Granted Patent
Utility
US 4,293,387 · App. 06/198,035
Apparatus for the solvent extraction of aromatic hydrocarbons from a hydrocarbon mixture
Inventor:
George R. Winter, III
Patented Case
View Patent ↗
Granted: Oct 6, 1981
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.