Assignee
- Mitsubishi Chemical
- Kobe Steel
- Idemitsu Kosan Co.
- Asia Oil Company Limited
- Nippon Brown Coal Liquefaction Co.
Inventors
- Nobuyoshi Hirokoh (2 patents)
- Unknown
- Yukio Nakako (8 patents)
- Tetsuo Matsumura (34 patents)
US Patent 4818374 · Granted Apr 4, 1989