Granted Patent
Utility
US 5,147,458 · App. 07/643,884
Structured pigment from high TiO.sub.2 /Fe.sub.2 O.sub.3 kaolinite reject material
Inventors:
Bobby R. Skipper, Robert E. Hardy, Albert C. Kunkle
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Jan 18, 1991
Inventors
Bobby R. Skipper
Robert E. Hardy
Albert C. Kunkle
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.