Granted Patent
Utility
US 4,711,869 · App. 06/796,136
Silica-titania hydrocarbon conversion catalyst
Inventors:
Leonard A. Cullo, Francis J. Shiring, III
Patented Case
View Patent ↗
Granted: Dec 8, 1987
Filed: Nov 8, 1985
Inventors
Leonard A. Cullo
Francis J. Shiring, III
Assignee (at issue)
Aristech Chemical 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.