Granted Patent
Utility
US 4,687,754 · App. 06/657,417
Catalytic cracking catalysts and process
Inventors:
Regis J. Pellet, Donald F. Best, Gary N. Long, Jule A. Rabo, Edward T. Wolynic
Patented Case
View Patent ↗
Granted: Aug 18, 1987
Filed: Oct 3, 1984
Inventors
Regis J. Pellet
Donald F. Best
Gary N. Long
Jule A. Rabo
Edward T. Wolynic
Assignee (at issue)
Union Carbide 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.