US PATENT SUBCLASS 432 / 4
.~ Including apparatus heat-up, cool-down or protection


Current as of: June, 1999
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432 /   HD   HEATING

1  DF  PROCESSES OF HEATING OR HEATER OPERATION {14}
4.~ Including apparatus heat-up, cool-down or protection


DEFINITION

Classification: 432/4

(under subclass 1) Process including (1) a step or procedure for preventing damage to a heating device or (2) a procedure effective to bring a heating device up to or to lower its temperature from operating temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

35, for a heating apparatus having a frangible or fusible safety relief or shutdown means.

38, for a condition responsive control of apparatus protecting fluid or means:

116, for a rotary drum furnace having protective cooling means.

233+, for a heating apparatus element having protective cooling structure.

248, for a melt holding section of a furnace having a protected section. 251, for furnace structure having expansion, absorbing or relieving means.

SEE OR SEARCH CLASS

164, Metal Founding,

121, for a process in which founding apparatus is readied for casting.