Granted Patent
Utility
US 4,501,655 · App. 06/595,113
Hydrocracking process
Inventors:
Lee Hilfman, Mark J. O'Hara
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Mar 30, 1984
Inventors
Lee Hilfman
Mark J. O'Hara
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.