US PATENT SUBCLASS 516 / 111-- .~ The solid phase contains silica (e.g., hydrated silicagel)

US PATENT SUBCLASS 516 / 111
.~ The solid phase contains silica (e.g., hydrated silicagel)

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

98	DF	CONTINUOUS OR SEMICONTINUOUS SOLID PHASE (I.E., SYSTEMS WHICH EXHIBIT PLASTICITY, ELASTICITY, OR RIGIDITY): COLLOID SYSTEMS; COMPOSITIONS CONTAINING AN AGENT FOR MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF MAKING OR STABILIZING COLLOID SYSTEMS; PROCESSES OF PREPARING THE COMPOSITIONS (E.G., GEL, PASTE, GELLED EMULSION, FLOC) {4}
111		.~ The solid phase contains silica (e.g., hydrated silicagel)

DEFINITION

Classification: 516/111

The solid phase contains silica (e.g., hydrated silicagel):

(under subclass 98) Subject matter in which the solid phase

contains silica, such as, hydrated silicagel.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99+, for colloid systems in which the solid phase contains organic* material*, alone or in combination with silica.

SEE OR SEARCH CLASS

65, Glass Manufacturing,

17.2, for processes of working or treating glass which includes a sol-gel route or liquid phase route procedure during any stage of working or treating glass.

501, Compositions: Ceramic, 12, for glass or glass forming compositions which are made by a gel route.

502, Catalyst, Solid Sorbent, or Support Therefor: Product or Process of Making,

233+, for forming a catalyst or precursor comprising forming silica gel (i.e., an amorphous form of hydrate silica, generally produced by precipitation or coagulation of a silica sol or decomposition of a silicate), subclass 405 for solid sorbent comprising inorganic gel composition, in which there is usually a metal or silicon oxide in relatively minor amount is distributed in suspension in water, appearing to be solid while the water constitutes as much as 95 to 99% of the mixture.

508, Solid Antifriction Devices, Material Therefor, Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions, appropriate subclasses for claimed or solely disclosed lubricants composed of suspension which may be colloid systems, see

136+, for compositions which are miscellaneous mineral oil compositions, or are lubricants or separants for moving solid surfaces, which contain silicon dioxide, silicic acid, orthosilicate, or metasilicate (e.g., clays, onium clays, estersils, etc.) which may be surface-treated. This class is organized based upon the chemical constituents or chemical reactants of the composition or device; no subclass specifically provides for colloid systems or wetting agents, therefore such subject matter would be placed based upon its constituents as though it were a solution or mixture having no colloid system characteristic.