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Last Updated Friday, October 9 2015

Engelhard patents

Published August 11, 2005
Engelhard patents
effect pigment
Patent No. U.S. 6,572,695 B1
Engelhard Corporation has received a patent for an effect pigment which comprises bismuth oxychloride effect pigment crystals having a preformed carbon black particulate embedded at about the surface and containing a sufficient amount of at least one of aluminum and a rare earth metal to retard loss of the particulate from the pigmen

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