US PATENT SUBCLASS 422 / 60
.~.~.~.~ Having plural-layered material

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

50  DF  ANALYZER, STRUCTURED INDICATOR, OR MANIPULATIVE LABORATORY DEVICE {11}
55  DF  .~ Structured visual or optical indicator, per se {3}
58  DF  .~.~ In holder or container having special form {1}
59  DF  .~.~.~ Column {1}
60.~.~.~.~ Having plural-layered material

DEFINITION

Classification: 422/60

Having plural-layered material:

(under subclass 59) Apparatus having material consisting of multiple distinct layers.