Chemistry: analytical and immunological testing – Tracers or tags
Reexamination Certificate
2004-12-08
2009-12-15
Griffin, Walter D (Department: 1797)
Chemistry: analytical and immunological testing
Tracers or tags
Reexamination Certificate
active
07632682
ABSTRACT:
This invention relates to compositions of N,N′-dialkyleneoxy-substituted 1,4-diaminoanthraquinone colorants which contain a low percentage of impurities, to a process to make the compositions, and also to the use of the compositions thus prepared for coloring consumer products.
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Hong X. Michael
Mahaffey Robert L.
Stephens Eric B.
Vandahm Richard A.
Griffin Walter D
Milliken & Company
Ramdhanie Bobby
Wentz Brenda D
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