Granted Patent
Utility
US 6,712,959 · App. 09/925,795
Submerged intake filter assembly
Inventors:
Michael Ekholm, Michael D. Appel, Richard C. Maxson
Patented Case
View Patent ↗
Granted: Mar 30, 2004
Filed: Aug 9, 2001
Inventors
Michael Ekholm
Michael D. Appel
Richard C. Maxson
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.