Granted Patent
Utility
US 6,139,723 · App. 09/238,310
Iron-based ionic liquid catalysts for hydroprocessing carbonaceous feeds
Inventors:
Bruce P. Pelrine, Alfred G. Comolli, Lap-Keung Lee
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Jan 28, 1999
Inventors
Bruce P. Pelrine
Alfred G. Comolli
Lap-Keung Lee
Assignee (at issue)
Hydrocarbon Technologies
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.