Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6124466 | Nitroisourea derivative | Hirozumi Matsuno, Kiyoshi Arai, Kenji Kodaka | 2000-09-26 |
| 5302743 | Preparation of N-protected .alpha.-L-aspartyl-L-phenylalanine methyl ester | Toshio Katoh, Chojiro Higuchi, Masanobu Ajioka, Akihiro Yamaguchi | 1994-04-12 |
| 5283357 | Separation method of .alpha.-l-aspartyl-l-phenylalanine methyl ester | Toshio Katoh, Chojiro Higuchi, Masanobu Ajioka, Akihiro Yamaguchi | 1994-02-01 |
| 5206413 | Method for preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester | Masanobu Ajioka, Chojiro Higuchi, Toshio Katoh, Akihiro Yamaguchi | 1993-04-27 |
| 5113009 | Preparation and isolation of mineral acid salt of an amino acid methyl ester | Masanobu Ajioka, Chojiro Higuchi, Toshio Katoh, Akihiro Yamaguchi | 1992-05-12 |
| 4962222 | Preparation process of .alpha.-l-aspartyl-l-phenylalanine methyl ester having low hygroscopicity | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi | 1990-10-09 |
| 4918216 | Preparation process of .alpha.-l-aspartyl-l-phenyl-alanine methyl ester or hydrohalide thereof | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi | 1990-04-17 |
| 4897506 | Isolation of alpha-l-aspartyl-l-phenylalanine methyl ester from aqueous medium | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi, Masanobu Ajioka | 1990-01-30 |
| 4801732 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester | Ryuichi Mita, Chojiro Higuchi, Toshio Katoh, Akihiro Yamaguchi | 1989-01-31 |
| 4780561 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi | 1988-10-25 |
| 4778916 | Preparation process of .alpha.-L-aspartyl-L-phenylalanine methyl ester or hydrochloride thereof | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi | 1988-10-18 |
| 4745210 | Preparation process of N-formyl-.alpha.-aspartyl phenylalanine | Ryuichi Mita, Toshio Katoh, Chojiro Higuchi, Akihiro Yamaguchi | 1988-05-17 |