Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6579990 | Process for producing refined pyromellitic acid and refined pyromellitic anhydride | Kazuo Tanaka, Atsushi Okoshi | 2003-06-17 |
| 6063938 | Process for producing .epsilon.-caprolactone | Kazuo Tanaka, Atsushi Ohkoshi, Hideaki Fujita | 2000-05-16 |
| 6013831 | Processes for the production of high-purity dimethyl 2, 6-naphthalenedicarboxylate and naphthalenedicarboxylic acid | Hiroshi Machida, Fumiya Zaima, Kazuo Tanaka | 2000-01-11 |