Granted Patent
Utility
US 4,822,592 · App. 07/153,419
Producing alpha alumina particles with pressurized acidic steam
Inventor:
Chanakya Misra
Patented Case
View Patent ↗
Granted: Apr 18, 1989
Filed: Feb 8, 1988
Inventor
Chanakya Misra
Assignee (at issue)
Aluminum Company of America
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.