US PATENT SUBCLASS 122 / 7 A
.~.~ Steel converter


Current as of: June, 1999
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122 /   HD   LIQUID HEATERS AND VAPORIZERS

6 R  DF  INDUSTRIAL {7}
7 R  DF  .~ Waste heat {4}
7 A.~.~ Steel converter

Unofficial Alpha Subclasses: R A B C D

DEFINITION

Classification: 122/7

(under subclass 6) Devices comprising combinations of a conventional type of industrial furnace and a boiler located so as to be heated by the waste heat of the furnace.

SEE OR SEARCH THIS CLASS, SUBCLASS:

20, 421 and 470, for analogous devices.

SEE OR SEARCH CLASS

432, Heating,

90+, for (1) a structure in which the waste heat of a nominal boiler heats a material heating chamber of the Class 432 type (2) a structure in which the waste heat of a specific furnace heats a closed water chamber or conduit or (3) for a residual combination of a liquid heater and a work heater of the Class 432 type in which the heated liquid is utilized in heating the work.