US PATENT SUBCLASS 588 / 252
.~ Solidification, vitrification, or cementation

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

249  DF  CONTAINMENT {6}
252.~ Solidification, vitrification, or cementation {4}
253  DF  .~.~> In situ vitrification
254  DF  .~.~> Contains asbestos
255  DF  .~.~> Polymer or resin containing (e.g., foam, etc.)
256  DF  .~.~> Waste contains heavy metal (e.g., fly, ash, flue dust, and incinerator ash) {1}

DEFINITION

Classification: 588/252

Solidification, vitrification, or cementation:

(under subclass 249) Processes wherein containment is accomplished by the use of solidification, vitrification, or cementation as a means of immobilizing hazardous or toxic waste.

(1) Note. Solidification included herein is any process that will produce a solid phase nonleachable product.

(2) Note. Vitrification included herein is any process that will produce a solid phase nonleachable glass like noncrystalline product.

(3) Note. Cementation included herein is any process that will produce a solid phase nonleachable hydraulic setting product.

SEE OR SEARCH CLASS

65, Glass Manufacturing, appropriate subclasses for the methods of producing glass.

106, Compositions: Coating or Plastic,

600+, for alkali metal silicate containing compositions and subclasses 638+ for inorganic settable ingredient containing compositions. 210, Liquid Purification or Separation,

749+, for a chemical treatment process.

501, Compositions: Ceramic,

2+, for devitrified glass - ceramics, subclasses 11+ for glass compositions, and subclass 124 for refractory hydraulic cement containing compositions.