Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE38435 | Separating agent | Yoshio Okamoto, Tohru Shibata, Ichiro Okamoto, Hiroyuki Nakamura | 2004-02-24 |
| RE34457 | Separating agent | Yoshio Okamoto, Tohru Shibata, Ichiro Okamoto, Hiroyuki Nakamura | 1993-11-30 |
| 5202433 | Polysaccharide derivatives as separating agents | Yoshio Okamoto | 1993-04-13 |
| 5135653 | Optical resolution with .beta.-1,4-xylan dibenzoate | Yoshio Okamoto, Tohru Shibata, Hajime Namikoshi, Ichiro Okamoto | 1992-08-04 |
| 5032277 | Optical resolution with .beta.-1,4-mannan tribenzoate | Yoshio Okamoto, Tohru Shibata, Hajime Namikoshi, Ichiro Okamoto | 1991-07-16 |
| 4931184 | Optical resolution with tribenzoyl-b-1,4-chitosan | Yoshio Okamoto, Tohru Shibata, Hajime Namikoshi, Ichiro Okamoto | 1990-06-05 |
| 4912205 | Alkyl-substituted phenylcarbamate derivative of polysaccharide | Yoshio Okamoto | 1990-03-27 |
| 4861872 | Alkyl-phenylcarbamate derivative of polysaccharide | Yoshio Okamoto | 1989-08-29 |
| 4818394 | Separating agent | Yoshio Okamoto, Tohru Shibata, Ichiro Okamoto, Hiroyuki Nakamura | 1989-04-04 |
| 4619970 | Separation agent | Yoshio Okamoto | 1986-10-28 |
| 4559389 | Graft copolymers, process for the preparation thereof and ionizing radiation sensitive resist using such copolymers | Yoshio Okamoto, Tatsuki Kitayama | 1985-12-17 |
| 4523000 | Copolymers, process for the preparation thereof and ionizing radiation sensitive resist using such copolymers | Yoshio Okamoto, Tatsuki Kitayama | 1985-06-11 |