US PATENT SUBCLASS 122 / 374
.~ Grate structure

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

371  DF  WATER GRATE {5}
374.~ Grate structure {1}
375  DF  .~.~> Solid and water bar

DEFINITION

Classification: 122/374

(under subclass 371) Subject matter comprising the structure of water grates themselves except the cage grate type.

SEE OR SEARCH THIS CLASS, SUBCLASS:

321, for water tube boilers having a vertical pipe relatively large in cross section and provided with some form of water tubes and not otherwise provided for.

373, 375, for other water grate structures.