.~ 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.
