Granted Patent
Utility
US 5,587,011 · App. 08/419,069
Optically whitened clay pigments
Inventors:
Carl J. Marshall, Jr., Gary M. Freeman
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Apr 6, 1995
Inventors
Carl J. Marshall, Jr.
Gary M. Freeman
Assignee (at issue)
J.M. Huber Corporation
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.