Optics: measuring and testing – Sample – specimen – or standard holder or support – Fluid containers
Reexamination Certificate
2006-04-11
2006-04-11
Lauchman, Layla G. (Department: 2877)
Optics: measuring and testing
Sample, specimen, or standard holder or support
Fluid containers
C356S410000
Reexamination Certificate
active
07027147
ABSTRACT:
An apparatus for inspection of fluids, particularly dispersions and tints, having a fluid analysis cell with a cavity enclosed by two light transmitting windows and having a spacer member fixedly positioned therebetween which provides a fluid analysis chamber of fixed pathlength where fluid flows by the windows and wherein the flow is laminar and at a uniform shear to provide accurate color measurements. The apparatus is particularly useful in the manufacture of dispersions and tints used in the manufacture of paints, so that the color of material being made can be accurately matched to a standard color in the wet state with confidence that the color will match in the dry state.
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Martino Anthony Joseph
Steenhoek Larry Eugene
E. I. duPont de Nemours and Company
Lauchman Layla G.
Sebree Chyrrea J.
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