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Class Information
Number: 210/478
Name: Liquid purification or separation > Filter > Resting on supporting receiver, e.g., portable > Resting on internal stop or surface > Unitary filter medium and radially expandable retainer
Description: Apparatus in which a radially expansible retainer, such as a resilient ring or downwardly projecting spring arms, and the filter form an integral unit.

Patents under this class:

Patent Number Title Of Patent Date Issued
7201843 Framed storm drain insert sediment filter Apr. 10, 2007
6886698 Apparatus for removing pyrophoric catalyst May. 3, 2005
6770203 Filtering unit having separately attachable filter cassette, filter cassette, and method of filtering Aug. 3, 2004
6458278 Filtering unit having separately attachable filter cassette, filter cassette, and method of filtering Oct. 1, 2002
5902481 Strainer for draining liquid-packed canned goods May. 11, 1999
5888392 Filter position retention ring Mar. 30, 1999
5772713 Adjustable filter assembly Jun. 30, 1998
5709794 Low-cost portable water filter Jan. 20, 1998
5292437 Multilayer frustoconical filter structure Mar. 8, 1994
5252211 Coffee filter support assembly Oct. 12, 1993
5076924 Filter plate Dec. 31, 1991
4981588 Filter for making coffee drinks that includes supporting members Jan. 1, 1991
4859337 Filter for making portions of coffee or tea Aug. 22, 1989
4623457 Water purifier Nov. 18, 1986
4519911 Paper extractor May. 28, 1985
4358377 Shear-vectoring design for composite casing end and removable, pressure-locking closure therefor Nov. 9, 1982
4253959 Liquid filter vessel Mar. 3, 1981

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