Granted Patent
Utility
US 6,660,899 · App. 09/783,705
Methods for enhanced aromatic extraction employing sulfone-sulfoxide compositions
Inventors:
Artie S. McKim, George Kvakovszky, Michael D. Donahue
Patented Case
View Patent ↗
Granted: Dec 9, 2003
Filed: Feb 14, 2001
Inventors
Artie S. McKim
George Kvakovszky
Michael D. Donahue
Assignee (at issue)
Gaylord Chemical Company 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.