Granted Patent
Utility
US 5,947,200 · App. 08/936,908
Method for fracturing different zones from a single wellbore
Inventor:
Carl T. Montgomery
Patented Case
View Patent ↗
Granted: Sep 7, 1999
Filed: Sep 25, 1997
Inventor
Carl T. Montgomery
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.