Granted Patent
Utility
US 5,152,906 · App. 07/792,143
Clay stabilizing composition for oil and gas well treatment
Inventors:
Carl Wilhelm Aften, Robert K. Gabel
Patented Case
View Patent ↗
Granted: Oct 6, 1992
Filed: Nov 12, 1991
Inventors
Carl Wilhelm Aften
Robert K. Gabel
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.