Issued Patents All Time
Showing 1–25 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6770734 | Polythiol compound | Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi | 2004-08-03 |
| 6770735 | Process for preparing a thiol compound | Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi | 2004-08-03 |
| 6664364 | Selenium-containing transparent optical material | Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Masahiko Kusumoto | 2003-12-16 |
| 6596841 | Polythiol, polymerizable composition, resin and lens, and process for preparing thiol compound | Mamoru Tanaka, Shigetoshi Kuma, Seiichi Kobayashi | 2003-07-22 |
| 6482918 | Selenium-containing transparent optical material | Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Masahiko Kusumoto | 2002-11-19 |
| 6458917 | Polymerizable composition | Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu | 2002-10-01 |
| 6365707 | Polymerizable composition and process for producing optical resin comprising the same | Akinori Ryu, Seiichi Kobayashi, Hiroyuki Morijiri, Chitoshi Shimakawa, Koju Okazaki +1 more | 2002-04-02 |
| 6303747 | Selenium-containing transparent optical material | Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Masahiko Kusumoto | 2001-10-16 |
| 6300464 | Polymerizable composition | Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu | 2001-10-09 |
| 6204311 | Polymerizable composition | Hiroyuki Morijiri, Seiichi Kobayashi, Koju Okazaki, Chitoshi Shimakawa, Akinori Ryu | 2001-03-20 |
| 6124424 | Selenized transparent optical material | Koju Okazaki, Mamoru Tanaka, Shiro Honma, Hiroyuki Morijiri, Masahiko Kusumoto | 2000-09-26 |
| 6100362 | Sulfur-containing urethane-based resin and composition and process for producing the resin | Koju Okazaki, Teruyuki Nagata | 2000-08-08 |
| 5973168 | Preparation process of phthalide compound | Takeshi Nishimura, Masaru Wada, Satoshi Nakao, Mansuke Matsumoto | 1999-10-26 |
| 5955206 | Polysulfide-based resin composition, polysulfide-based resin, and optical material comprising the resin | Koju Okazaki, Chitoshi Shimakawa, Mamoru Tanaka, Teruyuki Nagata, Yoshihiro Irizato +1 more | 1999-09-21 |
| 5837797 | Process for preparing a sulfur-containing urethane-based plastic lens and the lens prepared thereby | Koju Okazaki, Teruyuki Nagata | 1998-11-17 |
| 5753730 | 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 | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Katsuyoshi Sasagawa +1 more | 1998-05-19 |
| 5736609 | Sulfur-containing urethane-based resin composition, its resin, and optical element and lens comprising resin | Yoshihiro Irizato, Shinichi Umeda, Teruyuki Nagata | 1998-04-07 |
| 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, Teruyuki Nagata, Seiichi Kobayashi +3 more | 1997-12-02 |
| 5608115 | Polythiol useful for preparing sulfur-containing urethane-based resin and process for producing the same | Koju Okazaki, Teruyuki Nagata | 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 | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Katsuyoshi Sasagawa +1 more | 1997-01-14 |
| 5523467 | Process for the preparation of aliphatic polyisocyanates | Koju Okazaki, Teruyuki Nagata | 1996-06-04 |
| 5440358 | Optical lens comprised of high surface hardness transparent resin | Toshiyuki Suzuki, Katsuyoshi Sasagawa, Masao Imai | 1995-08-08 |
| 5374668 | Casting epoxy resin, polythiol and releasing agent to form lens | Katsuyoshi Sasagawa, Masao Imai | 1994-12-20 |
| 5352758 | Mercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the same | Katsuyoshi Sasagawa, Seiichi Kobayashi | 1994-10-04 |
| 5306799 | High refractive index plastic lens and composition therefor | Seiichi Kobayashi, Katsuyoshi Sasagawa | 1994-04-26 |