Granted Patent
Utility
US 4,405,447 · App. 06/358,074
Method for the removal of metal from a hydrocarbon solution containing metal alkaryl sulfonate
Inventors:
Lee Hilfman, John G. Gatsis
Patented Case
View Patent ↗
Granted: Sep 20, 1983
Filed: Mar 15, 1982
Inventors
Lee Hilfman
John G. Gatsis
Assignee (at issue)
UOP LLC
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.