Granted Patent
Utility
US 4,865,632 · App. 07/253,908
Integrated separator for solid and gaseous contaminants in a fluid
Inventors:
Hisashi Yano, Hiroyuki Ihara, Junsuke Yabumoto
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Oct 6, 1988
Inventors
Hisashi Yano
Hiroyuki Ihara
Junsuke Yabumoto
Assignee (at issue)
Mitsubishi Oil Co., Ltd.
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.