Patents-Review.com
ClassID:

28894 ⎘

B01D24/4631 - CPC Classification

Classification description:

Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof; Regenerating the filtering material in the filter Counter-current flushing, e.g. by air

Sub-classes:
Recent Application in this class:
#1
20260138055
2026-05-21

Method and System for Anchoring an Underdrain

 #2
20260115630
2026-04-30

FILTRATION APPARATUS

 #3
20260061345
2026-03-05

DEVICES AND METHODS FOR MOVING, REMOVING AND/OR INSTALLING ONE OR MORE COMPONENTS OF A TREATMENT UNIT

 #4
20250345726
2025-11-13

ENCLOSED MEDIA FLUID FILTRATION DEVICE

 #5
20250256986
2025-08-14

METHOD AND PACKAGED SYSTEM FOR FILTERING WATER

 #6
20250186908
2025-06-12

MEDIA RETENTION PLATE FOR A BLOCK UNDERDRAIN SYSTEM

 #7
20250050245
2025-02-13

WATER TREATMENT SYSTEM AND METHOD INCLUDING A DRAFT TUBE SYSTEM AND EDUCTOR

 #8
20240390828
2024-11-28

DEVICE AND METHOD FOR HARMLESS TREATMENT AND REGENERATION OF WASTE LIQUID DISCHARGE DURING WATER GLASS MOLD SHELL HARDENED WITH AMMONIUM CHLORIDE SOLUTION

 #9
20240390822
2024-11-28

DEVICES AND METHODS FOR MOVING, REMOVING AND/OR INSTALLING ONE OR MORE COMPONENTS OF A TREATMENT UNIT

 #10
20240335770
2024-10-10

Media retention plate for a block underdrain system

 #11
20240246011
2024-07-25

LAYERED MEDIA BACKWASH WITH INTERNAL DRAFT TUBE

 #12
20240238699
2024-07-18

APPARATUS FOR PREVENTING IMPURITIES IN A WASHING FLUID FROM CLOGGING AN UNDERDRAIN AND METHODS FOR PREVENTING CLOGGING OF THE UNDERDRAIN AND/OR MONITORING THE APPARATUS

 #13
20230381690
2023-11-30

DATE SEED POWDER FOR WATER FILTRATION TREATMENT

 #14
20230372846
2023-11-23

Filter assembly

 #15
20230365429
2023-11-16

Method and packaged system for filtering water

 #16
20230364530
2023-11-16

Fluid filtering apparatus and method

 #17
20230149835
2023-05-18

REGENERABLE SYSTEM AND METHOD FOR FILTERING MICROFIBRES FROM A WASTE LIQUID

 #18
20230112945
2023-04-13

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

 #19
20230090606
2023-03-23

Sand filter LED status light

 #20
20230087869
2023-03-23

HYBRID FILTER ASSEMBLY AND METHOD

 #21
20230069293
2023-03-02

Environmentally friendly water intake and pretreatment system

 #22
20230059255
2023-02-23

METHOD AND SYSTEM FOR DETERMINING LIQUID LEVELS IN SAND FILTERS AND EFFECTIVE AIR SCOURING DURING BACKWASH

 #23
20230053228
2023-02-16

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

 #24
20230001331
2023-01-05

Decanting backwash receiver

 #25
20220379242
2022-12-01

Date seed powder for water filtration treatment

 #26
20220176276
2022-06-09

Multilayer Media Bed Filter with Improved Backwash

 #27
20220134260
2022-05-05

Enclosed media fluid filtration device

 #28
20220134258
2022-05-05

Nutrient Removal Filtration System and Method

 #29
20220127175
2022-04-28

Method of purifying natural water and wastewater

 #30
20220096968
2022-03-31

FILTER SYSTEM FOR TREATING CONTAMINATED LIQUIDS

 #31
20220040610
2022-02-10

Filter assembly

 #32
20220008842
2022-01-13

Fluid filtering apparatus and method

 #33
20210394096
2021-12-23

Multilayer Media Bed Filter Comprising Glass Bead Micromedia

 #34
20210339173
2021-11-04

Devices and methods for moving, removing and/or installing one or more components of a treatment unit

 #35
20210268413
2021-09-02

Filter assembly

 #36
20210229002
2021-07-29

Enclosed media fluid filtration device

 #37
20210220759
2021-07-22

Filter backwash control system for a water or wastewater treatment system to conserve water during the filter backwash process

 #38
20210220758
2021-07-22

Filter backwash control system for a water or wastewater treatment system to conserve water during the filter backwash process

 #39
20210086108
2021-03-25

Scrubbing backwash filter

 #40
20210052994
2021-02-25

UNDERDRAIN ASSEMBLY

 #41
20210002145
2021-01-07

Particulate filtering device with a multi-layer water distribution and collection structure and method for using the same

 #42
20200316496
2020-10-08

Nutrient removal filtration system and method

 #43
20200230528
2020-07-23

Sand filter LED status light

 #44
20200206654
2020-07-02

Apparatus for filtering liquids

 #45
20200179829
2020-06-11

GRANULAR FILTRATION SYSTEM FOR AGRICULTURAL IRRIGATION

 #46
20200155976
2020-05-21

Enclosed media fluid filtration device

 #47
20200114284
2020-04-16

Devices and methods for moving, removing and/or installing one or more components of a treatment unit

 #48
20200108332
2020-04-09

Combination Of An Integrated Skimmer With A Deep Bed Media Filter

 #49
20200016517
2020-01-16

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

 #50
20190275448
2019-09-12

Filter backwash control system for a water or wastewater treatment system to conserve water during the filter backwash process

 #51
20190263677
2019-08-29

Environmentally friendly water intake and pretreatment system

 #52
20190218764
2019-07-18

Underdrain assembly

 #53
20190023587
2019-01-24

PRODUCED WATER FILTRATION

 #54
20180339246
2018-11-29

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

 #55
20180229156
2018-08-16

Energy reduction and monitoring control system for backwashing media systems

 #56
20180194090
2018-07-12

Method for producing a pattern in or on a support

 #57
20180126301
2018-05-10

Filter backwash nozzle

 #58
20180099237
2018-04-12

Multilayer Media Bed Filter with Improved Backwash

 #59
20180093231
2018-04-05

Apparatus and method for removing impurities from water or wastewater

 #60
20180078880
2018-03-22

FILTER BED BACKWASH SYSTEM AND PROCESS WITH RECYCLED GAS

 #61
20180078879
2018-03-22

Enclosed media fluid filtration device

 #62
20180050283
2018-02-22

Infiltration intake system

 #63
20180028946
2018-02-01

REGENERATION METHOD FOR FILTRATION APPARATUS, FILTRATION APPARATUS AND WATER TREATMENT APPARATUS

 #64
20170348618
2017-12-07

FILTER MEDIUM, PROCESS FOR PRODUCING FILTER MEDIUM, FILTRATION DEVICE, METHOD FOR OPERATING FILTRATION DEVICE, AND FILTRATION SYSTEM

 #65
20170319989
2017-11-09

Filter underdrain with internal air scour laterals

 #66
20170314282
2017-11-02

Fluid circulation monitoring system

 #67
20170304748
2017-10-26

Apparatus for removing impurities from water or wastewater

 #68
20170120170
2017-05-04

Synthetic compressible medium filter backwash processes

 #69
20170113164
2017-04-27

Enclosed media fluid filtration device

 #70
20170080360
2017-03-23

ENERGY REDUCTION AND MONITORING CONTROL SYSTEM FOR BACKWASHING MEDIA SYSTEMS

 #71
20170043282
2017-02-16

Embedded influent diffuser for floating media filter

 #72
20170036201
2017-02-09

SORDS PURIFICATION by LBPSE A System And Method For Processing Backwashed Catalyst Ret

 #73
20170001130
2017-01-05

Filter structure

 #74
20170001126
2017-01-05

Method and apparatus for evaporating waste fluids

 #75
20160340209
2016-11-24

WATER TREATMENT APPARATUS AND WATER TREATMENT METHOD USING THE SAME

 #76
20160339362
2016-11-24

Filter backwash nozzle

 #77
20160317952
2016-11-03

Coated granular filtration media

 #78
20160256800
2016-09-08

Multiple rate filter underdrain lateral gas metering plate

 #79
20160250571
2016-09-01

Scrubbing backwash filter

 #80
20160243468
2016-08-25

Fluid filtration system

 #81
20160236117
2016-08-18

Liquid filter device

 #82
20160121240
2016-05-05

Wall adaptor for filter underdrain

 #83
20160114265
2016-04-28

Integrated unit for intake and pretreatment with local backwashing

 #84
20160096750
2016-04-07

SEALING STRUCTURE AND FLUID TREATMENT UNIT

 #85
20160067633
2016-03-10

Open filtration device for a water treatment station

 #86
20160051908
2016-02-25

FILTER APPARATUS AND METHODS FOR PROVIDING BOILER FEED WATER

 #87
20160016817
2016-01-21

Fluid treatment apparatus including granular treatment medium

 #88
20160002941
2016-01-07

HIGH EFFICIENCY, LOW-PRESSURE FILTRATION UNIT

 #89
20150376889
2015-12-31

Underdrain assembly

 #90
20150343335
2015-12-03

Apparatus for securing underdrain filter block

 #91
20150314221
2015-11-05

CLEANING SYSTEM FOR SAND FILTRATION LAYER

 #92
20150314220
2015-11-05

FILTRATION ARRANGEMENT AND METHOD

 #93
20150273364
2015-10-01

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

 #94
20150258474
2015-09-17

Filtration operator

 #95
20150196858
2015-07-16

Underdrain filter block

 #96
20150136679
2015-05-21

Ion exchanging apparatus

 #97
20150068989
2015-03-12

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

 #98
20150068988
2015-03-12

Method for washing a filter for filtering water or wastewater

 #99
20150041378
2015-02-12

Device for purifying a water sink

 #100
20150014259
2015-01-15

DUAL PARALLEL LATERAL WITH INTERNAL AIR DISTRIBUTION PIPE

 #101
20150008195
2015-01-08

Method for washing a filter having at least two layers of filtering media, in particular for filtering seawater, and equipment for implementing said method

 #102
20140360591
2014-12-11

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

 #103
20140332458
2014-11-13

REGENERATIVE FLUID FILTRATION MICRO-CELL

 #104
20140263075
2014-09-18

Compositions and methods for cleaning water filtration media

 #105
20140251439
2014-09-11

Underdrain and method for transferring forces and directing flow

 #106
20140131262
2014-05-15

Apparatus for filtering water or wastewater

 #107
20140014562
2014-01-16

Dissolved air flotation-type pretreatment apparatus

 #108
20130299409
2013-11-14

Floating filter media filtration system with backwash

 #109
20130240433
2013-09-19

Apparatus for filtering water or wastewater

 #110
20130199990
2013-08-08

Apparatus for securing underdrain filter block

 #111
20130180906
2013-07-18

Filter media retainer assembly

 #112
20130180904
2013-07-18

UNDERWATER FILTRATION OPERATOR

 #113
20130168331
2013-07-04

Means for Cleaning Packed Media In a Wastewater Filter Treatment System

 #114
20130068675
2013-03-21

Unit, assembly and apparatus for treating fluid

 #115
20130056402
2013-03-07

SEALING STRUCTURE, FLUID TREATMENT UNIT, FLUID TREATMENT DEVICE AND MANUAL SWITCHING MECHANISM THEREFOR

 #116
20120292245
2012-11-22

Filtration media cleaning apparatus

 #117
20120211444
2012-08-23

Method of washing a particulate filter bed using an underdrain

 #118
20120111777
2012-05-10

Method of installing an air scour system into a filter bed

 #119
20110278238
2011-11-17

Method of filtering water or wastewater

 #120
20110278220
2011-11-17

Coiled continuous flow water treatment apparatus and method

 #121
20110226687
2011-09-22

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

 #122
20110174719
2011-07-21

Underdrain filter block including a grout chamber

 #123
20110147321
2011-06-23

FILTER WITH ADJUSTABLE POROSITY

 #124
20110073549
2011-03-31

Clog resistant media retainer assembly

 #125
20100320159
2010-12-23

Method and device for cleaning non-fixed media filters

 #126
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

 #127
20100282651
2010-11-11

Method and apparatus for monitoring an underdrain of a filter system

 #128
20100270218
2010-10-28

Syphon filtration system

 #129
20100213143
2010-08-26

Apparatus for inhibiting fines carryover

 #130
20100206795
2010-08-19

DISTRIBUTOR FOR DOMESTIC WATER FILTERS

 #131
20100176071
2010-07-15

Water treatment apparatus and a method for cleaning a filter layer of a water treatment apparatus

 #132
20100089810
2010-04-15

Water filtration apparatus

 #133
20090294356
2009-12-03

Backwashing unsaturated wastewater filter

 #134
20090277849
2009-11-12

Biological cleaning filter apparatus and system for aqua-culture

 #135
20090166277
2009-07-02

METHOD OF CLEANSING FILTRATION MEDIA AND SYSTEM THEREOF

 #136
20090071914
2009-03-19

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

 #137
20090014374
2009-01-15

System method for interlocking support blocks

 #138
20080245750
2008-10-09

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

 #139
20080121580
2008-05-29

Geometrically Variable Filter Underdrain Header

 #140
20080099412
2008-05-01

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

 #141
20080099411
2008-05-01

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

 #142
20070190865
2007-08-16

System and method for interlocking support blocks

 #143
20070175832
2007-08-02

Method and apparatus for monitoring an underdrain of a filter system

 #144
20070163939
2007-07-19

Distributor for water conditioner

 #145
20070158278
2007-07-12

Sand filter cleaning apparatus and method thereof

 #146
20070125694
2007-06-07

Filtration device

 #147
20070113870
2007-05-24

Method of cleansing filtration media and system therefor

 #148
20070108138
2007-05-17

Fluid treatment device

 #149
20070102337
2007-05-10

Deep bed filter

 #150
20070039867
2007-02-22

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

 #151
20060175262
2006-08-10

Method of operating a fluid treatment device employing a non-bonded media

 #152
20060163176
2006-07-27

Apparatus for inhibiting fines carryover

 #153
20060131221
2006-06-22

Quick countercurrent-type water purifier

 #154
20060124527
2006-06-15

Filter devices including a porous body

 #155
20060118473
2006-06-08

Apparatus for directing fluids through a filter system

 #156
20060113234
2006-06-01

Underdrain system

 #157
20060086653
2006-04-27

Filter having a media retaining plate

 #158
20060027511
2006-02-09

Method and apparatus for increasing filter contaminant loading capacity

 #159
20050252843
2005-11-17

Filter device

 #160
20050194302
2005-09-08

Underdrain system

 #161
20050161412
2005-07-28

Filter apparatus backwash removal device and backwash removal method

 #162
20050161411
2005-07-28

Apparatus and method for filtering fluids with multi-material filter media

 #163
20050133434
2005-06-23

Underdrain apparatus and method of manufacturing same

 #164
20050133432
2005-06-23

Fluidizable device

 #165
20050109706
2005-05-26

Filter underdrain system for backwash flow and method for measuring same

 #166
20050011825
2005-01-20

Filter device for garden ponds or similar

 #167
18774222
2025-07-01

Underdrain for wastewater filtration container

 #168
18198008
2026-03-31

Lightweight fibrous media (LFM) filter

 #169
16137156
2019-05-14

Filter backwash control system for a water or wastewater treatment system to conserve water during the filter backwash process

 #170
15710033
2019-10-22

Underdrain assembly for wastewater treatment

 #171
15658864
2019-08-20

Restrictive up flow media filter with servicing system

 #172
15248202
2019-01-22

Nutrient removal filtration system and method

 #173
14823847
2017-01-17

Method of replacing filter media

 #174
12799856
2015-09-01

Method and apparatus for longitudinally disposed, sharp pulse of liquid