Granted Patent
Utility
US 4,782,166 · App. 07/039,573
Process for producing maleic anhydride utilizing a catalyst containing a siliceous metal-containing crystalline composition
Inventor:
Eric L. Moorehead
Patented Case
View Patent ↗
Granted: Nov 1, 1988
Filed: Apr 17, 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.