US PATENT SUBCLASS 55 / 515
.~.~ Foraminous container

Current as of: June, 1999
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55 /   HD   GAS SEPARATION

490  DF  WITH MEANS SECURING OR RETAINING SEPARATING MEDIA {7}
512  DF  .~ Discrete fibrous or particulate solids {4}
515.~.~ Foraminous container

DEFINITION

Classification: 55/515

(under subclass 512) Apparatus in which the containing, securing or maintaining means comprises a receptacle, all faces or surfaces of which are porous or skeletal.

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516+, for a filter media held between open work.