US PATENT SUBCLASS 417 / 901
CRYOGENIC PUMPS
Current as of: June, 1999
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DEFINITION
Classification: 417/901
Pumps which are disclosed as pumping gases in the liquified state at very low temperatures, e.g., liquid oxygen. This collection is not intended to include refrigerant compressors in which the refrigerant liquifies at a relatively high temperature when placed under compression.
SEE OR SEARCH CLASS
62, Refrigeration,
45.1+, for stored solidified or liquified gas handling.
