Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrophotometer
Reexamination Certificate
2006-02-14
2006-02-14
StCyr, Daniel (Department: 2876)
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrophotometer
C356S326000
Reexamination Certificate
active
06999167
ABSTRACT:
An apparatus and a method for objectively ascertaining a color match between a selected standard color and the color exhibited by an interference effect pigment during processing thereof and terminating the process upon achieving a match. The invention provides a spectrophotometer attached to a flow cell to monitor the color of a platy effect pigment to monitor pigment color and ascertain completion of the coating reaction process involved in interference pigment production.
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Carroll, Jr. James B.
Willard Charles
Brown Melanie L.
Engelhard Corporation
StCyr Daniel
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