Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6008403 | Method for producing optically active amino acid of derivative thereof having high optical purity | Kimio Katsuura, Akira Tokuda | 1999-12-28 |
| 5693485 | Enzymatic coupling reaction of N-protected-L-aspartic acid and phenylalanine methyl ester | Tsuneo Harada, Yukio Kunisawa, Kiyotaka Oyama | 1997-12-02 |
| 5527689 | Enzymatic coupling of L-phenylalanine methyl ester and N-benzyloxycarbonyl-aspartic acid | Shin Nakamura, Kiyotaka Oyama, Peter Jan Leonard Mario Quaedflieg, Theodorus Johannes Godfried Maria Van Dooren | 1996-06-18 |
| 4835301 | Process for producing stable .alpha.-L-aspartyl-L-phenylalanine methyl ester | Hidetoshi Wakamatsu, Tsuneo Harada, Akira Tokuda, Kiyotaka Oyama | 1989-05-30 |
| 4835303 | Process for producing dry .alpha.-L-aspartyl-L-phenylalanine methyl ester | Hideotoshi Wakamatsu, Tsuneo Harada, Akira Tokuda, Kiyotaka Oyama | 1989-05-30 |
| 4831180 | Process for producing alpha-L-aspartyl-L-phenylalanine methyl ester having an improved solubility | Hidetoshi Wakamatsu, Tsuneo Harada, Akira Tokuda, Hiyotaka Oyama | 1989-05-16 |
| 4810818 | Process for producing alpha-aspartyl-l-phenylalanine methyl ester having an improved solubility | Hidetoshi Wakamatsu, Tsuneo Harada, Akira Tokuda, Kiyotaka Oyama | 1989-03-07 |
| 4521514 | Process for producing an addition compound of a dipeptide ester and an amino acid ester | Kiyotaka Oyama, Tsuneo Harada, Masao Nakamura | 1985-06-04 |
| 4487717 | Process for recovering a dipeptide derivative | Kiyotaka Oyama, Norio Hagi | 1984-12-11 |