Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7316806 | Modifying catalyst for partial oxidation and method for modification | Akiyoshi Nakajima | 2008-01-08 |
| 6380399 | Process for producing phthalic anhydride | Tsukasa Takahashi | 2002-04-30 |
| 6344568 | Catalyst for gas phase partial oxidation | Hiromi Yunoki, Yasushi Kiyooka, Daisuke Nakamura, Michio Tanimoto, Tsukasa Takahashi | 2002-02-05 |
| 6133184 | Catalyst for catalytic oxidation use | Yasushi Kiyooka | 2000-10-17 |
| 5663114 | Catalyst for production of pyromellitic anhydride and method for production of pyromellitic anhydride | Tsukasa Takahashi, Tatsuya Kawabata, Yasuhisa Emoto, Yasushi Kiyooka, Kenji Ueda | 1997-09-02 |
| 5504218 | Method for production pyromellitic anhydride | Tsukasa Takahashi, Tatsuya Kawabata, Yasuhisa Emoto, Toshio Sagane, Kenji Ueda | 1996-04-02 |
| 5235071 | Catalyst for producing phthalic anhydride and process by using the same | Kenji Ueda, Tatsuya Kawabata, Shinya Tanaka | 1993-08-10 |
| 5229527 | Method for production of phthalic anhydride by vapor-phase oxidation of mixture of ortho-xylene with naphthalene | Kenji Ueda, Tatsuya Kawabata, Shinya Tanaka | 1993-07-20 |
| 5169820 | Catalyst for producing phthalic anhydride | Kenji Ueda, Tatsuya Kawabata, Chisako Nishio, Shinya Tanaka | 1992-12-08 |