Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886891 | Process for preparing 1,1-disubstituted ethylene derivative by reaction of lead with a carbinol derivative | Shigeru Torii, Masatoshi Taniguchi, Yoshihisa Tomotaki, Mitsuo Akada, Hideo Tanaka +2 more | 1989-12-12 |
| 4853468 | Process for the preparation of cephem derivatives | Sigeru Torii, Kenji Uneyama, Hideo Tanaka, Junzo Nokami, Norio Saito +1 more | 1989-08-01 |
| 4810788 | Azetidinone disulfide derivatives and a process for preparing the same | Sigeru Torii, Hideo Tanaka, Junzo Nokami, Norio Saito, Takashi Siroi | 1989-03-07 |
| 4801720 | Azetidinone disulfides and a ring opening process for preparing the same | Sigeru Torii, Hideo Tanaka, Junzo Nokami, Norio Saito, Takashi Siroi | 1989-01-31 |
| 4798890 | Process for preparation of azetidinone derivatives | Sigeru Torii, Hideo Tanaka, Takashi Shiroi | 1989-01-17 |