US PATENT SUBCLASS 436 / 170
.~.~ Plural superposed layers


Current as of: June, 1999
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436 /   HD   CHEMISTRY: ANALYTICAL AND IMMUNOLOGICAL TESTING

164  DF  OPTICAL RESULT {6}
169  DF  .~ With reagent in absorbent or bibulous substrate {1}
170.~.~ Plural superposed layers


DEFINITION

Classification: 436/170

Plural superposed layers:

(under subclass 169) Processes wherein the absorbent or bibulous carrier or substrate includes plural superposed layers, and wherein the material to be analyzed flows between at least two layers.

(1) Note. Mere support of an absorbent or bibulous carrier or substrate on a support is not included in this subclass.

SEE OR SEARCH CLASS

422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,

60, for apparatus for carrying out the process of this subclass.