Issued Patents All Time
Showing 51–73 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5466864 | Method for recovering L-phenylalanine | Toyoto Hijiya, Teruo Yonekawa, Chiaki Mochizuki | 1995-11-14 |
| 5432262 | Method of purifying .alpha.-L-aspartyl-L-phenylalanine methyl ester | Katsumi Sugiyama | 1995-07-11 |
| 5424476 | Method for preparing amino acid esters | Hideo Takeda | 1995-06-13 |
| 5420338 | Method for the production of .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride | Shinji Fujita | 1995-05-30 |
| 5391809 | Method for the production of .alpha.-L-aspartyl-L-phenylalanine methyl ester hydrochloride | Shinji Fujita | 1995-02-21 |
| 5358186 | Method of preparing granules of dipeptide | Takehiko Kataoka, Harutoshi Ohura, Makoto Nishikawa | 1994-10-25 |
| 5304671 | Method for recovery of .alpha.-L-aspartyl-L-phenylalanine methyl ester, L-phenylalanine and L-aspartic acid | Sou Abe, Shinichi Kishimoto, Toshihisa Kato, Satoshi Kumon | 1994-04-19 |
| 5294714 | 2,5-dioxopiperazine compounds and method for preparing .alpha.-aspartyl-L-phenylalanine methyl ester derivatives | Ryoichiro Nakamura | 1994-03-15 |
| 5292923 | Method of preparing .alpha.-l-aspartyl-l-phenylalanine methyl ester hydrochloride | Toshihisa Kato, Shinichi Kishimoto, Hideo Takeda, Mikiya Kano | 1994-03-08 |
| 5118840 | Method of crystallizing phenylalanine | Mikiya Kano, Shinji Fujita, Toshihisa Kato, Naoko Sugiyama | 1992-06-02 |
| 4942255 | Method for producing .alpha.-aspartylphenylalanine derivatives | Satoji Takahashi | 1990-07-17 |
| 4904802 | Imides | Satoji Takahashi | 1990-02-27 |
| 4897507 | Method for producing .alpha.-L-aspartyl-L-phenylalanine derivatives | Satoji Takahashi | 1990-01-30 |
| 4803300 | Process for separation of N-protected-.alpha.-L-aspartyl-L-phenylalanines | Toyoto Hijiya, Toshihide Yukawa | 1989-02-07 |
| 4789758 | Process for the production of an N-protected-L-.alpha.-aspartyl-L-phenylalanine | Toshihide Yukawa, Kunio Hisamitsu | 1988-12-06 |
| 4780528 | Tripeptides and sweetening agents containing the same | Toyoto Hijiya, Toshihide Yukawa | 1988-10-25 |
| 4740616 | Process for the production of an N-protected-L-.alpha.-aspartyl-L-phenylalanine | Toshihide Yukawa, Kunio Hisamitsu | 1988-04-26 |
| 4684745 | Process for producing .alpha.-L-aspartyl-L-phenylalanine methyl ester for its hydrochloride | Yasuo Ariyoshi | 1987-08-04 |
| 4680403 | Process for producing N-protected-.alpha.-L-aspartyl-L-phenylalanine methyl ester | Kunio Hisamitsu, Toyoto Hijiya, Satoji Takahashi | 1987-07-14 |
| 4673744 | Method for conversion of .beta.-aspartylphenylalanine derivatives to .alpha . | Toshihide Yukawa, Kunio Hisamitsu | 1987-06-16 |
| 4618695 | Method of preparing methyl ester and its hydrochloride | Yoichi Ozawa, Shinichi Kishimoto, Emiko Shinohara, Chikahiko Eguchi | 1986-10-21 |
| 4606854 | Method of preparing .alpha.-L-aspartyl-L-phenylalanine methyl ester and its hydrochloride | Yoichi Ozawa, Shinichi Kishimoto, Emiko Shinohara, Chikahiko Eguchi | 1986-08-19 |
| 4550180 | Method for manufacture of N-formylaspartic anhydride | Toyoto Hijiya, Tetsuo Yamatani | 1985-10-29 |