Granted Patent
Utility
US 4,659,571 · App. 06/713,897
Compressed powder formulation containing organophilic clay and a process for making the formulation
Inventor:
Dennis Laba
Patented Case
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Granted: Apr 21, 1987
Filed: Mar 20, 1985
Inventor
Dennis Laba
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.