US PATENT SUBCLASS 220 / 62.15
.~ Including a layer which comprises an inorganic, nonmetallic material (e.g., porcelain, glass, brick, concrete, earthenware)

Current as of: June, 1999
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220 /   HD   RECEPTACLES

62.11  DF  RECEPTACLE SIDE WALL MADE OF TWO OR MORE LAYERS OF MATERIAL PERMANENTLY ATTACHED TOGETHER {10}
62.15.~ Including a layer which comprises an inorganic, nonmetallic material (e.g., porcelain, glass, brick, concrete, earthenware)

DEFINITION

Classification: 220/62.15

Including a layer which comprises an inorganic, nonmetallic material (e.g., porcelain, glass, brick, concrete, earthenware):

(under subclass 62.11) Subject matter wherein the receptacle has a layer which includes a material other than a carbon compound or a metal.