Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4456553 | Vitamin D.sub.3 derivatives, process for preparation thereof, and antigens comprising said derivatives to be used for preparation of antibodies for immunochemical assay and antibodies prepared therefrom | Jun-ichi Oshida, Osamu Nishikawa, Toru Takeshita, Itaru Yamamoto, Kenji Ishimaru | 1984-06-26 |
| 4388243 | Process for the preparation of active-type vitamin D.sub.3 compounds | Osamu Nishikawa, Kenji Ishimaru, Toru Takeshita | 1983-06-14 |
| 4298537 | Process for producing steroid compounds having an oxo group in the side chain | Osamu Nishikawa, Kenji Ishimaru, Toru Takeshita | 1981-11-03 |
| 4292249 | 25-Hydroxy-24-oxocholestane derivatives and preparation thereof | Osamu Nishikawa, Kenji Ishimaru, Toru Takeshita | 1981-09-29 |