Granted Patent
Utility
US 4,288,418 · App. 06/202,039
Process for manufacturing titanium dioxide
Inventors:
Brian Davis, Joseph A. Rahm
Patented Case
View Patent ↗
Granted: Sep 8, 1981
Filed: Oct 29, 1980
Inventors
Brian Davis
Joseph A. Rahm
Assignee (at issue)
NL Industries, Inc.
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.