Granted Patent
Utility
US 4,046,676 · App. 05/679,273
Aromatic hydrocarbon separation via solvent extraction
Inventor:
George F. Asselin
Patented Case
View Patent ↗
Granted: Sep 6, 1977
Filed: Apr 22, 1976
Inventor
George F. Asselin
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.