Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822907 | Method for recovering .alpha.-L-aspartyl-L-phenylalanine methyl ester | Katsumi Sugiyama, Takashi Yamashita | 1989-04-18 |
| 4820861 | Process for the production of N-formyl-alpha-L-aspartyl-L-phenylalanine methyl ester | Haruo Kawasaki, Masao Nakamura, Takashi Yamashita, Toshiaki Tsuji | 1989-04-11 |
| 4803300 | Process for separation of N-protected-.alpha.-L-aspartyl-L-phenylalanines | Toyoto Hijiya, Tadashi Takemoto | 1989-02-07 |