US PATENT SUBCLASS 422 / 947
.~.~ Using capillary action, including fluid transfer through absorbent matrix [B01L 3/00C6C]


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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

939  DD  CONTAINERS FOR THE PURPOSE OF RETAINING A MATERIAL TO BE ANALYZED [B01L 3/00C] {3}
946  DD  .~ With fluid transport, e.g., multi-compartment structure [B01L 3/00C6] {2}
947.~.~ Using capillary action, including fluid transfer through absorbent matrix [B01L 3/00C6C]