Granted Patent
Utility
US 6,491,105 · App. 09/803,635
Cross-over housing for gas lift valve
Inventor:
James Holt
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Mar 9, 2001
Inventor
James Holt
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.