US PATENT SUBCLASS 442 / 320
FELT FABRIC

Current as of: June, 1999
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442 /   HD   FABRIC (WOVEN, KNITTED, OR NONWOVEN TEXTILE OR CLOTH, ETC.)

320FELT FABRIC {4}
321  DF  .~> From natural organic fiber (e.g., wool, etc.) {2}
324  DF  .~> From synthetic organic fiber
325  DF  .~> Including particulate material other than fiber
326  DF  .~> At least three layers

DEFINITION

Classification: 442/320

FELT FABRIC:

(under the class definition) Subject matter wherein the fabric comprises fibers having barbs or some other laterally extending fiber portion, the fibers being worked together by pressure, heat, or some other means without weaving or knitting to form a sheet having structural integrity due to the interlocking of the barb-like extensions on the fibers.

SEE OR SEARCH CLASS

428, Stock Material or Miscellaneous Articles,

141+, for a textured surface, such as roofing elements, comprising asphalt impregnated felt fabric substrates with particulate matter thereon.