US PATENT SUBCLASS 55 / 523
.~ Ceramic or sintered

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

522  DF  SPECIFIC MEDIA MATERIAL {4}
523.~ Ceramic or sintered

DEFINITION

Classification: 55/523

(under subclass 522) Apparatus in which the media is a porous body made of a fired earth or by heating a powdered metal to form a coherent mass without thoroughly melting.