Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Yoshinobu Kanemura, Katsuyoshi Sasagawa +1 more | 1998-05-19 |
| 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, Yoshinobu Kanemura, Katsuyoshi Sasagawa +1 more | 1997-01-14 |
| 5126388 | Highly-refractive plastic lens and process for making the lens | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Yoshinobu Kanemura, Katsuyoshi Sasagawa | 1992-06-30 |
| 5021503 | Resin for plastic lens having high-refractive index, lens comprising the resin, and method for preparation of the lens | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Yoshinobu Kanemura, Katsuyoshi Sasagawa | 1991-06-04 |
| 5013496 | Process for molding a highly-refractive plastic lens | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Yoshinobu Kanemura, Katsuyoshi Sasagawa | 1991-05-07 |
| 4952731 | Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines | Teruyuki Nagata, Akihiro Tamaki, Masaru Wada | 1990-08-28 |
| 4946923 | S-alkyl thiocarbamate base resin, plastic lens comprising the resin, and process for making the lens | Teruyuki Nagata, Koju Okazaki, Tohru Miura, Yoshinobu Kanemura, 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, Tohru Miura, Yoshinobu Kanemura, Katsuyoshi Sasagawa | 1990-05-29 |
| 4918186 | Process for producing cyclic ureas | Teruyuki Nagata, Masaru Wada | 1990-04-17 |
| 4900820 | Process for producing cyclic ureas | Teruyuki Nagata, Masaru Wada | 1990-02-13 |
| 4871875 | Process for producing diphenylamines or N,N'-diphenylphenylenediamines | Teruyuki Nagata, Akihiro Tamaki, Masaru Wada | 1989-10-03 |
| 4804783 | Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines | Teruyuki Nagata, Akihiro Tamaki, Masaru Wada | 1989-02-14 |
| 4791185 | High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol | Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai, Teruyuki Nagata | 1988-12-13 |
| 4780522 | Sulfur-containing polyurethane base lens resin | Akihiro Tamaki, Teruyuki Nagata | 1988-10-25 |
| 4775733 | High-refractivity plastic lens resin formed by reacting at least one polyisocyanate with at least one polythiol | Yoshinobu Kanemura, Masao Imai, Katsuyoshi Sasagawa, Teruyuki Nagata | 1988-10-04 |
| 4731453 | Process for producing 1, 3-dialkyl-2-imidazolidinone | Teruyuki Nagata, Masaru Wada, Hideki Mizuta, Akihiro Tamaki | 1988-03-15 |
| 4689387 | S-alkyl thiocarbamate base lens resin | Akihiro Tamaki, Teruyuki Nagata | 1987-08-25 |
| 4680369 | Sulfur-containing polyurethane base lens resin | Akihiro Tamaki, Teruyuki Nagata | 1987-07-14 |
| 4668793 | Process for producing 1,3-dimethyl-2-imidazolidinone | Teruyuki Nagata, Masaru Wada, Hitoshi Nakayama, Tadao Yamada | 1987-05-26 |