Colloid systems and wetting agents; subcombinations thereof; pro – Continuous liquid or supercritical phase: colloid systems;... – Primarily organic continuous liquid phase
Reexamination Certificate
2004-12-01
2011-10-18
Metzmaier, Daniel S (Department: 1762)
Colloid systems and wetting agents; subcombinations thereof; pro
Continuous liquid or supercritical phase: colloid systems;...
Primarily organic continuous liquid phase
C516S034000, C516S022000, C528S010000, C528S020000, C528S025000, C524S588000
Reexamination Certificate
active
08039517
ABSTRACT:
A method of preparing an organic sol of particles is provided. Steps include:a) providing a suspension of particles in an aqueous medium;b) adding an organic liquid to form an admixture where the concentration of particles in the admixture is less than or equal to 40 percent by weight;c) maintaining the admixture at a temperature and pressure and for a time sufficient to reduce the water content to less than 30 percent by weight while simultaneously adding a water-compatible organic liquid at a rate sufficient to maintain a concentration of particles in the admixture at less than or equal to 50 percent by weight; andd) adding at least one polymer while maintaining the admixture at a temperature and pressure and for a time sufficient to provide an organic sol of particles comprising 1 percent by weight or less of water.
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Anderson Lawrence G.
Hockswender Thomas R.
Singer Debra L.
Altman Deborah M.
Diaz Robert A.
Hays Steven W.
Metzmaier Daniel S
PPG Industries Ohio Inc.
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