Patents-Review.com
ClassID:

28868 ⎘

B01D24/24 - CPC Classification

Classification description:

Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being provided in an open container Downward filtration, the container having distribution or collection headers or pervious conduits

Recent Application in this class:
#1
20250186908
2025-06-12

MEDIA RETENTION PLATE FOR A BLOCK UNDERDRAIN SYSTEM

 #2
20250099880
2025-03-27

Hydraulic sludge recovery system

 #3
20240335770
2024-10-10

Media retention plate for a block underdrain system

 #4
20240149190
2024-05-09

FLUIDIZED BED SORTER

 #5
20230112945
2023-04-13

Backwashable media bed filtration system and drop in retrofit kit for same

 #6
20230053228
2023-02-16

Apparatus and method to prevent downward flow of liquid during a gas only washing cycle

 #7
20210354057
2021-11-18

Enhanced shape support grid

 #8
20210340041
2021-11-04

STORMWATER FILTER UTILIZING A HYDROPONIC BED AS FILTERING COMPONENT

 #9
20210229003
2021-07-29

Underdrain assembly and method of manufacturing same

 #10
20210188660
2021-06-24

Modular underdrain systems

 #11
20210052994
2021-02-25

UNDERDRAIN ASSEMBLY

 #12
20210031125
2021-02-04

INTEGRATED UNIT FOR INTAKE AND PRETREATMENT WITH LOCAL BACKWASHING

 #13
20200290891
2020-09-17

Modular underdrain systems

 #14
20200246728
2020-08-06

Underdrain assembly and method of manufacturing same

 #15
20200245651
2020-08-06

Antimicrobial application system with recycle and capture

 #16
20200016517
2020-01-16

APPARATUS FOR REMOVING IMPURITIES FROM WATER OR WASTEWATER AND A METHOD OF INSTALLING A FLUID DISTRIBUTION SYSTEM THEREIN

 #17
20190218764
2019-07-18

Underdrain assembly

 #18
20190217224
2019-07-18

Underdrain assembly and method of manufacturing same

 #19
20190030464
2019-01-31

Antimicrobial application system with recycle and capture

 #20
20180369721
2018-12-27

Water storage in subsurface storm water basins

 #21
20180339246
2018-11-29

Underdrain for a filter system for filtering water or wastewater and a method of washing a filter system

 #22
20180333660
2018-11-22

Filter media retainer and underdrain system having a filter media retainer

 #23
20180333659
2018-11-22

Self-cleaning, groutless, filter underdrain

 #24
20180214796
2018-08-02

Underdrain assembly and method of manufacturing same

 #25
20180111849
2018-04-26

Filter device

 #26
20180021702
2018-01-25

Filter system with integral media retainer seal

 #27
20170348617
2017-12-07

Grout support installation method for filter underdrain system

 #28
20170319989
2017-11-09

Filter underdrain with internal air scour laterals

 #29
20170304748
2017-10-26

Apparatus for removing impurities from water or wastewater

 #30
20170296945
2017-10-19

Grout bridge for filter underdrain blocks

 #31
20170239595
2017-08-24

Underdrain assembly and method of manufacturing the same

 #32
20160256800
2016-09-08

Multiple rate filter underdrain lateral gas metering plate

 #33
20160243475
2016-08-25

Fluid flow accessory

 #34
20160193550
2016-07-07

Underdrain assembly and method of manufacturing the same

 #35
20160193549
2016-07-07

ANTIMICROBIAL APPLICATION SYSTEM WITH RECYCLE AND CAPTURE

 #36
20160121240
2016-05-05

Wall adaptor for filter underdrain

 #37
20160067633
2016-03-10

Open filtration device for a water treatment station

 #38
20150376889
2015-12-31

Underdrain assembly

 #39
20150343335
2015-12-03

Apparatus for securing underdrain filter block

 #40
20150273364
2015-10-01

Underdrain for a filter system for filtering water or wastewater and a method of washing a filter system

 #41
20150196858
2015-07-16

Underdrain filter block

 #42
20150190737
2015-07-09

Grout support installation method for filter underdrain system

 #43
20150068989
2015-03-12

Apparatus for removing impurities from water or wastewater and a method of installing a fluid distribution system therein

 #44
20150068988
2015-03-12

Method for washing a filter for filtering water or wastewater

 #45
20150021258
2015-01-22

Antimicrobial application system with recycle and capture

 #46
20150014236
2015-01-15

Portable Water Treatment Device

 #47
20140360591
2014-12-11

UNDERDRAIN FOR A FILTER SYSTEM FOR FILTERING WATER OR WASTEWATER AND A METHOD OF WASHING THE FILTER SYSTEM

 #48
20140356066
2014-12-04

Underdrain assembly and method of manufacturing the same

 #49
20140305856
2014-10-16

Quick-dry filter dewatering mobile process and apparatus

 #50
20140251439
2014-09-11

Underdrain and method for transferring forces and directing flow

 #51
20140166593
2014-06-19

Gas-liquid distribution technique for water or wastewater filters using underdrains

 #52
20140131262
2014-05-15

Apparatus for filtering water or wastewater

 #53
20140027369
2014-01-30

Enhanced shape support grid

 #54
20140021121
2014-01-23

Filter media retainer assembly

 #55
20130306542
2013-11-21

Underdrain for a filter system for filtering water or wastewater

 #56
20130199990
2013-08-08

Apparatus for securing underdrain filter block

 #57
20130180906
2013-07-18

Filter media retainer assembly

 #58
20130134086
2013-05-30

Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof

 #59
20120211444
2012-08-23

Method of washing a particulate filter bed using an underdrain

 #60
20120111777
2012-05-10

Method of installing an air scour system into a filter bed

 #61
20120103897
2012-05-03

Underdrain flume plate

 #62
20120097594
2012-04-26

Handle for underdrain

 #63
20120048793
2012-03-01

Underdrain system

 #64
20110278238
2011-11-17

Method of filtering water or wastewater

 #65
20110226687
2011-09-22

System and method for uniformly distributing a fluid through a filter bed in a filter

 #66
20110174719
2011-07-21

Underdrain filter block including a grout chamber

 #67
20110073549
2011-03-31

Clog resistant media retainer assembly

 #68
20100314305
2010-12-16

Underdrain apparatus

 #69
20100300954
2010-12-02

Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof

 #70
20100282651
2010-11-11

Method and apparatus for monitoring an underdrain of a filter system

 #71
20100237025
2010-09-23

Method and system for cleaning filter media support structures

 #72
20100089810
2010-04-15

Water filtration apparatus

 #73
20090269147
2009-10-29

Adjustable anchor rod

 #74
20090196967
2009-08-06

Application system with recycle and related use of antimicrobial quaternary ammonium compound

 #75
20090184038
2009-07-23

SYSTEM AND METHOD FOR REMOVING PARTICLES FROM A TREATMENT BASIN

 #76
20090127180
2009-05-21

Apparatus for combining solids thickening and dewatering in one vessel

 #77
20090071914
2009-03-19

Underdrain for a filter system for filtering water or wastewater and a method of washing the filter system

 #78
20090014374
2009-01-15

System method for interlocking support blocks

 #79
20080245750
2008-10-09

Apparatus and method for distributing gas and liquid during backwash in filter underdrain flumes using dual separation

 #80
20080190835
2008-08-14

Filter system

 #81
20080121580
2008-05-29

Geometrically Variable Filter Underdrain Header

 #82
20080099412
2008-05-01

System and method for uniformly distributing a fluid through a filter bed in a filter

 #83
20080099411
2008-05-01

System and method for uniformly distributing a fluid through a filter bed in a filter

 #84
20080000825
2008-01-03

Underdrain system

 #85
20070235382
2007-10-11

Underdrain system

 #86
20070190865
2007-08-16

System and method for interlocking support blocks

 #87
20070175832
2007-08-02

Method and apparatus for monitoring an underdrain of a filter system

 #88
20070023346
2007-02-01

Filter having a filter layer that forms a protective barrier to prevent clogging of a gravel-less underdrain and method of making the same

 #89
20060186062
2006-08-24

Filter support member and methods of use and fabrication

 #90
20060124527
2006-06-15

Filter devices including a porous body

 #91
20060118473
2006-06-08

Apparatus for directing fluids through a filter system

 #92
20060113234
2006-06-01

Underdrain system

 #93
20060086653
2006-04-27

Filter having a media retaining plate

 #94
20060006114
2006-01-12

Process for combining solids thickening and dewatering in one vessel

 #95
20050218061
2005-10-06

Snap locking underdrain block

 #96
20050194302
2005-09-08

Underdrain system

 #97
20050133434
2005-06-23

Underdrain apparatus and method of manufacturing same

 #98
20050109706
2005-05-26

Filter underdrain system for backwash flow and method for measuring same

 #99
20050067357
2005-03-31

Flow splitting weir

 #100
15710033
2019-10-22

Underdrain assembly for wastewater treatment