Granted Patent
Utility
US 6,547,005 · App. 09/790,495
System and a method of extracting oil
Inventor:
Svein Haheim
Patented Case
View Patent ↗
Granted: Apr 15, 2003
Filed: Feb 23, 2001
Inventor
Svein Haheim
Assignee (at issue)
ABB RESEARCH LTD.
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.