Granted Patent
Utility
US 4,544,796 · App. 06/630,909
Solvent extraction of aromatic compounds using alkylsulfoxide solvents
Inventors:
Paul R. Kurek, Dusan J. Engel, Richard L. Fergin
Patented Case
View Patent ↗
Granted: Oct 1, 1985
Filed: Jul 13, 1984
Inventors
Paul R. Kurek
Dusan J. Engel
Richard L. Fergin
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.