Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8758595 | Process oil, process for production of deasphalted oil, process for production of extract, and process for production of process oil | Masashi Nakamura, Kazuhiro Teshima, Akihito Abe, Masami Takasaki | 2014-06-24 |
| 7972496 | Process oil, process for production of deasphalted oil, process for production of extract, and process for production of process oil | Masashi Nakamura, Kazuhiro Teshima, Akihito Abe, Masami Takasaki | 2011-07-05 |
| 6605695 | Process oil, process for producing the same and rubber composition | Masami Takasaki, Hisao Anzai, Masashi Nakamura, Chisato Endo | 2003-08-12 |
| 6410816 | Processing oil and method for producing the same | Masami Takasaki | 2002-06-25 |
| 6399697 | Process oil, process for producing the same and rubber composition | Masami Takasaki, Hisao Anzai, Masashi Nakamura, Chisato Endo | 2002-06-04 |
| 5851381 | Method of refining crude oil | Shuji Sugiyama | 1998-12-22 |