Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6713225 | 1,2-Naphthoquinone-2-diazidesulfonate ester photosensitive agent, method for producing the photosensitive agent, and photoresist composition | Miharu Suwa, Yuichi Hagiwara, Katsumi Tada, Suehiro Katori, Tsuneaki Miyazaki | 2004-03-30 |
| 6274714 | Method for producing 1,2-naphthoquinone-2-diazide-4-sulfonyl chloride | Seiju Tobishima, Naoki Sato, Nobuhiro Yoneyama, Yuki Hotta, Toshio Itahana +1 more | 2001-08-14 |
| 6077941 | Method for producing 1,2-naphthoquinone-2-diazide derivatives | Nobuhiro Yoneyama, Seiju Tobishima, Toshio Itahana, Kunihiko Kojima | 2000-06-20 |
| 5589315 | Photosensitive compositions comprising photosensitive polyfunctional aromatic diazo compounds, and presensitized lithographic plates formed with the same | Noriaki Tochizawa, Yasuo Kuniyoshi, Masaharu Watanabe, Katsuyo Tokuda, Ichiro Hozumi | 1996-12-31 |
| 5459011 | Liquid or paste photosensitive composition containg aromatic diazo compound and lactic acid, hydroxyacetic acid or mixture thereof | Kieko Harada, Katsuyo Tokuda | 1995-10-17 |
| 5430130 | Photosensitive polyfunctional aromatic diazo compounds useful in photosensitive compositions | Noriaki Tochizawa, Yasuo Kuniyoshi, Masaharu Watanabe, Katsuyo Tokuda, Ichiro Hozumi | 1995-07-04 |
| 5206349 | Aromatic diazo compounds and photosensitive compositions using the same | Hajime Arai, Hitoshi Sugiura, Katsuhiko Sugou, Kieko Harada | 1993-04-27 |