Granted Patent
Utility
US 4,257,875 · App. 06/043,527
Fluid catalytic cracking process
Inventors:
Robert A. Lengemann, Gregory J. Thompson, Anthony G. Vickers
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: May 29, 1979
Inventors
Robert A. Lengemann
Gregory J. Thompson
Anthony G. Vickers
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.