Granted Patent
Utility
US 5,378,349 · App. 08/067,754
Passivated catalysts for cracking process
Inventor:
Dwayne R. Senn
Patented Case
View Patent ↗
Granted: Jan 3, 1995
Filed: May 26, 1993
Inventor
Dwayne R. Senn
Assignee (at issue)
Phillips Petroleum Company
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.