Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6452021 | Process for producing pyromellitic anhydride | Tsukasa Takahashi, Etsushige Matsunami | 2002-09-17 |
| 6153767 | Production process for pyromellitic dianhydride | Toshio Sagane, Tsukasa Takahashi | 2000-11-28 |
| 5902907 | Method for production of fluorenone | Tsukasa Takahashi | 1999-05-11 |
| 5663114 | Catalyst for production of pyromellitic anhydride and method for production of pyromellitic anhydride | Tsukasa Takahashi, Tatsuya Kawabata, Masaaki Okuno, Yasushi Kiyooka, Kenji Ueda | 1997-09-02 |
| 5504218 | Method for production pyromellitic anhydride | Tsukasa Takahashi, Tatsuya Kawabata, Masaaki Okuno, Toshio Sagane, Kenji Ueda | 1996-04-02 |