Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...
Reexamination Certificate
2008-09-02
2008-09-02
Green, Anthony J (Department: 1793)
Compositions: coating or plastic
Materials or ingredients
Pigment, filler, or aggregate compositions, e.g., stone,...
C106S031770, C106S495000, C524S090000, C544S049000, C544S056000
Reexamination Certificate
active
11488875
ABSTRACT:
The invention is directed to a method or use of 2,9-dichloro-quinacridone as an alpha crystal phase inhibitor and optionally, 4,11-dichloroquinacridone during the beta-quinacridone or gamma-quinacridone crude pigment particle size reduction processes. The invention is also directed to solid solutions of quinacridone comprising about 98 to about 80 weight % gamma or beta-quinacridone, about 0.1 to about 10 weight % 2,9-dichloroquinacridone and about 0.1 to about 10 weight % 4,11-dichloroquinacridone.
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English language abstract for JP 55089366 (1980), no month.
R. B. McKay, JOCCA, “Control of the Application Performance of Classical Organic Pigments”, pp. 89-93, (1989), no month.
Campbell Colin Dennis
Carter Rhonda
Gerzevske Kevin Rodney
He Yingxia
Schilling Gordian
Ciba Specialty Chemicals Corporation
Green Anthony J
Loggins Shiela A.
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