Granted Patent
Utility
US 6,318,480 · App. 09/461,306
Drilling of laterals from a wellbore
Inventor:
David D. Hearn
Patented Case
View Patent ↗
Granted: Nov 20, 2001
Filed: Dec 15, 1999
Inventor
David D. Hearn
Assignee (at issue)
Atlantic Richfield 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.