Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Reexamination Certificate
2006-10-17
2006-10-17
Wilson, Donald L. (Department: 3653)
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
C106S486000, C106S488000, C209S005000, C209S007000, C501S148000
Reexamination Certificate
active
07122080
ABSTRACT:
The present invention provides an improved method of beneficiating and dewatering kaolin clays. The product of the improved process is a brightened, dewatered kaolin, suitable for use in pigments and paper coating compositions. The improved beneficiation process provides refined kaolin for pigments and other purposes of the same or better quality as prior art processes, but with the use of fewer steps and materials, at significant cost and environmental savings.
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Jessica Elzea Kogel et al., “Geology of the Commerial Kaolin Mining District of Central and Eastern Georgia,”Georgia Geological Society Guidebooks, vol. 20, No. 1, Oct. 2000, pp. 52-56.
Garska Michael J.
Golley Christopher R. L.
Pruett Robert J.
Yuan Jun
Finnegan Henderson Farabow Garrett & Dunner LLP
Imerys Pigments, Inc.
Kohner Matthew J.
Wilson Donald L.
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