US PATENT SUBCLASS 442 / 255
.~.~ Three or more distinct layers


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

181  DF  WOVEN FABRIC (I.E., WOVEN STRAND OR STRIP MATERIAL) {13}
239  DF  .~ Woven fabric including an additional woven fabric layer {4}
255.~.~ Three or more distinct layers {9}
256  DF  .~.~.~> At least one layer is derived from water-settable material (e.g., cement, gypsum, etc.)
257  DF  .~.~.~> At least one layer contains wood or cork
258  DF  .~.~.~> At least one layer contains bituminous material (e.g., tar, pitch, asphalt, etc.)
259  DF  .~.~.~> At least one layer comprises paper
260  DF  .~.~.~> At least one layer contains natural or synthetic rubber
261  DF  .~.~.~> At least one layer is a preformed synthetic polymeric film or sheet
262  DF  .~.~.~> At least one layer comprises ceramic or glass material in other than particulate form
263  DF  .~.~.~> Composite consisting of at least two woven fabrics bonded by an interposed adhesive layer (but not two woven fabrics bonded together by an impregnation which penetrates through the thickness of at least one of the woven fabric layers) {3}
267  DF  .~.~.~> Including particulate material other than fiber


DEFINITION

Classification: 442/255

Three or more distinct layers:

(under subclass 239) Subject matter wherein the woven fabric is combined with two or more additional distinct layers.