Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5531885 | Hydroconversion process for heavy hydrocarbon oil | Yoshihiro Mizutani, Yasuo Yamamoto, Yukio Shibata, Hatsutaro Yamazaki | 1996-07-02 |
| 5002919 | Catalyst composition for hydrogenation of heavy hydrocarbon oil and process for producing the catalyst | Hatsutaro Yamazaki, Kazushi Usui, Tomohiro Yoshinari, Takuo Suzuki | 1991-03-26 |
| 4732886 | Hydrogen treating catalyst for hydrodesulfurization-cracking of mineral oil | Mitsugu Yumoto, Kinya Tawara | 1988-03-22 |