US PATENT SUBCLASS 62 / 631
.~.~.~.~.~ Recycle

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


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}
620  DF  .~.~.~ Distillation {9}
630  DF  .~.~.~.~ Plural columns {1}
631.~.~.~.~.~ Recycle

DEFINITION

Classification: 62/631

Recycle:

(under subclass 630) Subject matter wherein a product of separation from one of the columns is returned to the other column.