US PATENT SUBCLASS 508 / 148
.~.~ Talc, mica, or ultramarine blue

Current as of: June, 1999
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508 /   HD   SOLID ANTI-FRICTION DEVICES, MATERIALS THEREFOR, LUBRICANT OR SEPARATE COMPOSITIONS FOR MOVING SOLID SURFACES, AND MISCELLANEOUS MINERAL OIL COMPOSITIONS

110  DF  LUBRICANTS OR SEPARANTS FOR MOVING SOLID SURFACES AND MISCELLANEOUS MINERAL OIL COMPOSITIONS (E.G., WATER CONTAINING, ETC.) {53}
136  DF  .~ Silicon dioxide, silicic acid, orthosilicate, or metasilicate, including surface-treated (e.g., clays, onium clays, estersils, etc.) {12}
148.~.~ Talc, mica, or ultramarine blue

DEFINITION

Classification: 508/148

Talc, mica, or ultramarine blue:

(under subclass 136) Compositions which contain talc, mica, or ultramarine blue, any of which may or may not be surface-treated.

(1) Note. Talc is 3MgO-4SiO2-H2O. It is also called soapstone, French chalk, steatite, etc.

(2) Note. Ultramarine blue is of the approximate formula

Na3Al3[end subscrpt]Si3-4S2[end subscrpt]O13