US PATENT SUBCLASS 422 / 181
.~.~.~ Fixed annularly shaped bed of contact material and means directing gas therethrough substantially perpendicular to longitudinal axis of bed

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

129  DF  CHEMICAL REACTOR {28}
168  DF  .~ Waste gas purifier {5}
177  DF  .~.~ Including solid, extended surface, fluid contact reaction means; e.g., inert Raschig rings, particulate absorbent, particulate or monolithic catalyst, etc. {4}
181.~.~.~ Fixed annularly shaped bed of contact material and means directing gas therethrough substantially perpendicular to longitudinal axis of bed

DEFINITION

Classification: 422/181

Fixed annularly shaped bed of contact material and means directing gas therethrough substantially perpendicular to longitudinal axis of bed:

(under subclass 177) Apparatus wherein the extended surface contact means is in the form of a relatively fixed, annularly shaped bed of contact material and including means for directing the flow of waste gas through the contact bed in a direction substantially perpendicular to the longitudinal axis of the contact bed.