Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Reexamination Certificate
2006-03-21
2006-03-21
Koslow, C. Melissa (Department: 1755)
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
C106S480000, C423S600000, C524S398000, C524S399000, C524S415000, C524S567000
Reexamination Certificate
active
07014701
ABSTRACT:
The present invention provides inorganic pigments including cobalt and aluminum having the spinel crystalline structure that exhibit improved color and/or weatherability in paint and polymer applications. Inorganic pigments according to the invention are formed by adding small quantities of a phosphate compound such as aluminum phosphate and, optionally, chromium (III) oxide, to a raw batch that includes a mixture of cobalt-containing and aluminum-containing inorganic pigment precursors, and calcining the raw batch to obtain the inorganic pigment.
REFERENCES:
patent: 4696700 (1987-09-01), Fischer et al.
Burkhart, III Gilbert B.
Detrie Terry J.
Stewart Kimberly Ann
Swiler Daniel R.
Ferro Corporation
Koslow C. Melissa
Manlove Shalie A.
Rankin, Hill Porter & Clark LLP
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