US PATENT SUBCLASS 62 / 51.2
.~.~ Utilizing Joule-Thomson effect

Current as of: June, 1999
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62 /   HD   REFRIGERATION

600  DF  CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE {4}
606  DF  .~ Liquefaction {6}
51.2.~.~ Utilizing Joule-Thomson effect {1}
610  DF  .~.~.~> He3/He4 dilution refrigerator (i.e., superfluid)

DEFINITION

Classification: 62/51.2

Joule-Thompson liquefier:

(under subclass 608) Subject matter wherein the liquefaction of helium is effected bypassage from a high pressure to a low pressure through an adjustable orifice and the exiting liquid precools the incoming gas by indirect heat exchange.