US PATENT SUBCLASS 106 / 668
.~.~ Bituminous material or tarry residue, pitch, or coal containing

Current as of: June, 1999
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106 /   HD   COMPOSITIONS: COATING OR PLASTIC

*  DD  COATING OR PLASTIC COMPOSITIONS {40}
638  DF  .~ Inorganic settable ingredient containing {30}
668.~.~ Bituminous material or tarry residue, pitch, or coal containing {3}
669  DF  .~.~.~> Soil, diatomaceous earth, or clay, containing, or material for treating soil or earth (e.g., soil stabilization, etc.)
670  DF  .~.~.~> Calcium sulfate containing
671  DF  .~.~.~> With other organic material

DEFINITION

Classification: 106/668

Bituminous material or tarry residue, pitch, or coal containing:

(under subclass 638) Subject matter involving bituminous material or tarry residue, pitch or coal, e.g., asphalt, etc.