Granted Patent
Utility
US 4,337,018 · App. 06/116,636
Rotary impeller pump or motor with counterbalancing chamber in thrust plate bearing counterbore
Inventors:
Carl M. Singer, Mateiu J. Oana, John D. Turko
Patented Case
View Patent ↗
Granted: Jun 29, 1982
Filed: Jan 29, 1980
Inventors
Carl M. Singer
Mateiu J. Oana
John D. Turko
Assignee (at issue)
Commercial Shearing, Inc.
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.