US PATENT SUBCLASS 501 / 142
.~.~ And phosphorus (e.g., bone china, etc.)

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}
142.~.~ And phosphorus (e.g., bone china, etc.)

DEFINITION

Classification: 501/142

And phosphorus (e.g., bone china, etc.):

(under subclass 141) Subject matter wherein the composition further includes phosphorus or a compound of phosphorus.

(1) Note. Some of the compositions classified herein are described as constituting bone china.