Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...
Reexamination Certificate
2006-06-13
2006-06-13
Powers, Fiona T. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Heterocyclic carbon compounds containing a hetero ring...
C106S031770, C106S498000
Reexamination Certificate
active
07060835
ABSTRACT:
A process for preparing transparent Pigment Yellow 138 by grinding Pigment Yellow 138 in the presence of a grinding agent, preparing an aqueous slurry of the ground particles, and filtering the slurry resulting in a filter cake containing particles of transparent Pigment Yellow 138. In addition, a process for improving color strength of an ink and/or plastic composition is also disclosed by adding transparent Pigment Yellow 138 to the composition.
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English translation of JP 2002-105351 Apr. 10, 2002.
W. herbst, K. Hunger, Industrial Organic Pigments, pp. 549-550, no date available.
Chamberlain Terence R.
Clark Kimberly A.
Schwartz Russell J.
Smith Norman W.
Persley, Esq. Sidney
Powers Fiona T.
Sun Chemical Corporation
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