Granted Patent
Utility
US 4,736,795 · App. 07/029,828
Composition and process for enhanced oil recovery
Inventor:
Lawrence J. Karas
Patented Case
View Patent ↗
Granted: Apr 12, 1988
Filed: Mar 24, 1987
Inventor
Lawrence J. Karas
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.