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Class Information
Number: 210/338
Name: Liquid purification or separation > Plural distinct separators > Filters > In series for prefilt flow > Nested units > Concentric filter elements
Description: Apparatus in which the nested units are concentric filter elements.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8652327 Filter with main and supplemental filter elements and optional bubble breaker Feb. 18, 2014
8641892 Barrel-type fish/particle screen with adjustable flow distribution and debris removal Feb. 4, 2014
8622221 Device for filtering polymer melts Jan. 7, 2014
8590712 Modular filter elements for use in a filter-in-filter cartridge Nov. 26, 2013
8551335 Dual stage filtration with barrier for fuel water separation Oct. 8, 2013
8524090 Blood processing filter Sep. 3, 2013
8517185 Two stage fuel water separator and particulate filter utilizing pleated nanofiber filter material Aug. 27, 2013
8470175 Space reducing filter with supplemental fluid processing element Jun. 25, 2013
8440083 Replaceable filter elements including plural filter media and related filtration systems, techniques and methods May. 14, 2013
8414766 Serviceable oil filter device Apr. 9, 2013
8414767 Module for purifying a fluid, in particular water Apr. 9, 2013
8388843 Integrity testable multilayered filter device Mar. 5, 2013
8333890 Filter cartridge having a filter within a filter, and an endplate sealing structure on an outer filter element Dec. 18, 2012
8329034 Functionalized nonwoven article Dec. 11, 2012
8282825 Cylindrical inline fluids filter Oct. 9, 2012
8221632 Surface water filtration device Jul. 17, 2012
8216470 Multi-stage filter cartridge with polyurethane endcaps Jul. 10, 2012
8206585 Automatic oil-water separation and recovery system used on ships Jun. 26, 2012
8192624 Filtering apparatus Jun. 5, 2012
8146662 Well screen assembly with multi-gage wire wrapped layer Apr. 3, 2012
8147693 Multi-layer filter including retainers Apr. 3, 2012
8128829 Cross flow filter device Mar. 6, 2012
8123942 Liquid filter assembly Feb. 28, 2012
8114291 Pleated single phase filter coalescer element and method Feb. 14, 2012
8083941 Construction of the wedge filtration media laminated by wedge filter plate Dec. 27, 2011
8043504 Filter cartridge Oct. 25, 2011
8034240 Coalescing element Oct. 11, 2011
8017011 Pleated single phase filter coalescer element and method Sep. 13, 2011
7998349 Integrity testable multilayered filter device Aug. 16, 2011
7992723 Filter cartridge with inlet flow diffuser Aug. 9, 2011
7981300 Treating runoff Jul. 19, 2011
7935255 Filter cartridge May. 3, 2011
7922006 Circumferentially pleated filter assembly and method of forming the same Apr. 12, 2011
7887704 Replaceable filter elements including plural filter media and related filtration systems, techniques and methods Feb. 15, 2011
7857974 Filter cartridge with snap fit connection Dec. 28, 2010
7850756 Anti-movement lock with break-away housing mount Dec. 14, 2010
7833307 Air dryer with pre-filter Nov. 16, 2010
7749383 Filter cartridge with crush ribs Jul. 6, 2010
7704396 Coaxial full-flow and bypass oil filter with spring/gasket arrangement Apr. 27, 2010
7704464 Hydrocarbon processing devices and systems for engines and combustion equipment Apr. 27, 2010
7704397 Coaxial full-flow and bypass oil filter having cap with blades Apr. 27, 2010
7658857 Treating runoff Feb. 9, 2010
7645381 Water dispenser and filter cartridge for use therein Jan. 12, 2010
7635429 Fluid filter element Dec. 22, 2009
7527739 Apparatus, system, and method for multistage water separation May. 5, 2009
7479219 Filter device for fluids and method for filtering fluids Jan. 20, 2009
7445711 Filter cartridge and an assembly of a filter housing and at least one such filter cartridge Nov. 4, 2008
7344579 Pipe trap Mar. 18, 2008
7323106 Multi-element filter with multiple pleat channel height Jan. 29, 2008
7279091 Filter device Oct. 9, 2007

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