Impressed current cathodic protection system and a method of operating the system
US-12467148-B2 · Nov 11, 2025 · US
combining at least two types of anodic or cathodic protection
combining at least two types of anodic or cathodic protection · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C23F2213/21 |
| Official title | combining at least two types of anodic or cathodic protection |
| Display label | combining at least two types of anodic or cathodic protection |
| Total patents | 25 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 4 |
| 2018 | 4 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 2 |
| 2022 | 2 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Electrolysis device
US-2024191371-A1 · Jun 13, 2024 · US
Electrolysis device
US-2024183045-A1 · Jun 6, 2024 · US
Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters
US-11698209-B2 · Jul 11, 2023 · US
Systems and methods for providing monitored and controlled cathodic protection potential
US-11634822-B2 · Apr 25, 2023 · US
Impressed current cathodic protection system and a method of operating the system
US-2023096293-A1 · Mar 30, 2023 · US
Marine salinity measuring arrangement and method
US-2022349065-A1 · Nov 3, 2022 · US
Potential measuring device and method
US-2022128454-A1 · Apr 28, 2022 · US
Corrosion inhibiting additive
US-11091840-B2 · Aug 17, 2021 · US
Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters
US-2021063052-A1 · Mar 4, 2021 · US
Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters
US-10837673-B2 · Nov 17, 2020 · US
Systems and Methods for Providing Monitored and Controlled Cathodic Protection Potential
US-2019085468-A1 · Mar 21, 2019 · US
Corrosion inhibiting additive
US-2018320272-A1 · Nov 8, 2018 · US
Corrosion inhibiting additive
US-10023963-B2 · Jul 17, 2018 · US
Corrosion Protection System and Method for Use with Electrical Contacts
US-2018097325-A1 · Apr 5, 2018 · US
Cathodic Corrosion and Dry Fire Protection Apparatus and Methods for Electric Water Heaters
US-2018051910-A1 · Feb 22, 2018 · US
Corrosion inhibiting additive
US-2017350020-A1 · Dec 7, 2017 · US
System, apparatus, and method for utilization of bracelet galvanic anodes to protect subterranean well casing sections shielded by cement at a cellar area
US-9809888-B2 · Nov 7, 2017 · US
Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters
US-9803887-B2 · Oct 31, 2017 · US
Marine cathodic protection system
US-9790601-B2 · Oct 17, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C23F2213/21?
- CPC C23F2213/21 is the Cooperative Patent Classification code for “combining at least two types of anodic or cathodic protection.”
- How many patents are filed under CPC C23F2213/21 (combining at least two types of anodic or cathodic protection)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC C23F2213/21 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).