Granted Patent
Utility
US 4,915,930 · App. 07/275,683
Process for producing aluminum hydroxide of improved whiteness
Inventors:
Richard H. Goheen, William A. Nigro, Paul J. The
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Nov 23, 1988
Inventors
Richard H. Goheen
William A. Nigro
Paul J. The
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.