US PATENT SUBCLASS 516 / 924
SIGNIFICANT DISPERSIVE OR MANIPULATIVE OPERATION OR STEP IN MAKING OR STABILIZING COLLOID SYSTEM

Current as of: June, 1999
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516 /   HD   COLLOID SYSTEMS AND WETTING AGENTS; SUBCOMBINATIONS THEREOF; PROCESSES OF

924SIGNIFICANT DISPERSIVE OR MANIPULATIVE OPERATION OR STEP IN MAKING OR STABILIZING COLLOID SYSTEM {5}
925  DF  .~> Phase inversion
926  DF  .~> Phase change (e.g., melting)
927  DF  .~> In situ formation ofacolloid system making or stabilizing agent which chemical reaction
928  DF  .~> Mixing combined with non-mixing operation or step, successively or simultaneously (e.g., heating, cooling, pH change, ageing, milling)
929  DF  .~> Specified combination of agitation steps (e.g., mixing to make subcombination composition followed by homogenization) {2}

DEFINITION

Classification: 516/924

SIGNIFICANT DISPERSIVE OR MANIPULATIVE OPERATION OR STEP IN MAKING OR STABILIZING COLLOID SYSTEM:

(under the class definition) A collection of art which discloses a significant dispersive or manipulative operation or step in making or stabilizing a colloid system.

SEE OR SEARCH CLASS

366, Agitating,

69+, for apparatus which may be used for working liquid into a gel, subclasses 101+ for apparatus which includes agitation and injection of gas which may be a foam, subclasses 108+ for apparatus wherein the agitation is effected by vibratory device, subclasses 176.1+ for apparatus for forming suspensions or emulsions by agitation, subclasses 279+ for apparatus with rotatable stirrer which may be used for making lather or foam, and cross-reference art collection 604 for mixing apparatus for making foam or lather, cross-reference art collection 605 for mixing apparatus for stirring of paint.

507, Earth Boring, Well Treating, and Oil Field Chemistry,

90, for compositions for addition to petroleum oils during transportation through conduits to prevent fouling or clogging of the conduits due to components of the petroleum oils precipitating out during the transportation (e.g., suspending agents, antiflocculants), subclasses 100+ for earth boring compositions which may contain colloid systems

(e.g., dispersions, suspensions, emulsions) or wetting agents (especially subclass 102 for compositions which may contain foam), subclasses 200+ for well treating compositions which may contain colloid systems (e.g., dispersions, suspensions, emulsions) or wetting agents (especially subclass 202 for compositions which may contain foam), cross-reference art collection 922+ for fracture fluids which may be gels.