Granted Patent
Utility
US 4,318,896 · App. 06/255,917
Manufacture of alumina particles
Inventor:
Michael W. Schoonover
Patented Case
View Patent ↗
Granted: Mar 9, 1982
Filed: Apr 20, 1981
Inventor
Michael W. Schoonover
Assignee (at issue)
UOP LLC
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.