Issued Patents All Time
Showing 1–25 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6632949 | Halogenating agents | Hiroshi Sonoda, Kazunari Okada, Akira Takahashi, Kouki Fukumura, Hidetoshi Hayashi +1 more | 2003-10-14 |
| 6458990 | Nitrogen-based halogenating agents and process for preparing halogen-containing compounds | Hiroshi Sonoda, Kazunari Okada, Akira Takahashi, Kouki Fukumura, Hidetoshi Hayashi +1 more | 2002-10-01 |
| 6417361 | Fluorination agent and preparation and use of same | Hidetoshi Hayashi, Hiroshi Sonoda, Ken'ichi Goto, Kouki Fukumura, Junko Naruse +5 more | 2002-07-09 |
| 6329529 | Nitrogen-based halogenating agents and process for preparing halogen-containing compounds | Hiroshi Sonoda, Kazunari Okada, Akira Takahashi, Kouki Fukumura, Hidetoshi Hayashi +1 more | 2001-12-11 |
| 6222046 | Tetraalkylfluoroformamidinium trifluoroacetate and preparation process of same | Hidetoshi Hayashi, Hiroshi Sonoda, Kenichi Goto, Kouki Fukumura, Junko Naruse | 2001-04-24 |
| 6127583 | Process for preparing acetylene derivative from a ketone compound | Hiroshi Sonoda, Kazunari Okada, Kenichi Goto, Kouki Fukumura, Junko Naruse +2 more | 2000-10-03 |
| 6100362 | Sulfur-containing urethane-based resin and composition and process for producing the resin | Koju Okazaki, Yoshinobu Kanemura | 2000-08-08 |
| 5955206 | Polysulfide-based resin composition, polysulfide-based resin, and optical material comprising the resin | Koju Okazaki, Chitoshi Shimakawa, Mamoru Tanaka, Yoshinobu Kanemura, Yoshihiro Irizato +1 more | 1999-09-21 |
| 5872260 | High purity 1,3-dialkyl-2-imidazolidinone and preparation process of same | Hideki Mizuta, Masazumi Takaoka | 1999-02-16 |
| 5837797 | Process for preparing a sulfur-containing urethane-based plastic lens and the lens prepared thereby | Koju Okazaki, Yoshinobu Kanemura | 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 | Koju Okazaki, Tohru Miura, Nobuyuki Kajimoto, Yoshinobu Kanemura, Katsuyoshi Sasagawa +1 more | 1998-05-19 |
| 5750779 | Preparation process of acyl halide or sulfonyl halide | Hidetoshi Hayashi, Hideki Mizuta | 1998-05-12 |
| 5736609 | Sulfur-containing urethane-based resin composition, its resin, and optical element and lens comprising resin | Yoshihiro Irizato, Shinichi Umeda, Yoshinobu Kanemura | 1998-04-07 |
| 5719256 | Process for preparing polycondensation polymer compound | Shoji Tamai, Yukiko Mori, Kenichi Goto, Katsuji Watanabe, Osamu Kohgo +5 more | 1998-02-17 |
| 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 |
| 5594149 | Process for producing 1,3-dialkyl-2-imidazolidinone | Hiroshi Naruse, Hideki Mizuta, Shinichi Umeda | 1997-01-14 |
| 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 |
| 5583256 | Process for producing 1,3-dialkyl-2-imidazolidinone | Hiroshi Naruse, Hideki Mizuta, Shinichi Umeda | 1996-12-10 |
| 5545751 | Process for the preparation of 4-methoxy-2,2',6'-Trimethyldiphenylamine | Chiyuki Kusuda, Masayuki Furuya, Masaru Wada, Yoshihiro Irizato, Hiroshi Naruse | 1996-08-13 |
| 5545752 | Process for the preparation of diphenylamine or nucleus-substituted derivative thereof | Chiyuki Kusuda, Masaru Wada | 1996-08-13 |