Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855037 | Hydrogenation catalyst for coal tar, a method of hydrogenation of coal tar with use of such catalyst, and a method of producing super needle coke from the hydrogenation product of coal tar | Tadashi Murakami, Yoshio Nakayama, Mitsuaki Masuo | 1989-08-08 |
| 4814063 | Process for the preparation of super needle coke | Tadashi Murakami, Yoshio Nakayama | 1989-03-21 |