Granted Patent
Utility
US 4,315,801 · App. 06/198,036
Apparatus for the solvent extraction of aromatic hydrocarbons from a hydrocarbon mixture
Inventor:
George R. Winter, III
Patented Case
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Granted: Feb 16, 1982
Filed: Oct 17, 1980
Inventor
George R. Winter, III
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.