Granted Patent
Utility
US 4,294,803 · App. 06/068,452
Apparatus for preventing coking in fluidized bed reactor for cracking heavy hydrocarbon oil
Inventors:
Seiichi Uchida, Yoshihito Satomi, Norihiro Kiuchi, Takeo Yamagata, Susumu Yoshioka, Tomohiko Miyamoto, Jinichi Tomuro
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Aug 21, 1979
Inventors
Seiichi Uchida
Yoshihito Satomi
Norihiro Kiuchi
Takeo Yamagata
Susumu Yoshioka
Tomohiko Miyamoto
Jinichi Tomuro
Assignees (at issue)
HITACHI, LTD.
Nippon Mining Company Limited
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.