US PATENT SUBCLASS 428 / 210
.~.~ Including ceramic, glass, porcelain or quartz layer

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

98  DF  STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) {20}
195  DF  .~ Discontinuous or differential coating, impregnation or bond (e.g., artwork, printing, retouched photograph, etc.) {9}
210.~.~ Including ceramic, glass, porcelain or quartz layer

DEFINITION

Classification: 428/210

(under subclass 195) Product in which one of the layers contains fused clay* (ceramic*), a fine, white, translucent hard earthenware (porcelain*), or the fused mixture of the silicates of the alkali and alkaline earth or heavy metals (glass*).

(1) Note. Included under this definition of glass is glassy or crystalline silica or quartz*.