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Class Information
Number: 210/337
Name: Liquid purification or separation > Plural distinct separators > Filters > In series for prefilt flow > Nested units
Description: Apparatus arranged in superimposed or nested relation, each unit being removable from the other.










Sub-classes under this class:

Class Number Class Name Patents
210/338 Concentric filter elements 143


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8679329 Filter system for positioning within a storm water sewer Mar. 25, 2014
8673141 Oil filter device Mar. 18, 2014
8652327 Filter with main and supplemental filter elements and optional bubble breaker Feb. 18, 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
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
8414767 Module for purifying a fluid, in particular water Apr. 9, 2013
8388834 Fuel filter 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
8307993 Filter apparatus Nov. 13, 2012
8282825 Cylindrical inline fluids filter Oct. 9, 2012
8277209 Screen/tray method and system for wet sulphur priller Oct. 2, 2012
8136674 Filter device and method for manufacturing the same Mar. 20, 2012
8128829 Cross flow filter device Mar. 6, 2012
8114285 Tri-flow filter element with venting Feb. 14, 2012
8114278 Fuel filter Feb. 14, 2012
8114287 Surface purveyed filtration device Feb. 14, 2012
8083941 Construction of the wedge filtration media laminated by wedge filter plate Dec. 27, 2011
7992723 Filter cartridge with inlet flow diffuser Aug. 9, 2011
7935255 Filter cartridge May. 3, 2011
7857974 Filter cartridge with snap fit connection Dec. 28, 2010
7771591 Filter system for catch basins Aug. 10, 2010
7749383 Filter cartridge with crush ribs Jul. 6, 2010
7527739 Apparatus, system, and method for multistage water separation May. 5, 2009
7524414 Apparatus for filtering out and collecting debris at a storm drain Apr. 28, 2009
7001507 Retention and removal of debris and pollutants from surface water runoff Feb. 21, 2006
6881330 Multi-stage EDM filter Apr. 19, 2005
6702941 Fluid treatment elements adapted for cross flow treatment Mar. 9, 2004
6585892 Concentrically-arranged flexible media and support basket with second stage cartridge filter Jul. 1, 2003
6572765 Filtering system for swimming pool Jun. 3, 2003
6569330 Filter coalescer cartridge May. 27, 2003
6495040 Septic tank filtering system Dec. 17, 2002
6491818 Suction strainer with an internal core tube Dec. 10, 2002
6478957 Filtering apparatus for a wastewater treatment tank Nov. 12, 2002
6416664 Waste water filter having multiple wall filter elements and outlet protection Jul. 9, 2002
6387261 Serviceable filter with bypass May. 14, 2002
6364120 Filter tub assembly for deep fryer Apr. 2, 2002
6331247 Septic tank filtering system Dec. 18, 2001
6241945 Modular combined pump, filtration, oxygenation and/or debubbler apparatus Jun. 5, 2001
6231758 Curb-inlet storm drain systems for filtering trash and hydrocarbons May. 15, 2001
6136190 Septic tank filtering system Oct. 24, 2000
6106707 Curb-inlet storm drain systems for filtering trash and hydrocarbons Aug. 22, 2000
6103115 Wastewater skimmings dewatering unit Aug. 15, 2000
5993372 Method and apparatus for collecting and containing hydrocarbon spills and leaks Nov. 30, 1999
5958226 Storm drain filter with removable debris tray Sep. 28, 1999
5954952 Stormwater catch basin filter assembly Sep. 21, 1999
5932098 Filtration apparatus for brewing and drinking coffee and like beverages and concurrently enabling a user to drink directly from the apparatus Aug. 3, 1999
5928506 Water purifier for drinking water Jul. 27, 1999
5908558 Method and apparatus for removing contaminants from fluid columns Jun. 1, 1999

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