Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6657041 | Production process of polysuccinimide | Katsuhiko Machida, Susumu Fukawa, Shinji Ogawa, Makoto Sukegawa, Yoshihiro Irizato | 2003-12-02 |
| 6346569 | Production process of cross-linked polysuccinimide resin | Yoshihiro Irizato, Makoto Sukegawa, Hiroaki Tamatani, Akinori Nagatomo, Masaru Wada | 2002-02-12 |
| 6072024 | Production process of cross-linked polyaspartic acid resin | Yoshihiro Irizato, Makoto Sukegawa, Hiroaki Tamatani, Akinori Nagatomo, Masaru Wada | 2000-06-06 |
| 5986042 | Cross-linked polymer | Yoshihiro Irizato, Makoto Sukegawa, Hiroaki Tamatani | 1999-11-16 |
| 5571889 | Polymer containing monomer units of chemically modified polyaspartic acids or their salts and process for preparing the same | Akinori Nagatomo, Hiroaki Tamatani, Masanobu Ajioka, Akihiro Yamaguchi | 1996-11-05 |
| 5302743 | Preparation of N-protected .alpha.-L-aspartyl-L-phenylalanine methyl ester | Chojiro Higuchi, Takeshi Oura, Masanobu Ajioka, Akihiro Yamaguchi | 1994-04-12 |
| 5283357 | Separation method of .alpha.-l-aspartyl-l-phenylalanine methyl ester | Chojiro Higuchi, Takeshi Oura, Masanobu Ajioka, Akihiro Yamaguchi | 1994-02-01 |
| 5206413 | Method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester | Masanobu Ajioka, Takeshi Oura, Chojiro Higuchi, Akihiro Yamaguchi | 1993-04-27 |
| 5113009 | Preparation and isolation of mineral acid salt of an amino acid methyl ester | Masanobu Ajioka, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi | 1992-05-12 |
| 4962222 | Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl ester having low hygroscopicity | Ryuichi Mita, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi | 1990-10-09 |
| 4918216 | Preparation process of .alpha.-l-aspartyl-l-phenyl-alanine methyl ester or hydrohalide thereof | Ryuichi Mita, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi | 1990-04-17 |
| 4897506 | Isolation of alpha-l-aspartyl-l-phenylalanine methyl ester from aqueous medium | Ryuichi Mita, Takeshi Oura, Chojiro Higuchi, Akihiro Yamaguchi, Masanobu Ajioka | 1990-01-30 |
| 4801732 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester | Ryuichi Mita, Takeshi Oura, Chojiro Higuchi, Akihiro Yamaguchi | 1989-01-31 |
| 4780561 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Takeshi Oura, Chojiro Higuchi, Akihiro Yamaguchi | 1988-10-25 |
| 4778916 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi | 1988-10-18 |
| 4745210 | Preparation process of N-formyl-.alpha.-aspartyl phenylalanine | Ryuichi Mita, Chojiro Higuchi, Takeshi Oura, Akihiro Yamaguchi | 1988-05-17 |
| 4675439 | Preparation process of N-acylphenylalanines | Ryuichi Mita, Chojiro Higuchi, Akihiro Yamaguchi | 1987-06-23 |
| 4612388 | Process for producing N-acylphenylalanines | Ryuichi Mita, Chojiro Higuchi, Akihiro Yamaguchi | 1986-09-16 |
| 4605759 | Process for production of .beta.-phenylserine | Ryuichi Mita, Chojiro Higuchi, Akihiro Yamaguchi | 1986-08-12 |
| 4484003 | Preparation process of .beta.-chloroalanine | Masaharu Ohoka, Ryuichi Mita, Nobuyuki Kawashima, Chojiro Higuchi, Nobuhiro Kawashima +3 more | 1984-11-20 |
| 4453008 | Production process of DL-cystein | Ryuichi Mita, Masaharu Ohoka, Chojiro Higuchi, Nobuyuki Kawashima, Akihiro Yamaguchi +2 more | 1984-06-05 |
| 4239998 | Method for electrically insulating an electrically conducting article and product produced thereby | Takeshi Hakamada, Hideyo Hirata | 1980-12-16 |