Granted Patent
Utility
US 4,985,384 · App. 06/899,572
Cracking catalysts having aromatic selectivity
Inventor:
Jean-Pierre Gilson
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Aug 25, 1986
Inventor
Jean-Pierre Gilson
Assignee (at issue)
W.R. Grace & Co. Conn.
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.