Granted Patent
Utility
US 6,457,950 · App. 09/564,274
Sealless multiphase screw-pump-and-motor package
Inventors:
Paul V. Cooper, Allan J. Prang
Patented Case
View Patent ↗
Granted: Oct 1, 2002
Filed: May 4, 2000
Inventors
Paul V. Cooper
Allan J. Prang
Assignee (at issue)
Flowserve Management 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.