Issued Patents All Time
Showing 1–25 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5756766 | Composition for optical materials and use thereof | Nobuya Kawauchi, Seiichi Kobayashi | 1998-05-26 |
| 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, Yoshinobu Kanemura +1 more | 1998-05-19 |
| 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, Teruyuki Nagata +3 more | 1997-12-02 |
| 5652321 | Composition for optical materials and use thereof | Nobuya Kawauchi, Seiichi Kobayashi | 1997-07-29 |
| 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, Yoshinobu Kanemura +1 more | 1997-01-14 |
| 5578658 | High-speed polymerizable resin composition and lenses obtained therefrom | Kenichi Fujii, Noboru Kawasaki, Toshiyuki Suzuki | 1996-11-26 |
| 5451695 | Polymerizable monomer useful for the preparation of high hardness transparent resins | Noboru Kawasaki, Toshiyuki Suzuki, Kenichi Fujii | 1995-09-19 |
| 5440358 | Optical lens comprised of high surface hardness transparent resin | Toshiyuki Suzuki, Masao Imai, Yoshinobu Kanemura | 1995-08-08 |
| 5393607 | Laminated transparent plastic material and polymerizable monomer | Noboru Kawasaki, Toshiyuki Suzuki, Kenichi Fujii | 1995-02-28 |
| 5374668 | Casting epoxy resin, polythiol and releasing agent to form lens | Yoshinobu Kanemura, Masao Imai | 1994-12-20 |
| 5352758 | Mercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the same | Yoshinobu Kanemura, Seiichi Kobayashi | 1994-10-04 |
| 5336749 | Alicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereof | Ryuji Haseyama, Masatoshi Takagi, Kouzou Hayashi, Kazuyuki Kuroda, Taisaku Kano +1 more | 1994-08-09 |
| 5306799 | High refractive index plastic lens and composition therefor | Seiichi Kobayashi, Yoshinobu Kanemura | 1994-04-26 |
| 5283312 | Mercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the same | Yoshinobu Kanemura, Seiichi Kobayashi | 1994-02-01 |
| 5260439 | Polymerizable monomer having at least one isopropenyl phenyl group and being capable of forming a high surface hardness transparent resin | Toshiyuki Suzuki, Masao Imai, Yoshinobu Kanemura | 1993-11-09 |
| 5250723 | High surface hardness transparent resin and polymerizable monomer | Toshiyuki Suzuki, Masao Imai, Yoshinobu Kanemura | 1993-10-05 |
| 5210286 | Alicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereof | Ryuji Haseyama, Masatoshi Takagi, Kouzou Hayashi, Kazuyuki Kuroda, Taisaku Kano +1 more | 1993-05-11 |
| 5191055 | Mercapto compound, a high refractive index resin and lens and a process for preparing them | Yoshinobu Kanemura, Masao Imai, Toshiyuki Suzuki | 1993-03-02 |
| 5171468 | Aromatic polyisocyanate | Kiyoshi Shikai, Ryuzi Haseyama, Kouzou Hayashi, Akihiro Yamaguchi | 1992-12-15 |
| 5166285 | Hard transparent resins and process for the production thereof | Yoshinobu Kanemura, Masao Imai, Toshiyuki Suzuki | 1992-11-24 |
| 5145927 | High surface hardness transparent resin prepared from a compound having terminal isopropenyl phenyl groups | Toshiyuki Suzuki, Masao Imai, Yoshinobu Kanemura | 1992-09-08 |
| 5126388 | Highly-refractive plastic lens and process for making the lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Yoshinobu Kanemura | 1992-06-30 |
| 5126425 | Low-hygroscopic sulfur-containing urethane resin, coating material and adhesive | Yoshinobu Kanemura, Masao Imai | 1992-06-30 |
| 5126426 | Alicyclic diamines, alicyclic diisocyanates and polyisocyanato-isocyanurates and method for the preparation thereof | Ryuji Haseyama, Masatoshi Takagi, Kouzou Hayashi, Kazuyuki Kuroda, Taisaku Kano +1 more | 1992-06-30 |
| 5124429 | Polyisocyanatoalkylphenyl-isocyanurates, method for the preparation thereof and use thereof | Ryuji Haseyama, Kazuyuki Kuroda, Kouzou Hayashi, Taisaku Kano, Kiyoshi Shikai | 1992-06-23 |