Granted Patent
Utility
US 4,758,328 · App. 06/801,591
Shock calcined aluminosilicate zeolites
Inventor:
Dean A. Young
Patented Case
View Patent ↗
Granted: Jul 19, 1988
Filed: Nov 25, 1985
Inventor
Dean A. Young
Assignee (at issue)
Union Oil Company of California
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.