US PATENT SUBCLASS 442 / 390
.~.~.~ At least one layer of inorganic strand or fiber material and at least one layer of synthetic polymeric strand or fiber material

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

327  DF  NONWOVEN FABRIC (I.E., NONWOVEN STRAND OR FIBER MATERIAL) {20}
381  DF  .~ Including an additional nonwoven fabric {8}
389  DF  .~.~ Separate nonwoven fabric layers comprise chemically different strand or fiber material {1}
390.~.~.~ At least one layer of inorganic strand or fiber material and at least one layer of synthetic polymeric strand or fiber material

DEFINITION

Classification: 442/390

At least one layer of inorganic strand or fiber material and at least one layer of synthetic polymeric strand or fiber material:

(under subclass 389) Subject matter wherein the nonwoven layer comprises inorganic strands or fiber materials and the additional nonwoven layer comprises synthetic polymeric strand or fiber material.