Granted Patent
Utility
US 4,265,673 · App. 06/050,322
Polymer solutions for use in oil recovery containing a complexing agent for multivalentions
Inventors:
Gary W. Pace, Trevor J. Holding
Patented Case
View Patent ↗
Granted: May 5, 1981
Filed: Jun 20, 1979
Inventors
Gary W. Pace
Trevor J. Holding
Assignee (at issue)
Talres Development (N.A.) N.V.
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.