US PATENT SUBCLASS 502 / 180
.~.~ Elemental carbon

Current as of: June, 1999
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502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

100  DF  CATALYST OR PRECURSOR THEREFOR {12}
174  DF  .~ Inorganic carbon containing {4}
180.~.~ Elemental carbon {2}
181  DF  .~.~.~> And halogen containing
182  DF  .~.~.~> And metal, metal oxide, or metal hydroxide {3}

DEFINITION

Classification: 502/180

Elemental carbon:

(under subclass 174) Composition in which the carbon is in the free state.

(1) Note. Bone black, generally considered to be a form of carbon, includes approximately 80% calcium phosphate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

416+, for a free carbon containing sorbent composition.

SEE OR SEARCH CLASS

201, Distillation: Processes, Thermolytic, for a process of producing carbon by destructive distillation.

423, Chemistry of Inorganic Compounds,

445, for elemental carbon, per se, and processes of producing carbon.