Granted Patent
Utility
US 4,878,539 · App. 07/227,197
Method and system for maintaining and producing horizontal well bores
Inventor:
Edward O. Anders
Patented Case
View Patent ↗
Granted: Nov 7, 1989
Filed: Aug 2, 1988
Inventor
Edward O. Anders
Assignee (at issue)
Anders Energy Corporation
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.