US PATENT SUBCLASS 60 / 671
.~.~ Motive fluid comprises a material other than steam or water

Current as of: June, 1999
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60 /   HD   POWER PLANTS

643  DF  MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
670  DF  .~ Power system involving change of state {6}
671.~.~ Motive fluid comprises a material other than steam or water {3}
672  DF  .~.~.~> Motor exhaust used in combustion zone
673  DF  .~.~.~> One fluid absorbs or reacts with another
674  DF  .~.~.~> Air and steam supplied to motor

DEFINITION

Classification: 60/671

(under subclass 670) Apparatus, in which a claim includes a recitation of (1) the material which comprises the fluid which is energized to motivate the motor means; or (2) a material, other than fuel or substance which is burned to give off heat, which is mixed with a motive fluid for energization thereof to motivate a motor means.

SEE OR SEARCH THIS CLASS, SUBCLASS:

649, for a heat operated power producing procedure that includes mixing or separating materials of different chemical composition in a motive fluid flow path.