Granted Patent
Utility
US 4,384,949 · App. 06/257,849
Pretreating hydrocarbon feed stocks using deactivated FCC catalyst
Inventors:
William J. Reagan, John W. Byrne, Francis L. Himpsl
Patented Case
View Patent ↗
Granted: May 24, 1983
Filed: Apr 27, 1981
Inventors
William J. Reagan
John W. Byrne
Francis L. Himpsl
Assignee (at issue)
Engelhard Minerals & Chemicals Corporation
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.