Granted Patent
Utility
US 5,209,765 · App. 07/697,148
Centrifugal separator systems for multi-phase fluids
Inventors:
Miroslav M. Kolpak, Steven G. Petermann
Patented Case
View Patent ↗
Granted: May 11, 1993
Filed: May 8, 1991
Inventors
Miroslav M. Kolpak
Steven G. Petermann
Assignee (at issue)
Atlantic Richfield Company
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.