Granted Patent
Utility
US 4,828,813 · App. 07/054,110
Siliceous metal-containing crystalline compositions
Inventor:
Eric L. Moorehead
Patented Case
View Patent ↗
Granted: May 9, 1989
Filed: May 20, 1987
Inventor
Eric L. Moorehead
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.