Granted Patent
Utility
US 4,248,304 · App. 06/094,991
Large scale production of inexpensive flooding polymers for tertiary oil recovery
Inventor:
Kenneth G. Phillips
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Nov 16, 1979
Inventor
Kenneth G. Phillips
Assignee (at issue)
Nalco Chemical 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.