Granted Patent
Utility
US 4,853,111 · App. 06/889,587
Two-stage co-processing of coal/oil feedstocks
Inventors:
James B. MacArthur, Joseph B. McLean, Alfred G. Comolli
Patented Case
View Patent ↗
Granted: Aug 1, 1989
Filed: Jul 25, 1986
Inventors
James B. MacArthur
Joseph B. McLean
Alfred G. Comolli
Assignee (at issue)
HRI
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.