US PATENT SUBCLASS 502 / 416
.~ Free carbon containing

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


502 /   HD   CATALYST, SOLID SORBENT, OR SUPPORT THEREFOR: PRODUCT OR PROCESS OF MAKING

400  DF  SOLID SORBENT {6}
416.~ Free carbon containing {3}
417  DF  .~.~> And specified adde active sorbent material
418  DF  .~.~> Process utilizing solid or liquid source carbonizable material, or product thereof {9}
438  DF  .~.~> Chemically reducing an oxide or product thereof

DEFINITION

Classification: 502/416

Free carbon containing:

(under subclass 400) Composition comprising "activated" carbon or containing the element with atomic number 6 in substantially elemental form.

(1) Note. While relatively pure carbon is provided for in Class 423, subclass 445, the term "activated" will be construed as indicating a composition comprising carbon and unidentified components, functioning as a sorbent for this class.

(2) Note. Charred, coked, pyrolyzed, or incompletely combusted organic material, which may retain some chemically bound carbon will be considered as being in substantially elemental form for this subclass.

SEE OR SEARCH CLASS

516, Colloid Systems and Wetting Agents; Subcombinations Thereof; Processes of Making, Stabilizing, Breaking, or Inhibiting,

32, for colloid systems of colloid-sized carbon (e.g., diamond, graphite) 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, cross-reference 901 for colloid systems of substantially pure elemental carbon (graphite, lamp black, carbon black, fullerenes); 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.