US PATENT SUBCLASS 417 / 53
PROCESSES

Current as of: June, 1999
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417 /   HD   PUMPS

53PROCESSES {1}
54  DF  .~> Of pumping one fluid by contact or entrainment with another {1}

DEFINITION

Classification: 417/53

(under the class definition) Processes of pumping.

SEE OR SEARCH CLASS

166, Wells,

369+, for a process of producing a well including a significant manipulative step in addition to pumping.