US PATENT SUBCLASS 138 / 34
.~ Anti-freeze substance

Current as of: June, 1999
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138 /   HD   PIPES AND TUBULAR CONDUITS

32  DF  THAWING AND FREEZE PROTECTION {3}
34.~ Anti-freeze substance

DEFINITION

Classification: 138/34

(under subclass 32) Devices which have means for putting an antifreeze substance into the fluid in the pipe.

SEE OR SEARCH CLASS

48, Gas: Heating and Illuminating,

190, for the addition of combustible, antifreeze solutions to gaseous fuels.

252, Compositions, for antifreeze compounds.