Granted Patent
Utility
US 6,779,608 · App. 09/826,409
Surface pump assembly
Inventors:
William A. Grubb, Robert DeLong
Patented Case
View Patent ↗
Granted: Aug 24, 2004
Filed: Apr 4, 2001
Inventors
William A. Grubb
Robert DeLong
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.