US PATENT SUBCLASS 55 / 512
.~ Discrete fibrous or particulate solids

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

490  DF  WITH MEANS SECURING OR RETAINING SEPARATING MEDIA {7}
512.~ Discrete fibrous or particulate solids {4}
513  DF  .~.~> Resilient securing means
514  DF  .~.~> Fused or bonded to a supporting or backing member
515  DF  .~.~> Foraminous container
516  DF  .~.~> Held between openwork {3}

DEFINITION

Classification: 55/512

(under subclass 490) Apparatus for containing, securing in a flow line, or maintaining as a cohesive mass a filter media comprised of numerous individual entangled or unconnected elements.

(1) Note. For apparatus for positioning a filter unit, the filter media, per se, being comprised of entangled or unconnected elements, in a flow line see subclass 495 and (1) Note thereto.

SEE OR SEARCH THIS CLASS, SUBCLASS:

478, for a filter of discrete particles in a flow line with separate access means to the flow line or with passage means for the filter media off-set to the gas flow path.

SEE OR SEARCH CLASS

95, Gas Separation: Processes,

274+, for processes of gas separation by filtering through a mass of particulate solids.