Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8536385 | Process for preparing dimethyl ether and process for preparing a mixture of dimethyl ether and methanol | Keiichi Okuyama, Yotaro Ohno, Takashi Ogawa, Tsutomu Shikada, Yasuhiro Mogi +4 more | 2013-09-17 |
| 7015255 | Medium oil for slurry-bed reaction process and process of producing dimethyl ether | Keiji Tomura, Takashi Ogawa, Masami Ono, Keiichi Okuyama, Tsutomu Shikada +2 more | 2006-03-21 |
| 6150566 | Separation and purification method of xylenol isomer | Tetsuo Hachiya | 2000-11-21 |
| 5414191 | Method of removing alkyltetralins from an alkylbenzene mixture | Tomonori Kato, Hiroaki Taniguchi, Hidetosi Morotomi, Masami Ono | 1995-05-09 |
| 5177066 | Stabilization of compositions containing anionic surfactants | Yoshiyuki Shimohiro, Masazo Ogawa | 1993-01-05 |