US PATENT SUBCLASS 62 / 647
.~.~.~.~.~ Spaced initial charging

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}
640  DF  .~.~ Air {3}
643  DF  .~.~.~ Distillation {4}
644  DF  .~.~.~.~ Upstream operation {2}
647.~.~.~.~.~ Spaced initial charging

DEFINITION

Classification: 62/647

Spaced initial charging:

(under subclass 644) Subject matter wherein the feed stream is supplied in a plurality of separate streams and directed to vertically spaced points in the column.