Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6974881 | Production method of 4,6-diaminoresorcin | Yukihiro Kumamoto, Masahiko Kusumoto, Hisato Itou, Masazumi Takaoka | 2005-12-13 |
| 6828461 | Process for producing 1,5-diaminonaphthalene | Yukihiro Kumamoto, Masazumi Takaoka, Yoriaki Matsuzaki | 2004-12-07 |
| 6359180 | Production method of 4,6-diaminoresorcin | Yukihiro Kumamoto, Masahiko Kusumoto, Hisato Itou, Masazumi Takaoka | 2002-03-19 |
| 6242651 | Process for the preparation of N,N'-dialkylalkanediamines | Yasuhiro Takano, Kaoru Sakadera, Jyoji Morisaki, Kunihiro Yamada, Hisato Itoh | 2001-06-05 |
| 5872260 | High purity 1,3-dialkyl-2-imidazolidinone and preparation process of same | Masazumi Takaoka, Teruyuki Nagata | 1999-02-16 |
| 5750779 | Preparation process of acyl halide or sulfonyl halide | Teruyuki Nagata, Hidetoshi Hayashi | 1998-05-12 |
| 5719256 | Process for preparing polycondensation polymer compound | Shoji Tamai, Yukiko Mori, Kenichi Goto, Katsuji Watanabe, Osamu Kohgo +5 more | 1998-02-17 |
| 5594149 | Process for producing 1,3-dialkyl-2-imidazolidinone | Hiroshi Naruse, Shinichi Umeda, Teruyuki Nagata | 1997-01-14 |
| 5583256 | Process for producing 1,3-dialkyl-2-imidazolidinone | Hiroshi Naruse, Shinichi Umeda, Teruyuki Nagata | 1996-12-10 |
| 5514793 | 1,3,6-trialkylhexahydro-1,3,6-triazocine-2-on and preparation process thereof | Hiroshi Naruse, Shinichi Umeda, Teruyuki Nagata | 1996-05-07 |
| 5136086 | Preparation process of aliphatic isocyanate | Teruyuki Nagata, Masaru Wada | 1992-08-04 |
| 4785132 | Process for preparing cyclohexanonecarboxylic acid compounds | Tohru Miura, Teruyuki Nagata | 1988-11-15 |
| 4755617 | Process for the preparation of 4'-hydroxybiphenyl-4-carboxyl acid | Tohru Miura, Teruyuki Nagata | 1988-07-05 |
| 4731453 | Process for producing 1, 3-dialkyl-2-imidazolidinone | Teruyuki Nagata, Nobuyuki Kajimoto, Masaru Wada, Akihiro Tamaki | 1988-03-15 |
| 4625062 | Process for producing 4-alkoxyanilines | Teruyuki Nagata, Akihiro Tamaki, Hiroki Ohnishi | 1986-11-25 |