Granted Patent
Utility
US 6,663,774 · App. 09/978,840
Centrifuge screen
Inventors:
Chuck Flansburg, Pierre Ducloux, Michael D. Appel
Patented Case
View Patent ↗
Granted: Dec 16, 2003
Filed: Oct 16, 2001
Inventors
Chuck Flansburg
Pierre Ducloux
Michael D. Appel
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.