Quinacridone pigment compositions comprising unsymmetrically...

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...

Reexamination Certificate

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C106S031770, C106S497000, C430S105000, C430S108200, C546S049000, C546S056000

Reexamination Certificate

active

10890452

ABSTRACT:
The present invention relates to a novel quinacridone pigment compositions, a process using a mixed amine synthesis for the ultimate production of the compositions and to their use as colorants for pigmenting high molecular weight organic materials.

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R. H. Altiparmakian et al., Helvetica Chimica Acta, vol. 55, Fasc. 1, (1972), Nos. 11-12, pp. 85-100, no month.
W. Herbst et al. “Industrial Organic Pigments, Production, Properties, Applications” Second, Completely Revised Edition, 1997, p. 465, 3.2.4 Commercially Available Quinacridone Pigments, no month.

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