Granted Patent
Utility
US 4,362,652 · App. 06/281,403
Cracking catalysts containing silica-alumina gels
Inventors:
Dennis Stamires, Hamid Alafandi
Patented Case
View Patent ↗
Granted: Dec 7, 1982
Filed: Jul 8, 1981
Inventors
Dennis Stamires
Hamid Alafandi
Assignee (at issue)
Filtrol 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.