Granted Patent
Utility
US 4,591,576 · App. 06/659,641
Process for preparing catalytic cracking catalysts
Inventors:
Robert L. Chiang, Raymond G. Perigard, Jule A. Rabo
Patented Case
View Patent ↗
Granted: May 27, 1986
Filed: Oct 3, 1984
Inventors
Robert L. Chiang
Raymond G. Perigard
Jule A. Rabo
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.