ClassID:

86664

C02F2305/00 - CPC Classification

Classification description:

Use of specific compounds during water treatment

Sub-classes:
Recent Application in this class:
#1
20260125290
2026-05-07

Methods and Systems of Nitrate Removal in Aqueous Systems for Improved PFAS Destruction

#2
20260070825
2026-03-12

Systems and Methods for Water Treatment Using Ion Exchange and Water Softening Techniques

#3
20260055015
2026-02-26

USE OF POLYCARBOXYLATED-BETA-AMINO ALCOHOLS FOR DISSOLUTION OF INORGANIC SALTS

#4
20260042692
2026-02-12

TREATMENT METHOD FOR FULL RESOURCE RECOVERY FROM SLUDGE IN MUNICIPAL WASTEWATER TREATMENT PLANTS

#5
20260001791
2026-01-01

METHOD AND SYSTEM OF REMOVING ENVIRONMENTAL CONTAMINANTS FROM WATER

#6
20250382208
2025-12-18

System and Method for Producing and Purifying Alkalinity for Addition to a Body of Water

#7
20250368554
2025-12-04

TREATMENT METHOD FOR FLUORINE- AND ALUMINUM-CONTAINING WATER

#8
20250333346
2025-10-30

METHODS OF PRODUCTION AND USE OF RARE EARTH ENHANCED COAGULANTS

#9
20250333338
2025-10-30

METHODS FOR MONITORING BIOFOULING IN CLOSED WATER SYSTEMS

#10
20250320140
2025-10-16

USE OF MEDIUM CHAIN PERACIDS FOR BIOFILM INHIBITION IN INDUSTRIAL RECIRCULATING WATER SYSTEMS

#11
20250304476
2025-10-02

METHOD FOR TREATING POLLUTED ACIDIC WASTEWATER FROM SMELTING WITH ACTIVATED PYRITE CONCENTRATE

#12
20250282660
2025-09-11

SYSTEMS AND METHODS OF REMOVING PER- AND POLYFLUOROALKYL SUBSTANCES (PFAS) WITH CALCIUM OXIDE

#13
20250276928
2025-09-04

A METHOD FOR TREATING AQUEOUS EFFLUENTS WITH ORGANIC CONTENT, PARTICULARLY OIL MILL EFFLUENTS

#14
20250271138
2025-08-28

METHOD AND APPARATUS FOR PROCESSING LIQUID WASTE STREAMS

#15
20250197257
2025-06-19

CHEMICAL COMPOSITION FOR INCREASING DENSITY OF LIQUIDS

#16
20250145503
2025-05-08

METHODS AND SYSTEMS OF NITRATE REMOVAL IN AQUEOUS SYSTEMS FOR IMPROVED PFAS DESTRUCTION

#17
20250115499
2025-04-10

ADVANCED DEFLUORINATION AGENT AND METHOD FOR REMOVING FLUORIDE IONS IN FLUORIDE-CONTAINING WASTEWATER

#18
20250115498
2025-04-10

TWO-STAGE SYSTEM AND METHOD FOR TREATING FLUORIDE-CONTAINING WASTEWATER

#19
20250083975
2025-03-13

MEDIA MIXTURE FOR WATER TREATMENT

#20
20250059070
2025-02-20

AMMONIA AND NUTRIENT ION RECOVERY FROM MANURE WASTEWATER AND ELECTROSYNTHESIS OF VALUE-ADDED CHEMICALS USING ION SELECTIVE REDOX MATERIAL

#21
20250051185
2025-02-13

METHOD FOR REDUCING A CONTENT OF FORMALDEHYDE IN AN AQUEOUS MEDIUM

#22
20250019326
2025-01-16

ANTI-FOULING DISPERSANT COMPOSITION AND METHOD OF USE

#23
20240409445
2024-12-12

METHODS OF TREATING WATER TO REMOVE CONTAMINANTS AND WATER TREATMENT PLANTS FOR THE PRACTICE THEREOF

#24
20240409442
2024-12-12

Method for in situ regeneration of an adsorbent medium

#25
20240308889
2024-09-19

Production of H2S For Efficient Metal Removal From Effluents

#26
20240308878
2024-09-19

WATER TREATMENT SYSTEM, WATER TREATMENT METHOD, AND AMINE SOLUTION

#27
20240300889
2024-09-12

MATERIALS AND METHODS FOR IODINE CAPTURE

#28
20240190732
2024-06-13

DRY POWDER MIXTURE FOR TOTAL PHOSPHORUS REMOVAL WITHIN WATER AND WASTEWATER TREATMENT

#29
20240116787
2024-04-11

PRODUCED WATER ANTIFOULANT COMPOSITIONS AND METHODS

#30
20240025777
2024-01-25

SYSTEM AND METHOD FOR REDOX POLYMER ELECTRODIALYSIS

#31
20230331599
2023-10-19

METHOD OF SULFATE REMOVAL FROM SEAWATER USING HIGH SALINITY PRODUCED WATER

#32
20230331598
2023-10-19

REMOVAL OF SULFATE FROM SEAWATER

#33
20230295009
2023-09-21

Model predictive control system and method using neural network to control dissolved oxygen and PH in seawater

#34
20230271855
2023-08-31

HIGH SALINITY WATER PURIFICATION PROCESSES AND SYSTEMS UTILIZING PERVAPORIZATION

#35
20230227337
2023-07-20

Method to treat nano-filtration membrane retentate for reuse in fracturing and drilling applications

#36
20230200309
2023-06-29

PLANT GROWTH PROMOTING SYSTEM RADIATING QUANTUM ENERGY

#37
20230167055
2023-06-01

Synthesis method of indole derivative capable of efficiently degrading perfluorinated compound (PFC)

#38
20230158458
2023-05-25

Calcium and/or Magnesium Additive for Membrane and Fouling Control and System and Process for Membrane Fouling Control Using the Additive

#39
20230058065
2023-02-23

Buffer-free process cycle for COsequestration and carbonate production from brine waste streams with high salinity

#40
20230016197
2023-01-19

Water salinizer

#41
20230009795
2023-01-12

METHOD AND SYSTEM OF REMOVING ENVIRONMENTAL CONTAMINANTS FROM WATER

#42
20220411301
2022-12-29

METHODS AND COMPOSITIONS FOR REMEDIATING CYANURIC ACID IN AQUEOUS LIQUIDS

#43
20220402796
2022-12-22

Crude oil sludge treatment agent, crude oil sludge treatment method and crude oil sludge treatment agent kit

#44
20220227644
2022-07-21

Systems and methods of removing per- and polyfluoroalkyl substances (PFAS) with calcium oxide

#45
20220177334
2022-06-09

Use of multiple charged ionic compounds derived from polyamines for waste water clarification

#46
20220024791
2022-01-27

METHODS FOR MONITORING BIOFOULING IN CLOSED WATER SYSTEMS

#47
20210403331
2021-12-30

BURNT AND GRANULATED CLAY AND METHOD FOR MANUFACTURING SAME

#48
20210402374
2021-12-30

METHOD FOR THE TREATMENT OF A POROUS SUBSTRATE

#49
20210391101
2021-12-16

METHOD OF PRODUCING PERMANENTLY STRUCTURED WATER

#50
20210331952
2021-10-28

Production of H2S for efficient metal removal from effluents

#51
20210309547
2021-10-07

Chemical injection and control system and method for controlling chloramines

#52
20210269343
2021-09-02

Anti-fouling dispersant composition and method of use

#53
20210261449
2021-08-26

Water treatment method and water treatment device

#54
20210230027
2021-07-29

Methods of treating water to remove contaminants and water treatment plants for the practice thereof

#55
20210221708
2021-07-22

Method for the desalination of seawater using solar energy

#56
20210197122
2021-07-01

Ionic liquid and forward osmosis process employing the same

#57
20210188671
2021-06-24

BUFFER-FREE PROCESS CYCLE FOR CO2 SEQUESTRATION AND CARBONATE PRODUCTION FROM BRINE WASTE STREAMS WITH HIGH SALINITY

#58
20210155513
2021-05-27

Method and system for abating the presence of a selected chemical substance in wastewater flowing in a wastewater channel system

#59
20210139654
2021-05-13

Method of producing metal nanoparticle-loaded biopolymer microgels

#60
20210139346
2021-05-13

Zero liquid discharge eutectic freeze desalination with intermediate cold liquid

#61
20210032138
2021-02-04

Whey preacid treatment of wastewater with high calcium concentration to promote anaerobic digestion and delay calcification

#62
20210032133
2021-02-04

Method and assembly for recovering magnesium ammonium phosphate

#63
20210024393
2021-01-28

ION REMOVAL SYSTEM

#64
20210017061
2021-01-21

Water separation from particulate materials

#65
20210002159
2021-01-07

Removing nitrate from water

#66
20200407239
2020-12-31

FILTER AND FILTER MEDIA FOR REMOVING ORGANIC ACID FROM WATER

#67
20200354242
2020-11-12

Chemical injection and control system and method for controlling chloramines

#68
20200339437
2020-10-29

Eco-friendly water filtration apparatus

#69
20200331780
2020-10-22

WATER IONIZATION SYSTEM AND METHOD

#70
20200325044
2020-10-15

Synthetic acid and associated methods

#71
20200317554
2020-10-08

Purification filter element and water purification cup

#72
20200071218
2020-03-05

ADSORBENT FOR ANAEROBIC DIGESTION PROCESSES

#73
20200071205
2020-03-05

Use of multiple charged ionic compounds derived from poly amines for waste water clarification

#74
20190367390
2019-12-05

Buffer-free process cycle for CO2 sequestration and carbonate production from brine waste streams with high salinity

#75
20190322544
2019-10-24

Hydrates for water desalination using iso-butane additive

#76
20190300400
2019-10-03

Synthetic acid and associated methods

#77
20190256389
2019-08-22

Antifoam formulations for the thermal desalination process of water

#78
20190256388
2019-08-22

Process for removing silica from produced water and other wastewater streams

#79
20190218128
2019-07-18

Additive-amplified microwave pretreatment of wastewater sludge

#80
20190160430
2019-05-30

Desalination processes and fertilizer production methods

#81
20190106334
2019-04-11

Selective scaling in desalination water treatment systems and associated methods

#82
20190016620
2019-01-17

Closed-loop bioregenerative water purification system for the international space station (ISS) and for sustainable mars exploration

#83
20180346496
2018-12-06

Multi-branched cationic phosphonium salt, forward osmosis extract employing the same and forward osmosis seawater desalination process

#84
20180230032
2018-08-16

Removing nitrate from water

#85
20180222775
2018-08-09

ELECTROLYZED WATER PRODUCTION DEVICE, ELECTROLYZED WATER PRODUCTION METHOD, AND ELECTROLYTIC BATH

#86
20180201519
2018-07-19

REMOVAL OF BIOLOGICAL CONTAMINANTS FROM AQUEOUS STREAMS WITH CERIUM (IV) OXIDE COMPOSITIONS

#87
20180194651
2018-07-12

Synthetic acid and associated methods

#88
20180093911
2018-04-05

Removing nitrate from water

#89
20180021700
2018-01-25

INORGANIC PARTICLE POLYMER HYBRIDS AND USES THEREOF

#90
20170341956
2017-11-30

SYSTEM FOR DYNAMIC FLUIDIZED LOADING OF A LIGAND UPON CARBON MEDIA AND METHODS ASSOCIATED THEREWITH

#91
20170340686
2017-11-30

Shigatoxin-producing F18 type bacteriophage esc-COP-1 and use thereof for inhibiting proliferation of shigatoxin-producing F18 type

#92
20170334754
2017-11-23

Synthetic acid and associated methods

#93
20170333499
2017-11-23

Enteroinvasive bacteriophage Esc-COP-4 and use thereof for inhibiting proliferation of enteroinvasive

#94
20170327393
2017-11-16

Water ionization system and method

#95
20170225981
2017-08-10

Production of highly ionized alkaline water using a combination of reducing metals and reductive minerals

#96
20170190597
2017-07-06

Water desalination system and method for fast cooling saline water using turbines

#97
20170081208
2017-03-23

Process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate and its use

#98
20170057840
2017-03-02

Process for extracting a surfactant using a boronic acid modified material

#99
20170050154
2017-02-23

Hydrophilic-oleophobic copolymer composition and uses thereof

#100
20170036930
2017-02-09

Process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate and its use

#101
20170021309
2017-01-26

Methods of conditioning membranes

#102
20170001891
2017-01-05

Activating agent for treatment of radioactive wastewater and method using the same for radioactive wastewater treatment

#103
20160362318
2016-12-15

Chemical injection and control system and method for controlling chloramines

#104
20160347633
2016-12-01

Bimetallic catalyst for high nitrate nitrogen reduction and selectivity and manufacturing methods thereof

#105
20160332167
2016-11-17

Gravity recovery system and method for recovery of heavy metals from sands and gravels

#106
20160311001
2016-10-27

In situ alkaline hydrolysis of subsurface contaminants using gaseous reactants

#107
20160297696
2016-10-13

Appliances for the treatment of water

#108
20160229722
2016-08-11

Synthetic acid and associated methods

#109
20160214029
2016-07-28

Mineral composition for generating small water clusters, a small water cluster generating device and a seawater desalination equipment using the same, and a small water cluster generating method

#110
20160153952
2016-06-02

Detection and recovery of chemical elements from fluids with tectrabrachion

#111
20160145133
2016-05-26

Method for treatment of a wastewater stream containing dissolved compounds or ions

#112
20160137526
2016-05-19

Selective scaling in desalination water treatment systems and associated methods

#113
20160130157
2016-05-12

Selective scaling in desalination water treatment systems and associated methods

#114
20160115051
2016-04-28

Treatment of Aqueous Systems

#115
20160101998
2016-04-14

Process for the reduction in microbial activity in protein product water processing tanks for increased tank water utility and conservation

#116
20160075573
2016-03-17

METHODS FOR TREATING A FLUID CONTAMINATED WITH BACTERIA

#117
20150353664
2015-12-10

Multivalent polymers for clay aggregation

#118
20150353390
2015-12-10

Synthetic acid and associated methods

#119
20150336804
2015-11-26

Compositions and methods for preparing copper-containing paper and uses thereof

#120
20150329388
2015-11-19

Dechlorination method and solution

#121
20150299100
2015-10-22

Sulfide scavengers, methods for making and methods for using

#122
20150266755
2015-09-24

Protein scaffolds for selective enrichment of metal ions

#123
20150259223
2015-09-17

ELECTROLYZED WATER PRODUCTION DEVICE, ELECTROLYZED WATER PRODUCTION METHOD, AND ELECTROLYTIC BATH

#124
20150217241
2015-08-06

DISPENSERS

#125
20150197439
2015-07-16

Use of celluloses in sludge dewatering, and sludge products thereof

#126
20150158749
2015-06-11

Selective extraction of anions from solution

#127
20150136712
2015-05-21

Hydrophilic-oleophobic copolymer composition and uses thereof

#128
20150136703
2015-05-21

TITANIUM-IMPREGNATED CARBON NANOTUBES FOR SELENIUM REMOVAL

#129
20150122729
2015-05-07

Method and apparatus for removing organic substances, nitrogen and phosphorus from highly concentrated organic waste water

#130
20150090665
2015-04-02

ACTIVATED SOLUTIONS FOR WATER TREATMENT

#131
20150076074
2015-03-19

SYNERGISTIC SILICA SCALE CONTROL

#132
20150076062
2015-03-19

Hydrogel-based decontamination of aqueous samples containing nanoparticles

#133
20150053622
2015-02-26

Method to treat flushing liquor systems in coke plants

#134
20150041407
2015-02-12

Process for the reduction in microbial activity in protein product water processing tanks for increased tank water utility and conservation

#135
20150041406
2015-02-12

Method of tracing chemical quantities using encapsulated fluorescent dyes

#136
20150027962
2015-01-29

Process for treating with a chemical compound a body of water used in aquaculture

#137
20150021514
2015-01-22

Stable salt-free polyaluminum chlorosulfates

#138
20150021274
2015-01-22

HYPERBRANCHED POLYMERS

#139
20150010458
2015-01-08

Process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate and its use

#140
20150005379
2015-01-01

WASTEWATER TREATMENT METHOD

#141
20150004256
2015-01-01

METHOD AND APPARATUS FOR DISINFECTING SEWAGE SLUDGE

#142
20150000358
2015-01-01

Utilization of iron salts to stabilize and/or disinfect biosolids

#143
20140360943
2014-12-11

Corrosion control composition for water treatment process

#144
20140360942
2014-12-11

Filtration medium comprising a metal sulfide

#145
20140360940
2014-12-11

Process for the preparation of an aqueous solution comprising at least one earth alkali hydrogen carbonate and its use

#146
20140356280
2014-12-04

Delamination of borosilicate layered zeolite

#147
20140228306
2014-08-14

Phenolic coatings and methods of making and using same

#148
20140224743
2014-08-14

Process and composition for the removal of hydrogen sulfide from industrial process fluids

#149
20140206630
2014-07-24

Phenolic coatings and methods of making and using same

#150
20140041690
2014-02-13

Synthetic acid and associated methods

#151
20130172623
2013-07-04

Sulfide scavengers, methods for making and methods for using

#152
20130112617
2013-05-09

Redox wastewater biological nutrient removal treatment method

#153
20130020265
2013-01-24

Composition for treatment of ballast water

#154
20120172221
2012-07-05

Process for treating with a chemical compound a body of water used in aquaculture

#155
20120160780
2012-06-28

METHOD FOR INHIBITION OF BROMATE FORMATION IN OZONATION OF WATER

#156
20120132285
2012-05-31

Method for treating a medium by saturating it with useful substances emitted by plants and a device for carrying out this method

#157
20120097595
2012-04-26

DEVICE FOR TREATING HYDROGEN PEROXIDE WATER

#158
20110097460
2011-04-28

Process for the reduction in microbial activity in protein product chilled water cooling tanks for increased tank water utility and conservation

#159
20090032407
2009-02-05

Device for the separation of mercury from caustic soda in chlor-alkali plants

#160
20060053572
2006-03-16

Pool cleaner with integral chlorine generator

#161
18759868
2025-01-21

Device for scale prevention in water systems incorporating magnetic field exposure and method

#162
17518719
2023-07-04

Stabilized electromagnetic base liquid, formation thereof and application to high-salt wastewater treatment

#163
16985816
2020-10-06

Method of reducing an organic pollutant in contaminated water

#164
16850761
2022-03-29

Method for treatment of a wastewater stream containing dissolved compounds or ions

#165
16512126
2020-01-14

Water separation from particulate materials

#166
14537117
2015-12-29

Selective scaling in desalination water treatment systems and associated methods

#167
14120455
2017-01-03

Method and apparatus for treating shale gas waste water

#168
14101332
2016-09-20

Combination unit for managing fluid