Granted Patent
Utility
US 4,695,402 · App. 06/767,599
Organophilic clay gellants and process for preparation
Inventors:
Claude M. Finlayson, Charles A. Cody, Steven J. Kemnetz, William W. Reichert, Edward D. Magauran, Johnny R. Johnson
Patented Case
View Patent ↗
Granted: Sep 22, 1987
Filed: Aug 20, 1985
Inventors
Claude M. Finlayson
Charles A. Cody
Steven J. Kemnetz
William W. Reichert
Edward D. Magauran
Johnny R. Johnson
Assignee (at issue)
NL Chemicals, 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.