US PATENT SUBCLASS 588 / 257
.~.~.~ And confined in a cement type material (e.g., concrete)

Current as of: June, 1999
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588 /   HD   HAZARDOUS OR TOXIC WASTE DESTRUCTION OR CONTAINMENT

249  DF  CONTAINMENT {6}
252  DF  .~ Solidification, vitrification, or cementation {4}
256  DF  .~.~ Waste contains heavy metal (e.g., fly, ash, flue dust, and incinerator ash) {1}
257.~.~.~ And confined in a cement type material (e.g., concrete)

DEFINITION

Classification: 588/257

And confined in a cement type material (e.g., concrete):

(under subclass 256) Processes wherein waste is used in the production or formulation of a cement type product.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

600+, for alkali metal silicate containing subclasses 638+ for inorganic settable ingredient containing, and subclasses 286.1+ for compositions, coating or plastic which contain only inorganic materials with at least one metal atom. Class 588 contains any formulation of the above materials with hazardous or toxic waste.

405, Hydraulic and Earth Engineering,

266+, for cementitious grouting.