1984-10-23 |
| 4423252 | Process for preparing bisphenols | Takao Maki, Tetsuo Masuyama, Toshiharu Yokoyama | 1983-12-27 |