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Inventor
VELASQUEZ HUMBERTO
US
2 patents
Patents
2 patents
US6402829B1
Jun 11, 2002
Process for preparing a substantially pure gamma phase quinacridone pigment of large particle size
SUN CHEMICAL CORP
0 citations
45
US6537362B1
Mar 25, 2003
Polyphosphoric acid swelling of organic pigments
SUN CHEMICAL CORP
0 citations
39