US PATENT SUBCLASS 264 / 679
.~ Of clay containing material

Current as of: June, 1999
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264 /   HD   PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES

603  DF  OUTSIDE OF MOLD SINTERING OR VITRIFYING OF SHAPED INORGANIC ARTICLE OR PREFORM {30}
679.~ Of clay containing material {1}
680  DF  .~.~> Clay containing block, tile, or brick

DEFINITION

Classification: 264/679

Of clay containing material:

(under subclass 603) Process wherein an article or preform undergoing shaping or treatment is a material containing clay (i.e., an earthy material that is composed of hydrous aluminum silicates and other materials that are plastic when moist and hard when fired).