US PATENT SUBCLASS 106 / 820
.~.~ Expanding, foaming or porosity producing additive

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

*  DD  MATERIALS OR INGREDIENTS {7}
819  DF  .~ Additive materials for inorganic cements which contain a hydraulic settable material {4}
820.~.~ Expanding, foaming or porosity producing additive

DEFINITION

Classification: 106/820

Expanding, foaming or porosity producing additive:

(under subclass 819) Subject matter wherein the additive material serves for producing porosity in, foaming or expanding inorganic cements.