US PATENT SUBCLASS 501 / 32
.~.~ Glass and material other than glass (e.g., crystal glass, opal glass, etc.)

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

1  DF  CERAMIC COMPOSITIONS {15}
11  DF  .~ Glass compositions, compositions containing glass other than those wherein glass is a bonding agent, or glass batch forming compositions {11}
32.~.~ Glass and material other than glass (e.g., crystal glass, opal glass, etc.)

DEFINITION

Classification: 501/32

Glass and material other than glass (e.g., crystal glass, opal glass, etc.):

(under subclass 11) Compositions which contain a glass and at least one ingredient which is not a glass, wherein the nonglass ingredient is not dissolved in the glass.

(1) Note. This subclass includes such materials as, e.g., two phase glasses, opal glass, crystal glass, etc.

(2) Note. Documents classified as originals in this subclass are cross-referenced on the basis of the chemical nature of the glass composition disclosed into subclasses 40, 41+, and/or 53+ as appropriate.

(3) Note. Documents classified as originals in this subclass which disclose optical glass compositions are cross-referenced in subclasses 900+.