Granted Patent
Utility
US 6,592,334 · App. 10/036,737
Hydraulic multiphase pump
Inventor:
Bryan V. Butler
Patented Case
View Patent ↗
Granted: Jul 15, 2003
Filed: Dec 21, 2001
Inventor
Bryan V. Butler
Assignee (at issue)
Weatherford/Lamb, 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.