Granted Patent
Utility
US 5,872,875 · App. 08/988,845
Hydrodynamic shaft bearing with concentric outer hydrostatic bearing
Inventors:
John D. Halloran, Robert M. Kolodziej, Gerald K. Mruk
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Dec 11, 1997
Inventors
John D. Halloran
Robert M. Kolodziej
Gerald K. Mruk
Assignee (at issue)
Cooper Cameron Corporation
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.