ClassID:

120689

C23F2213/32 - CPC Classification

Classification description:

Aspects of inhibiting corrosion of metals by anodic or cathodic protection; Anodic or cathodic protection specially adapted for a specific object Pipes

Recent Application in this class:
#1
20250377286
2025-12-11

METHOD AND SYSTEM FOR CORROSION PROTECTION

#2
20250341457
2025-11-06

SYSTEMS AND METHODS TO REMOTELY OBTAIN PIPELINE POTENTIALS

#3
20250270708
2025-08-28

PROTECTION SYSTEM FOR PIPELINES

#4
20250243588
2025-07-31

METHOD OF PREDICTING EXTERNAL CORROSION RISK ON BURIED GAS FLOWLINES

#5
20250243587
2025-07-31

METHODS AND SYSTEMS FOR DETECTING CATHODIC PROTECTION INTERFERENCE

#6
20240418629
2024-12-19

COATED STRUCTURE WITH A MONITORING SYSTEM, A MONITORING SYSTEM, AND A METHOD FOR MONITORING A CONDITION OF A COATED STRUCTURE

#7
20240288129
2024-08-29

METHODS AND INTERNET OF THINGS (IOT) SYSTEMS FOR INTELLIGENT DETECTION OF CATHOSIC PROTECTION IN SMART GAS PIPELINES

#8
20240200201
2024-06-20

SYSTEM AND METHOD FOR CATHODIC PROTECTION MONITORING

#9
20240191363
2024-06-13

Cathodic Protection Unit

#10
20240052500
2024-02-15

Cathodic protection of metal substrates

#11
20230323984
2023-10-12

MOUNTING AND CATHODIC PROTECTION

#12
20230235463
2023-07-27

SYSTEM AND METHOD FOR CATHODIC PROTECTION BY DISTRIBUTED SACRIFICIAL ANODES

#13
20220364243
2022-11-17

CATHODIC PROTECTION WAVEFORM MONITORING UNIT WITH ASYNCHRONOUS MONITORING

#14
20220326141
2022-10-13

Coated structure with a monitoring system, a monitoring system, and a method for monitoring a condition of a coated structure

#15
20210198789
2021-07-01

SYSTEMS, APPARATUSES, AND METHODS TO ASSESS CORROSION PREVENTION

#16
20210142931
2021-05-13

Provision of electrical continuity and/or radial support

#17
20210040623
2021-02-11

SAFETY SYSTEM AND METHOD FOR DE-COUPLING OF A CATHODICALLY PROTECTED STRUCTURE

#18
20210025808
2021-01-28

Apparatus for tank bottom soil side corrosion monitoring

#19
20200283914
2020-09-10

Double coupon reference cell and methods of making same

#20
20200232905
2020-07-23

Corrosion resistance tester for coated metal material

#21
20200216966
2020-07-09

Cathodic protection of metal substrates

#22
20200199765
2020-06-25

Corrosion protection system for heating ventalation air conditioning refrigeration

#23
20200141530
2020-05-07

Eliminating fouling in hydrocarbon pipelines by electrical techniques

#24
20200124362
2020-04-23

Flat extruded aluminum multi-port tube whose inner surface is highly corrosion-resistant and an aluminum heat exchanger using the tube

#25
20200102658
2020-04-02

Mounting and cathodic protection

#26
20200049280
2020-02-13

Connecting and cathodic protection

#27
20200017653
2020-01-16

Electrically-conductive compositions and methods of using them with pipelines

#28
20200010960
2020-01-09

Zinc ribbon anodes and associated methods

#29
20190353550
2019-11-21

Polymeric nanocomposite based sensor and coating systems and their applications

#30
20190145011
2019-05-16

Visual electrolytic corrosion indication and prevention apparatus

#31
20190127861
2019-05-02

Cathodic protection waveform monitoring unit with asynchronous monitoring

#32
20190113160
2019-04-18

Flange tab system

#33
20190078217
2019-03-14

Sacrificial electrode attachment structure and electrolytic apparatus including the same

#34
20190071842
2019-03-07

Hydraulic excavation and delivery device

#35
20190048477
2019-02-14

SYSTEM AND METHOD FOR CATHODIC PROTECTION BY DISTRIBUTED SACRIFICIAL ANODES

#36
20190040533
2019-02-07

Corrosion protection methods for the protection of the national infrastructure of copper/iron, copper, lead/iron potable water distribution systems and the national iron-based infrastructure

#37
20190032226
2019-01-31

CATHODIC PROTECTION OF COPPER PLUMBING SYSTEM FOR PREVENTION OF CORROSION

#38
20190010616
2019-01-10

Visual electrolytic corrosion indication and prevention apparatus

#39
20190003614
2019-01-03

Device for fixing pipes and tubes

#40
20180363149
2018-12-20

Systems, apparatuses, and methods to assess corrosion prevention

#41
20180298705
2018-10-18

Method of installing an unbonded flexible pipe

#42
20180266617
2018-09-20

Clamp for pipe

#43
20180230605
2018-08-16

Cathodic protection system monitoring

#44
20180222778
2018-08-09

Method and system for applying superimposed time-varying frequency electromagnetic wave to water to effect various treatment functions

#45
20180222777
2018-08-09

Method and system for applying superimposed time-varying frequency electromagnetic wave to target object or target region

#46
20180221821
2018-08-09

Method and system for applying superimposed time-varying frequency electromagnetic wave for removal of SO, COand NOfrom flue gases

#47
20180216246
2018-08-02

Method and system for applying superimposed time-varying frequency electromagnetic wave for corrosion protection of submerged and/or buried structures

#48
20180201526
2018-07-19

Method and system for applying superimposed time-varying frequency electromagnetic wave for marine ballast water bio-fouling control

#49
20180187314
2018-07-05

CATHODIC PROTECTION OF METAL SUBSTRATES

#50
20180180215
2018-06-28

Corrosion resistant buried underground ductile cast iron piping members with an improved external coating and the method thereof

#51
20180066369
2018-03-08

High efficiency cast iron anode

#52
20170350230
2017-12-07

Apparatus and Method for Detection of Corrosion

#53
20170328828
2017-11-16

ELECTRIC ANTICORROSIVE POTENTIAL MEASUREMENT ELECTRODE UNIT

#54
20170191171
2017-07-06

Fiber optics to monitor pipeline cathodic protection systems

#55
20170183784
2017-06-29

Anode slurry for cathodic protection of underground metallic structures and method of application thereof

#56
20170088956
2017-03-30

Double coupon reference cell and methods of making same

#57
20160369935
2016-12-22

Fluid-conducting system with cathodic corrosion protection

#58
20160289846
2016-10-06

Method and apparatus for corrosion inhibition

#59
20160237575
2016-08-18

System, apparatus, and method of providing cathodic protection to buried and/or submerged metallic structures

#60
20160230261
2016-08-11

Inexpensive automotive member and feed oil pipe, exhibiting excellent salt corrosion resistance

#61
20160167177
2016-06-16

High corrosion-resistant aluminum alloy brazing sheet, method of manufacturing such sheet, and corrosive-resistant heat exchanger using such sheet

#62
20160138173
2016-05-19

Marine cathodic protection system

#63
20150368809
2015-12-24

Cathodic protection management system

#64
20150329974
2015-11-19

System, apparatus, and method for utilization of bracelet galvanic anodes to protect subterranean well casing sections shielded by cement at a cellar area

#65
20150226365
2015-08-13

Iron-based piping element for buried pipeline, comprising an outer coating

#66
20150184788
2015-07-02

Pipeline and methods

#67
20150021200
2015-01-22

Protecting a metal surface from corrosion

#68
20150021169
2015-01-22

Double coupon reference cell and methods of making same

#69
20140251792
2014-09-11

Method and apparatus for controlling steel corrosion under thermal insulation (CUI)

#70
20140151241
2014-06-05

Pipeline communications

#71
20140016995
2014-01-16

Union between dissimilar materials

#72
20130134054
2013-05-30

Anodic devices and methods for reducing corrosion

#73
20130118915
2013-05-16

Sacrificial anode

#74
20130081955
2013-04-04

System, apparatus, and method for utilization of bracelet galvanic anodes to protect subterranean well casing sections shielded by cement at a cellar area

#75
20120205256
2012-08-16

Cathodic protection assessment probe

#76
20120152733
2012-06-21

Apparatus for use with metallic structures

#77
20120031751
2012-02-09

Multipurpose segmented titanium mixed metal oxide (MMO) coated anode with integrated vent

#78
20120031750
2012-02-09

Multipurpose segmented sacrificial anode

#79
20120006948
2012-01-12

Clamp for securing components

#80
20110290664
2011-12-01

Cased pipe internal cathodic protection apparatus and method

#81
20110240485
2011-10-06

Sacrificial anode system

#82
20110238347
2011-09-29

APPARATUS AND SYSTEM FOR AUTOMATED PIPELINE TESTING

#83
20110177358
2011-07-21

Protective coating for metal surfaces

#84
20110013988
2011-01-20

Assemblage and method for undersea laying of pipeline from a ship spool

#85
20110003165
2011-01-06

MULTI-LAYER ANTI-CORROSIVE COATING

#86
20100159272
2010-06-24

Clad metal sheet and heat exchanger tubing etc. made therefrom

#87
20100156637
2010-06-24

Method for detecting an intruder's path

#88
20100146374
2010-06-10

Wireless communications method

#89
20100141276
2010-06-10

Method for detecting unauthorized access

#90
20100139372
2010-06-10

Method for detecting leakage from a pipe

#91
20100101933
2010-04-29

Inhibition of corrosion of structures

#92
20100039127
2010-02-18

System for assessing pipeline condition

#93
20100027380
2010-02-04

Sensor unit having a directional aperture

#94
20100027235
2010-02-04

Distributed system with shielded sensors

#95
20090252986
2009-10-08

Anti-corrosive coating for metal surfaces

#96
20090229973
2009-09-17

Monitoring methods, systems and apparatus for validating the operation of a current interrupter used in cathodic protection

#97
20090114676
2009-05-07

Fuel dispensing apparatus having internal surface corrosion protection arrangement

#98
20080047842
2008-02-28

Control for galvanic corrosion inhibiting coupling

#99
20070251834
2007-11-01

Automatic potential control cathodic protection system for storage tanks

#100
20070246348
2007-10-25

Stabilizer with cathodic protection

#101
20060231503
2006-10-19

Water treatment device

#102
20050284771
2005-12-29

Corrosion protection apparatus and method

#103
20050224247
2005-10-13

Cathodic lead insulator