Issued Patents All Time
Showing 76–77 of 77 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4201872 | Process for preparing purified terephthalic acid | Hiroshi Hashizume | 1980-05-06 |
| 4197412 | Process for preparing terephthalic acid | Hiroshi Hashizume, Yoshiaki Izumisawa | 1980-04-08 |