US PATENT SUBCLASS 442 / 129
.~.~ Acid or alkali resistant


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

59  DF  COATED OR IMPREGNATED WOVEN, KNIT, OR NONWOVEN FABRIC WHICH IS NOT (A) ASSOCIATED WITH ANOTHER PREFORMED LAYER OR FIBER LAYER OR, (B) WITH RESPECT TO WOVEN AND KNIT, CHARACTERIZED, RESPECTIVELY, BY A PARTICULAR OR DIFFERENTIAL WEAVE OR KNIT, WHEREIN THE COATING OR IMPREGNATION IS NEITHER A FOAMED MATERIAL NOR A FREE METAL OR ALLOY LAYER {36}
126  DF  .~ Coating or impregnation is chemically inert or of stated nonreactance {3}
129.~.~ Acid or alkali resistant


DEFINITION

Classification: 442/129

Acid or alkali resistant:

(under subclass 126) Subject matter wherein the coating or impregnation is specifically stated to be resistant to acid or alkali.