Granted Patent
Utility
US 4,412,018 · App. 06/207,542
Organophilic clay complexes, their preparation and compositions comprising said complexes
Inventors:
Claude M. Finlayson, Wilbur Mardis
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Nov 17, 1980
Inventors
Claude M. Finlayson
Wilbur Mardis
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.