Granted Patent
Utility
US 4,946,814 · App. 07/321,355
Process for improving the physical and catalytic properties of fluid cracking catalysts
Inventors:
Joseph C. S. Shi, Edwin W. Albers, Geoffrey R. Wilson
Patented Case
View Patent ↗
Granted: Aug 7, 1990
Filed: Mar 10, 1989
Inventors
Joseph C. S. Shi
Edwin W. Albers
Geoffrey R. Wilson
Assignee (at issue)
Thiele Kaolin 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.