US PATENT SUBCLASS 106 / 812
.~.~.~ With added silica (e.g., sand, etc.)

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}
811  DF  .~.~ Soil, diatomaceous earth, clay, slate or shale containing, or material for treating soil or earth (e.g., soil stabilization, etc.) {1}
812.~.~.~ With added silica (e.g., sand, etc.)

DEFINITION

Classification: 106/812

With added silica (e.g., sand, etc.):

(under subclass 811) Subject matter including silica other than that contained in the clay, soil, diatomaceous earth, slate or shale.