US PATENT SUBCLASS 62 / 648
.~.~.~.~ Downstream operation

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}
640  DF  .~.~ Air {3}
643  DF  .~.~.~ Distillation {4}
648.~.~.~.~ Downstream operation {2}
649  DF  .~.~.~.~.~> Flowline expansion engine {3}
653  DF  .~.~.~.~.~> Flowline pump {1}

DEFINITION

Classification: 62/648

Downstream operation:

(under subclass 643) Subject matter wherein a separated constituent is acted upon by some process which enhances its characteristics after leaving the distillation column.