US PATENT SUBCLASS 62 / 610
.~.~.~ He3/He4 dilution refrigerator (i.e., superfluid)

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  DF  .~.~ Utilizing Joule-Thomson effect {1}
610.~.~.~ He3/He4 dilution refrigerator (i.e., superfluid)

DEFINITION

Classification: 62/610

He3/He4 dilution refrigerator(i.e.superfluid):

(under subclass 608) Subject matter wherein each isotope of helium(i.e., He3 or He4[end subscrpt]) is liquified and is heat exchanged by direct contact with each other resulting in a superfluid condition below the Lambda Point (l) which is 2.17 deg. K.