US PATENT SUBCLASS 501 / 144
.~.~.~ Kaolin (e.g., ball clay, fire clay, etc.) containing

Current as of: June, 1999
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501 /   HD   COMPOSITIONS: CERAMIC

1  DF  CERAMIC COMPOSITIONS {15}
141  DF  .~ Clay containing (e.g., porcelain, earthenware, etc.) {3}
143  DF  .~.~ And flint or feldspar {1}
144.~.~.~ Kaolin (e.g., ball clay, fire clay, etc.) containing

DEFINITION

Classification: 501/144

Kaolin (e.g., ball clay, fire clay, etc.) containing:

(under subclass 143) Compositions additionally containing kaolin.

(1) Note. The kaolin may be disclosed as ball clay, fire clay, china clay, porcelain clay, bolus alba, terra alba, white bole, or argilla.