US PATENT SUBCLASS 508 / 136
.~ Silicon dioxide, silicic acid, orthosilicate, or metasilicate, including surface-treated (e.g., clays, onium clays, estersils, etc.)

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
136.~ Silicon dioxide, silicic acid, orthosilicate, or metasilicate, including surface-treated (e.g., clays, onium clays, estersils, etc.) {12}
137  DF  .~.~> With non-siliceous boron compound as additional component or surface- treating agent
138  DF  .~.~> With non-siliceous fluorine-containing polymer as additional component or surface-treating agent (e.g., polytetrafluoroethylene, etc.)
139  DF  .~.~> With elemental sulfur, elemental metal, or alloy as additional component or surface-treating agent
140  DF  .~.~> Asbestos
141  DF  .~.~> With non-siliceous inorganic heavy metal or aluminum compound as additional component or surface-treating agent (e.g., molybdenum disulfide, alumina, etc.)
142  DF  .~.~> With carbohydrate or fibrous plant matter as additional component or surface-treating agent (e.g., starch, elm bark, cellulose compounds, etc.)
143  DF  .~.~> With added water
144  DF  .~.~> With carboxylic acid, salt thereof, sulfonic acid, or salt thereof as additional component or surface-treating agent
145  DF  .~.~> With triazine or triazole hetero ring compound as additional component or surface-treating agent
146  DF  .~.~> With heterocyclic ring compound that has ring sulfur or has chalcogen double bonded to heterocyclic ring carbon as additional component or surface-treating agent; a heterocyclic ring is one having as ring members only carbon and at least one hetero atom selected from chalcogen (i.e., oxygen, sulfur, selenium, or tellurium) and nitrogen (e.g., thiadiazoles, cyclic carbonates, etc.)
147  DF  .~.~> With azo compound, inorganic phophorus salt, or oxidate of undetermined composition as additional component or surface-treating agent
148  DF  .~.~> Talc, mica, or ultramarine blue

DEFINITION

Classification: 508/136

Silicon dioxide, silicic acid, orthosilicate, or metasilicate, including surface-treated (e.g., clays, onium clays, estersils, etc.):

(under subclass 110) Compositions which contain silicon dioxide, silicic acid, orthosilicate, or metasilicate; these materials may be present either per se or in a surface-treated state.

(1) Note. Surface-treated encompasses both physical and chemical surface treatment. Silicon dioxide, e.g., may be simply coated, or its outer layer may be made to chemically react with a surface treating agent.

(2) Note. Silicon dioxide is also known as silica, SiO2.

(3) Note. Silicic acids encompass inorganic compounds wherein silicon is bonded directly to a hydroxyl group.

(4) Note. An inorganic compound is any compound not specified to be organic in (3) Note of the class definition.

(5) Note. Orthosilicates (M4SiO4) and metasilicates (M2SiO3) may combine to form polysilicates, M being metal or in some cases ammonium. They are salts derived from silica or the silicic acids. All the common clays are included under this umbrella.

SEE OR SEARCH CLASS

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting, 31+, for colloid systems of colloid-sized solid or semisolid phase dispersed in primarily organic continuous liquid phase, subclasses 38+ for colloid systems of colloid-sized bituminous, coal, or Carbon phase dispersed in aqueous continuous liquid phase, subclasses 77+ for colloid systems of colloid-sized solid phase dispersed in aqueous continuous liquid phase; subclasses 98+ for colloid systems of continuous or semicontinuous solid phase with discontinuous liquid phase (gels, pastes, flocs, coagulates); or agents for

such systems or making or stabilizing such systems or agents; in each instance, when generically claimed or when there is no hierarchically superior provision in the USPC for the specifically claimed art.