US PATENT SUBCLASS 62 / 622
.~.~.~.~.~ Downstream of column


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}
621  DF  .~.~.~.~ Flowline expansion engine {1}
622.~.~.~.~.~ Downstream of column


DEFINITION

Classification: 62/622

Downstream of column:

(under subclass 621) Subject matter wherein the expansion operation occurs downstream of the column.