Granted Patent
Utility
US 4,312,743 · App. 06/179,908
FCC Process using catalyst produced from used FCC catalyst
Inventors:
Hosheng Tu, William D. Schlueter
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Aug 20, 1980
Inventors
Hosheng Tu
William D. Schlueter
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.