US PATENT SUBCLASS 62 / 603
.~.~.~ Snow

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  DF  .~.~ Carbon dioxide {1}
603.~.~.~ Snow {2}
604  DF  .~.~.~.~> Pressed block
605  DF  .~.~.~.~> Extruded pellets

DEFINITION

Classification: 62/603

Snow:

(under subclass 602) Subject matter wherein the carbon dioxide is formed into crystalline flakes.