US PATENT SUBCLASS 417 / 55
.~.~ Specific motive fluid

Current as of: June, 1999
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417 /   HD   PUMPS

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

DEFINITION

Classification: 417/55

(under subclass 54) Processes in which the composition of the motive fluid is specified in a claim.

(1) Note. The following are excluded under this definition as specific motive fluid: water, air, steam, mercury. Oil is also excluded under this definition unless the composition is more specifically recited than mere "oil".