US PATENT SUBCLASS 442 / 256
.~.~.~ At least one layer is derived from water-settable material (e.g., cement, gypsum, etc.)

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  DF  .~.~ Three or more distinct layers {9}
256.~.~.~ At least one layer is derived from water-settable material (e.g., cement, gypsum, etc.)

DEFINITION

Classification: 442/256

At least one layer is derived from water-settable material (e.g., cement, gypsum, etc.):

(under subclass 255) Subject matter wherein at least one layer contains a water-settable material (e.g., cement, gypsum, etc.) which forms a distinct layer.