Patents

Engelhard patents Carbon

October 18, 2007

Patent No. U.S. 7,189,454 B2
Engelhard has been granted a patent for a pigment comprised of an effect pigment substrate having a pyrolyzed carbon-containing organic coating thereon, the organic coating is comprised of at least one carbon-containing ionic polymer species and the pyrolyzed carbon-containing organic coating contains below four percent weight nitrogen.

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