US PATENT SUBCLASS 210 / 495
.~.~ Single ring or closed frame type

Current as of: June, 1999
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210 /   HD   LIQUID PURIFICATION OR SEPARATION

348  DF  FILTER {25}
483  DF  .~ Supported, shaped or superimposed formed mediums {11}
495.~.~ Single ring or closed frame type

DEFINITION

Classification: 210/495

(under subclass 483) Apparatus in which the supporting means comprises a ring or noncircular frame.

SEE OR SEARCH THIS CLASS, SUBCLASS:

471, for a filter having a handled ring frame.

485, for a filter enclosed in a cage support.