US PATENT SUBCLASS 159 / 17.1
MULTIPLE EFFECTS

Current as of: June, 1999
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159 /   HD   CONCENTRATING EVAPORATORS

17.1MULTIPLE EFFECTS {6}
17.2  DF  .~> Parallel fluid flow
17.3  DF  .~> Variant multistaging
17.4  DF  .~> Contiguous evaporators
18  DF  .~> Superimposed
19  DF  .~> Combined closed and open
20.1  DF  .~> Variable or counterflow {1}

DEFINITION

Classification: 159/17.1

MULTIPLE EFFECTS:

(under the class definition) Apparatus relating to a series of two or more vessels in communication, adapted to cause evaporation of their liquid content at unequal pressures. The communication may be either for the purpose of transmitting the vapors evolved in one vessel to the heating element of another operating at a different pressure, or for transmitting liquid material from one vessel to another operating at a different pressure for evaporation.