US PATENT SUBCLASS 52 / 131
.~ With fluid guiding port from ambient

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

128  DF  BURIAL VAULT {8}
131.~ With fluid guiding port from ambient {1}
132  DF  .~.~> With internal air director

DEFINITION

Classification: 52/131

(under subclass 128) Structure including an opening, e.g., port, in an outer barrier of the receptacle which communicates the enclosed space with the ambient atmosphere or earth.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129+, for a drain or vent with a corpse product treating feature.

198+, for a similar structure of more general application.