Granted Patent
Utility
US 6,190,542 · App. 09/241,505
Catalytic multi-stage process for hydroconversion and refining hydrocarbon feeds
Inventors:
Alfred G. Comolli, Lap-Keung Lee
Patented Case
View Patent ↗
Granted: Feb 20, 2001
Filed: Feb 1, 1999
Inventors
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.