Issued Patents All Time
Showing 26–45 of 45 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5283312 | Mercapto compound, its preparation process, and sulfur-containing urethane resins and lenses using the same | Katsuyoshi Sasagawa, 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, Katsuyoshi Sasagawa, Masao Imai | 1993-11-09 |
| 5250723 | High surface hardness transparent resin and polymerizable monomer | Toshiyuki Suzuki, Katsuyoshi Sasagawa, Masao Imai | 1993-10-05 |
| 5191055 | Mercapto compound, a high refractive index resin and lens and a process for preparing them | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1993-03-02 |
| 5166285 | Hard transparent resins and process for the production thereof | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1992-11-24 |
| 5145927 | High surface hardness transparent resin prepared from a compound having terminal isopropenyl phenyl groups | Toshiyuki Suzuki, Katsuyoshi Sasagawa, Masao Imai | 1992-09-08 |
| 5126388 | Highly-refractive plastic lens and process for making the lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Katsuyoshi Sasagawa | 1992-06-30 |
| 5126425 | Low-hygroscopic sulfur-containing urethane resin, coating material and adhesive | Katsuyoshi Sasagawa, Masao Imai | 1992-06-30 |
| 5104953 | Hard transparent resins and process for the production thereof | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1992-04-14 |
| 5087758 | Mercapto compound, a high refractive index resin and lens and a process for preparing them | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1992-02-11 |
| 5084538 | High surface hardness transparent resin prepared from a compound having at least one isopropenyl phenyl group | Toshiyuki Suzuki, Katsuyoshi Sasagawa, Masao Imai | 1992-01-28 |
| 5059673 | Resin for urethane lenses, lenses comprising the resin, and a process for preparation of the resin and the lenses | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1991-10-22 |
| 5021503 | Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Katsuyoshi Sasagawa | 1991-06-04 |
| 5013496 | Process for molding a highly-refractive plastic lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Katsuyoshi Sasagawa | 1991-05-07 |
| 4980497 | Monomer of carbonate ester having isopropenylphenyl group | Katsuyoshi Sasagawa, Masao Imai, Toshiyuki Suzuki | 1990-12-25 |
| 4946923 | S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Katsuyoshi Sasagawa | 1990-08-07 |
| 4929707 | Polyurethane base lens resin, plastic lens comprising the resin and preparation method of the lens | Teruyuki Nagata, Koju Okazaki, Nobuyuki Kajimoto, Tohru Miura, Katsuyoshi Sasagawa | 1990-05-29 |
| 4791185 | High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol | Katsuyoshi Sasagawa, Masao Imai, Teruyuki Nagata, Nobuyuki Kajimoto | 1988-12-13 |
| 4775733 | High-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiol | Masao Imai, Katsuyoshi Sasagawa, Nobuyuki Kajimoto, Teruyuki Nagata | 1988-10-04 |
| 4542201 | Resin for high-refractivity lenses and lenses made of same resin | Masao Imai, Katsuyoshi Sasagawa | 1985-09-17 |