Issued Patents All Time
Showing 51–71 of 71 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877907 | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Tohru Miura, Koju Okazaki, Masayuki Furuya, Emiko Nishida | 1989-10-31 |
| 4873374 | Preparation process of 4,4'-biphenol, precursor of same and preparation process of precursor | Tohru Miura, Koju Okazaki, Masayuki Furuya, Emiko Nishida | 1989-10-10 |
| 4871875 | Process for producing diphenylamines or N,N'-diphenylphenylenediamines | Akihiro Tamaki, Nobuyuki Kajimoto, Masaru Wada | 1989-10-03 |
| 4851590 | Method of purifying 2,4-xylenol | Tohru Miura, Katsuju Watanabe, Hitoshi Nakayama, Masayuki Furuya | 1989-07-25 |
| 4814488 | 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives and process for preparing same | Tohru Miura | 1989-03-21 |
| 4804783 | Process for producing diphenylamines or N,N'-diphenyl-phenylenediamines | Akihiro Tamaki, Nobuyuki Kajimoto, Masaru Wada | 1989-02-14 |
| 4791185 | High-refractivity plastic lens resin formed from a polyisocyanate and a polythiol | Yoshinobu Kanemura, Katsuyoshi Sasagawa, Masao Imai, Nobuyuki Kajimoto | 1988-12-13 |
| 4785132 | Process for preparing cyclohexanonecarboxylic acid compounds | Tohru Miura, Hideki Mizuta | 1988-11-15 |
| 4780522 | Sulfur-containing polyurethane base lens resin | Nobuyuki Kajimoto, Akihiro Tamaki | 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, Nobuyuki Kajimoto | 1988-10-04 |
| 4755616 | 4,4-bis(4-hydroxyphenyl)cyclohexanecarboxylic acid derivatives and process for preparing same | Tohru Miura | 1988-07-05 |
| 4755617 | Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid | Tohru Miura, Hideki Mizuta | 1988-07-05 |
| 4731453 | Process for producing 1, 3-dialkyl-2-imidazolidinone | Nobuyuki Kajimoto, Masaru Wada, Hideki Mizuta, Akihiro Tamaki | 1988-03-15 |
| 4724268 | Purification process of 3,3'-dinitrodiphenyl compounds | Keizaburo Yamaguchi, Kenichi Sugimoto, Yoshimitsu Tanabe, Akihiro Yamaguchi | 1988-02-09 |
| 4723046 | Process for the preparation of 4,4'-biphenol | Tohru Miura | 1988-02-02 |
| 4689387 | S-alkyl thiocarbamate base lens resin | Nobuyuki Kajimoto, Akihiro Tamaki | 1987-08-25 |
| 4680369 | Sulfur-containing polyurethane base lens resin | Nobuyuki Kajimoto, Akihiro Tamaki | 1987-07-14 |
| 4668793 | Process for producing 1,3-dimethyl-2-imidazolidinone | Nobuyuki Kajimoto, Masaru Wada, Hitoshi Nakayama, Tadao Yamada | 1987-05-26 |
| 4625062 | Process for producing 4-alkoxyanilines | Akihiro Tamaki, Hiroki Ohnishi, Hideki Mizuta | 1986-11-25 |
| 4542243 | Process for producing 3-phenoxybenzyl 2-(4-alkoxyphenyl)-2-methylpropyl ethers | Mitsumasa Umemoto, Tamotsu Asano, Satoshi Numata | 1985-09-17 |
| 4193932 | Process for preparing organic isocyanates | Ryuichi Yamamoto, Kousuke Yamamoto, Kenji C. Obata | 1980-03-18 |