ClassID:

86228

C02F1/448 - CPC Classification

Classification description:

Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by pervaporation

Recent Application in this class:
#1
20260138095
2026-05-21

ORGANOSILICA MEMBRANE WITH POROUS INTERMEDIATE LAYER AND METHOD FOR PREPARING THE SAME

#2
20260084983
2026-03-26

A Tunable Apparatus for the Removal of Moisture from a Moisture-Containing Media

#3
20260022036
2026-01-22

PERVAPORATION MEMBRANE

#4
20260021456
2026-01-22

PERVAPORATION MEMBRANE

#5
20260021455
2026-01-22

PERVAPORATION MEMBRANE

#6
20260001039
2026-01-01

MEMBRANE SEPARATION SYSTEM AND METHOD FOR OPERATING MEMBRANE SEPARATION SYSTEM

#7
20250383329
2025-12-18

SYSTEMS AND METHODS FOR MEASURING COMPOSITION OF WATER

#8
20250382203
2025-12-18

RECOVERY OF FLUORIDE FROM FLUORIDE-CONTAINING WASTE WATER THROUGH MEMBRANE SEPARATION

#9
20250345753
2025-11-13

SOLAR SEAWATER DESALINATION MEMBRANE, PREPARATION METHOD AND SEAWATER DESALINATION TREATMENT METHOD THEREOF

#10
20250196067
2025-06-19

MEMBRANE SEPARATION SYSTEM AND METHOD FOR OPERATING MEMBRANE SEPARATION DEVICE

#11
20240382906
2024-11-21

ZEOLITE MEMBRANE COMPLEX AND SEPARATION METHOD

#12
20240278193
2024-08-22

ZEOLITE MEMBRANE COMPLEX AND MEMBRANE REACTOR

#13
20240173671
2024-05-30

METHOD AND APPARATUS FOR TREATING WASTEWATER

#14
20230294047
2023-09-21

Multilayered wire mesh-supported membranes for separation applications

#15
20230271855
2023-08-31

HIGH SALINITY WATER PURIFICATION PROCESSES AND SYSTEMS UTILIZING PERVAPORIZATION

#16
20230256397
2023-08-17

DUAL-LAYER MEMBRANE

#17
20230130077
2023-04-27

SEPARATION MEMBRANE

#18
20230129752
2023-04-27

Phenyl-modified polydimethylsiloxane (PDMS) separation membrane, fabrication method thereof, and use thereof in separation of aromatic compound

#19
20230105219
2023-04-06

SYSTEMS AND METHODS FOR REMOVING OR REDUCING WATER IN MIXTURES THAT INCLUDE T-BUTYL HYDROPEROXIDE

#20
20230001379
2023-01-05

POLYCRYSTALLINE METAL-ORGANIC FRAMEWORK MEMBRANES FOR SEPARATION OF MIXTURES

#21
20220220006
2022-07-14

DEVICE FOR CONTINUOUS SEAWATER DESALINATION AND METHOD THEREOF

#22
20220184557
2022-06-16

Solar-thermal membrane for dewatering aqueous organic-acid solutions

#23
20220176321
2022-06-09

System and Process for Hybrid Membrane Distillation-Pervaporation

#24
20220032237
2022-02-03

CMS membrane, method for the production thereof and use thereof

#25
20220024797
2022-01-27

In-situ resource utilization-derived water purification and hydrogen and oxygen production

#26
20220024774
2022-01-27

Method for synthesizing supported molecular sieve membrane by microwaves

#27
20210308627
2021-10-07

Dual-layer membrane and method for preparing same

#28
20210181167
2021-06-17

Systems and Methods for Measuring Composition of Water

#29
20210046424
2021-02-18

Forward osmosis performance improved membrane apparatus and method of separating solution using the same

#30
20200354240
2020-11-12

Electro oxidation membrane evaporator

#31
20200330923
2020-10-22

Vapor condenser enhanced by membrane evaporation

#32
20200316518
2020-10-08

Ambient water condenser system

#33
20200279987
2020-09-03

Thermoelectric power generation and mineral extraction from brines

#34
20200198994
2020-06-25

Methods and systems for separation of chloramines in aqueous solutions

#35
20200122096
2020-04-23

Dehydration method and dehydration apparatus providing increased water permeation

#36
20200062617
2020-02-27

METHOD AND APPARATUS FOR MINERALS AND WATER SEPARATION

#37
20200009507
2020-01-09

Water-alcohol separation system and water-alcohol separation method for producing alcohol

#38
20200001238
2020-01-02

Composite ionomer membrane tubing modules and system and methods incorporating same

#39
20190291054
2019-09-26

COMPOSITE ION CONDUCTING MEMBRANE TUBING AND PROCESS OF MAKING SAME

#40
20190263699
2019-08-29

In-situ resource utilization-derived water purification and hydrogen and oxygen production

#41
20190091630
2019-03-28

DEHYDRATION SYSTEM FOR AQUEOUS ORGANIC COMPOUNDS, OPERATION METHOD THEREFOR, AND DEHYDRATION METHOD

#42
20190062181
2019-02-28

Dehydration of water containing source of formaldehyde, and a method for producing an ethylenically unsaturated carboxylic ester

#43
20190022586
2019-01-24

Forward osmosis subsurface irrigation system and process

#44
20180269367
2018-09-20

Thermoelectric power generation and mineral extraction from brines

#45
20180111092
2018-04-26

Water distillation system

#46
20180071692
2018-03-15

SEPARATION OF WATER USING A MEMBRANE

#47
20180050309
2018-02-22

High selectivity copolyimide membranes for separations

#48
20170158635
2017-06-08

System and method for organic solvent purification

#49
20170150685
2017-06-01

Desalination membranes for subsurface irrigation

#50
20170084812
2017-03-23

Thermoelectric power generation and mineral extraction from brines

#51
20170073250
2017-03-16

Ionomer-membrane water processing apparatus

#52
20160375410
2016-12-29

Polybenzimidazole hollow fiber membranes and method for making an asymmetric hollow fiber membrane

#53
20160355414
2016-12-08

Method of removing hydrogen-sulfide from water

#54
20160304364
2016-10-20

Ionomer-membrane water processing methods

#55
20160207798
2016-07-21

Nanoporous graphene membrane for desalination of salt water

#56
20150353385
2015-12-10

HYDROPHOBIC PHOTOTHERMAL MEMBRANES, DEVICES INCLUDING THE HYDROPHOBIC PHOTOTHERMAL MEMBRANES, AND METHODS FOR SOLAR DESALINATION

#57
20150307369
2015-10-29

Systems and methods for reducing ammonia emissions from liquid effluents and for recovering the ammonia

#58
20150274562
2015-10-01

Wastewater Refinery

#59
20150251931
2015-09-10

Fracking Waste Water Recycling to Purified Steam for Energy Recovery

#60
20150231577
2015-08-20

Separation of water using a membrane

#61
20150114906
2015-04-30

SILYLATED MESOPOROUS SILICA MEMBRANES ON POLYMERIC HOLLOW FIBER SUPPORTS

#62
20150053616
2015-02-26

Dehydration of water containing source of formaldehyde, and a method for producing an ethylenically unsaturated carboxylic ester

#63
20140318945
2014-10-30

Distillation station

#64
20140102981
2014-04-17

Process for the purification of an aqueous stream coming from the Fischer-Tropsch reaction

#65
20120322119
2012-12-20

Separation process using a polyimide membrane

#66
20120091056
2012-04-19

Method for producing carbon film, carbon film and separator

#67
20120048803
2012-03-01

Vapor compression membrane distillation system and method

#68
20110290729
2011-12-01

Process for the production of ultra pure water using a membrane

#69
20110266219
2011-11-03

Process for separating liquid mixtures

#70
20110209391
2011-09-01

Process for the purification of an aqueous stream coming from the fischer-tropsch reaction

#71
20110203994
2011-08-25

Forward Osmosis Separation Processes

#72
20110180479
2011-07-28

ZERO LIQUID DISCHARGE WATER TREATMENT SYSTEM AND METHOD

#73
20100219124
2010-09-02

System and method for producing methane, an organic based fertilizer and usable water from animal waste

#74
20100218573
2010-09-02

System and method for producing an organic based fertilizer and usable water from animal waste

#75
20100187128
2010-07-29

Method and device for treating liquids, using an electrolytic stage

#76
20100176057
2010-07-15

Liquid filtration using pressure difference across a hydrophobic membrane

#77
20090321354
2009-12-31

Membrane Reactor for the Treatment of Liquid Effluents, Comprising a Membrane for Diffusion of an Oxidizing Gas and a Selective Membrane Defining a Reaction Space Between Said Membranes

#78
20090114594
2009-05-07

Pervaporation membranes highly selective for volatile solvents present in fermentation broths

#79
20060108286
2006-05-25

Method and device for the purification, especially desalination, of water

#80
20050139555
2005-06-30

Method of purifying Fischer-Tropsch derived water