Granted Patent
Utility
US 4,919,907 · App. 07/274,621
Crystalline galliosilicate with the zeolite L type structure
Inventor:
Mario L. Occelli
Patented Case
View Patent ↗
Granted: Apr 24, 1990
Filed: Nov 22, 1988
Inventor
Mario L. Occelli
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.