US PATENT SUBCLASS 62 / 602
.~.~ Carbon dioxide

Current as of: June, 1999
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62 /   HD   REFRIGERATION

600  DF  CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE {4}
601  DF  .~ Solidification {1}
602.~.~ Carbon dioxide {1}
603  DF  .~.~.~> Snow {2}

DEFINITION

Classification: 62/602

Carbon dioxide:

(under subclass 601) Subject matter wherein the gas being solidified is carbon dioxide(i.e. CO2.[end subscrpt])<