Granted Patent
Utility
US 4,610,776 · App. 06/754,718
Coal liquefaction process
Inventors:
Peter Urban, Lee Hilfman
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Jul 15, 1985
Inventors
Peter Urban
Lee Hilfman
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.