US PATENT SUBCLASS 62 / 635
.~.~.~.~ Plural contact columns

Current as of: June, 1999
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62 /   HD   REFRIGERATION

600  DF  CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE {4}
617  DF  .~ Separation of gas mixture {3}
618  DF  .~.~ Natural gas {5}
632  DF  .~.~.~ Liquid contact {3}
635.~.~.~.~ Plural contact columns

DEFINITION

Classification: 62/635

Plural contact columns:

(under subclass 632) Subject matter wherein the products of separation from the liquid contact step undergo another separation with an additional liquid contacting the gas or gas mixture.