US PATENT SUBCLASS 435 / 287.8
.~.~.~ Including multiple, stacked layers

Current as of: June, 1999
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435 /   HD   CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY

283.1  DF  APPARATUS {9}
287.1  DF  .~ Including measuring or testing {11}
287.7  DF  .~.~ Including bibulous or absorbent layer {1}
287.8.~.~.~ Including multiple, stacked layers

DEFINITION

Classification: 435/287.8

Including multiple, stacked layers:

(under subclass 287.7) Apparatus wherein a reagent or sample is contained or placed in or on an element containing multiple stacked layers of an absorbent or bibulous carrier or substrate.