US PATENT SUBCLASS 516 / 32
.~.~.~ The material primarily contains elemental carbon (e.g., graphite, diamond)

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

9  DF  CONTINUOUS LIQUID OR SUPERCRITICAL PHASE: 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., THICKENING AGENT; PROTECTIVE COLLOID AGENT; COMPOSITION CONTAINING AN EMULSIFYING AGENT WITH NO DISPERSANT* DISCLOSED; ORGANIC LIQUID EMULSIFIED IN ANHYDROUS HF) {5}
20  DF  .~ Primarily organic continuous liquid phase (e.g., organic liquid emulsified in an organic liquid) {2}
31  DF  .~.~ Discontinuous phase material primarily solid or semisolid (e.g., colloid- sized dispersion of gel particles, or paraffin wax, or polytetrafluoroethylene) {2}
32.~.~.~ The material primarily contains elemental carbon (e.g., graphite, diamond)

DEFINITION

Classification: 516/32

The material primarily contains elemental carbon (e.g., graphite, diamond):

(under subclass 31) Subject matter in which the discontinuous phase material* is primarily elemental carbon, such as graphite or diamond.

(1) Note. "Primarily contains elemental carbon" means that 50% or more of the material* is elemental carbon, by weight, volume, molecule, or atom.

SEE OR SEARCH THIS CLASS, SUBCLASS:

38+, for colloid systems (e.g., emulsions, suspensions, or dispersions) in which the continuous liquid phase is aqueous and the discontinuous phase is primarily bituminous, coal, or carbon.

901, for a collection of art related to colloid systems of substantially pure carbon, such as graphite, diamond, carbon black, lamp black, fullerenes.

SEE OR SEARCH CLASS

44, Fuel and Related Compositions, for compositions to be used either as a fuel or as a carbonaceous reductant,

280+, for solid carbonaceous fuel dispersed in a liquid medium. 241, Solid Material Comminution or Disintegration,

15+, (particularly subclass 16) for processes for producing non-colloid suspensions of a solid in a liquid by comminuting operations, and subclasses 38+ for apparatus which may produce suspensions of a solid in a liquid by comminuting operations, whether such suspensions be disclosed as colloidal or not.

423, Chemistry of Inorganic Compounds,

445+, for products or processes of making same wherein the product is free carbon in substantially pure form, such as, diamond, fullerenes.

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

416+, for sorbent compositions which are free carbon containing; the term "activated carbon" will be construed as indicating a composition comprising carbon and unidentified components, functioning as a sorbent for this Class.

508, Solid Anti-Friction Device, Materials Therefor,

Lubricant or Separant Compositions for Moving Solid Surfaces, and Miscellaneous Mineral Oil Compositions,

113+, for lubricants containing graphite, coal, or elemental carbon which may be colloid-sized dispersion. 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.