US PATENT SUBCLASS 210 / 509
.~.~.~.~ Inorganic

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

348  DF  FILTER {25}
500.1  DF  .~ Material {6}
506  DF  .~.~ Coated or impregnated, e.g., adhesively bound {2}
508  DF  .~.~.~ Fibrous {1}
509.~.~.~.~ Inorganic

DEFINITION

Classification: 210/509

(under subclass 508) Compositions in which the fibers are inorganic, e.g., asbestos or glass wool.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

210, 317.9, 325, 426+, and 443+ for a stock material form of a single or plural layer web or sheet which may include glass or asbestos fibers or filaments.

442, Fabric (Woven, Knitted, or Nonwoven Textile or Cloth, etc.),

20+, 54+, 172+, 266, 331, 348, and 367 for a fabric which may include glass or inorganic fibers or filaments.