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Class Information
Number: 210/497.2
Name: Liquid purification or separation > Filter > Supported, shaped or superimposed formed mediums > Cylindrical, conical, or trough shape > Filter blank
Description: Apparatus in an unassembled form capable of being formed in a cylindrical, conical, or trough shape.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8561524 Beverage brewing device Oct. 22, 2013
8221813 Single-serve permeable beverage filter and method of using same Jul. 17, 2012
7497887 Device for separating impurities from the lubricating oil of an internal combustion engine Mar. 3, 2009
7297271 Titanium powder sintered compact Nov. 20, 2007
7255722 Gas filter Aug. 14, 2007
6739460 Non-contaminating paint strainer May. 25, 2004
6722508 Removable cartridge assembly for filtering bi-directional axial flow and radial flow and method of making same Apr. 20, 2004
6662955 Beverage ingredient filter and assembly Dec. 16, 2003
6047834 Process for the manufacture of a sifting device with slit-shaped openings and an appropriately manufactured sifting device Apr. 11, 2000
5980744 Beaded center tube Nov. 9, 1999
5873999 Sieving and filtration screen Feb. 23, 1999
5804128 Cylindrical filter and process for producing the same Sep. 8, 1998
5770077 Laminated filter material Jun. 23, 1998
5744036 Pleated filter arrangement Apr. 28, 1998
5741421 Filter device Apr. 21, 1998
5736042 Conical filter having bonded end flaps Apr. 7, 1998
5733452 Filter and end cap assembly including a porous layer for sealing with a potting material and method for making the assembly Mar. 31, 1998
5688588 Water purification device Nov. 18, 1997
5679251 Wound oil filter Oct. 21, 1997
5674393 Oil filter Oct. 7, 1997
5670044 Cylindrical filter and process for producing the same Sep. 23, 1997
5639369 Filter element Jun. 17, 1997
5616242 Two stage bottle filter for the removal of sediment Apr. 1, 1997
5605625 Filter assembly Feb. 25, 1997
5599449 Tubular elastic frame with a continuous slot spanned by a filter material Feb. 4, 1997
5593587 Cell strainer Jan. 14, 1997
5589067 Expanded metal filter support structure Dec. 31, 1996
5549826 Filtration bag Aug. 27, 1996
5509666 Protected seal assembly and protective filter unit therefor Apr. 23, 1996
5482622 Filter for installation in an annular groove Jan. 9, 1996
5476585 Removably mounted hollow filter element and core Dec. 19, 1995
5468382 Depth filter media Nov. 21, 1995
5460721 Helical wound tube Oct. 24, 1995
5456833 Ceramic foam filter having a protective sleeve Oct. 10, 1995
5456475 Protected seal assembly and protective filter unit therefor Oct. 10, 1995
5429745 Cylindrical filter formed of stacked fibers having a high and low melting point component Jul. 4, 1995
5417860 Bottle filter and pouring device May. 23, 1995
5401409 Tubular knitted filter cover and process for preventing runs Mar. 28, 1995
5393425 Irrigation system lateral pickup pipe strainer Feb. 28, 1995
5384044 Fluid separation devices and methods of making same Jan. 24, 1995
5384046 Screen element Jan. 24, 1995
5368728 Paint strainer assembly Nov. 29, 1994
5350515 Internally potted end cap for a pleated filter medium Sep. 27, 1994
5326472 Filter for rapid extraction of the aromatic substances of a product by a liquid under pressure, and an apparatus equipped with a filter of this type Jul. 5, 1994
5316678 Filter cell seal assembly May. 31, 1994
5290446 Helical wrapped filter element Mar. 1, 1994
5279731 Depth filter media Jan. 18, 1994
5275729 Pleated liquid filter having zones of different filtration Jan. 4, 1994
5273650 Ceramic filter Dec. 28, 1993
5269925 Filter comprising multiple layers of non-woven filter fabric of decreasing porosity Dec. 14, 1993

1 2 3










 
 
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