Granted Patent
Utility
US 4,498,973 · App. 06/505,559
Multiple-stage catalytic reforming with gravity-flowing dissimilar catalyst particles
Inventors:
John G. Sikonia, Richard W. Bennett
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Jun 17, 1983
Inventors
John G. Sikonia
Richard W. Bennett
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.