US PATENT SUBCLASS 501 / 141
.~ Clay containing (e.g., porcelain, earthenware, etc.)

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

1  DF  CERAMIC COMPOSITIONS {15}
141.~ Clay containing (e.g., porcelain, earthenware, etc.) {3}
142  DF  .~.~> And phosphorus (e.g., bone china, etc.)
143  DF  .~.~> And flint or feldspar {1}
145  DF  .~.~> Clay pretreatment {3}

DEFINITION

Classification: 501/141

Clay containing (e.g., porcelain, earthenware, etc.):

(under subclass 1) Compositions or methods for their preparation which include a clay ingredient.

(1) Note. Many of the compositions classified herein are described as constituting porcelain or earthenware.

SEE OR SEARCH THIS CLASS, SUBCLASS:

127+, for refractory compositions including clay.

SEE OR SEARCH CLASS

106, Compositions: Coating or Plastic,

468, and 486+ for fillers, pigments, and aggregates comprising clay.