Granted Patent
Utility
US 6,280,157 · App. 09/342,588
Sealless integral-motor pump with regenerative impeller disk
Inventor:
Paul V. Cooper
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Jun 29, 1999
Inventor
Paul V. Cooper
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.