Granted Patent
Utility
US 4,283,316 · App. 06/186,790
Surface modification of alumina hydrate with liquid fatty acids
Inventor:
Patrick V. Bonsignore
Patented Case
View Patent ↗
Granted: Aug 11, 1981
Filed: Sep 12, 1980
Inventor
Patrick V. Bonsignore
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.