US PATENT SUBCLASS 137 / 575
.~.~ Plural top-to-bottom connected tanks

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

561 R  DF  SYSTEMS {32}
571  DF  .~ Plural tanks or compartments connected for serial flow {5}
575.~.~ Plural top-to-bottom connected tanks

DEFINITION

Classification: 137/575

(under subclass 571) Systems in which a flow passage leads from the top of one tank to the bottom of the next tank in the series.