Issued Patents 1997
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693738 | Composition for urethane-base plastic lens, urethane-base plastic lens obtained from the composition, and process for the production of the plastic lens | Koju Okazaki, Chitoshi Shimakawa, Mamoru Tanaka, Yoshinobu Kanemura, Seiichi Kobayashi +3 more | 1997-12-02 |
| 5654483 | Process for producing alkoxy-substituted triphenylamines | Chiyuki Kikuchi, Hiroshi Naruse, Masaru Wada | 1997-08-05 |
| 5647896 | Color-developing agents and color-developing sheets | Takeshi Nishimura, Tomoko Kamashita, Masaru Wada, Yoshimitsu Tanabe, Kiyoharu Hasegawa +1 more | 1997-07-15 |
| 5618980 | Method for preparing aromatic secondary amino compound | Chiyuki Kusuda, Masaru Wada, Kenichi Satou, Masae Uchida | 1997-04-08 |
| 5616806 | Process for preparing high-purity aniline | Katsuji Watanabe, Yoshitsugu Kono, Akihiro Tamaki, Takashi Kobayashi | 1997-04-01 |
| 5608115 | Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing the same | Koju Okazaki, Yoshinobu Kanemura | 1997-03-04 |
| 5594088 | Plastic lenses having a high-refractive index, process for the preparation thereof and casting polymerization process for preparing sulfur containing urethane resin lens and lens prepared thereby | Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Yoshinobu Kanemura, Katsuyoshi Sasagawa +1 more | 1997-01-14 |
| 5594149 | Process for producing 1,3-dialkyl-2-imidazolidinone | Hiroshi Naruse, Hideki Mizuta, Shinichi Umeda | 1997-01-14 |