US PATENT SUBCLASS 165 / 72
COVERED ACCESS OPENING

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

72COVERED ACCESS OPENING {2}
73  DF  .~> Cover is, or carries, heat exchanging means {1}
75  DF  .~> Heating or cooling means within the covered chamber

DEFINITION

Classification: 165/72

(under the class definition) Apparatus having an exterior opening closed by a releasably mounted covering section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

71, for a removable purge or drainage plug.

SEE OR SEARCH CLASS

49, Movable or Removable Closures, appropriate subclasses for a closure of the type provided for and see Lines With Other Classes and Within This Class, for the loci of closures specific to the furnace and heating classes.