C23F 2213/21
Combining at least two types of anodic or cathodic protection
Official title: combining at least two types of anodic or cathodic protection
C23F2213/21 (Combining at least two types of anodic or cathodic protection) appears on 42 US grants and 47 published applications in this corpus.
Search patents in C23F- Granted patents
- 42
- Published applications
- 47
- Assignees
- 30
- Inventors
- 107
- Latest grant
- 11 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 2 | 4 |
| 2007 | 2 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 3 | 6 |
| 2012 | 4 | 2 |
| 2013 | 3 | 4 |
| 2014 | 1 | 3 |
| 2015 | 4 | 6 |
| 2016 | 2 | 1 |
| 2017 | 4 | 3 |
| 2018 | 3 | 3 |
| 2019 | 1 | 1 |
| 2020 | 2 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 2 |
| 2023 | 2 | 1 |
| 2024 | 0 | 3 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Impressed current cathodic protection system and a method of operating the system11 Nov 2025US 12,467,148 B2AB Volvo Penta
- Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters11 Jul 2023US 11,698,209 B2Rheem Manufacturing Company
- Systems and methods for providing monitored and controlled cathodic protection potential25 Apr 2023US 11,634,822 B2OneSubsea IP UK Limited
- Corrosion inhibiting additive17 Aug 2021US 11,091,840 B2Raytheon Technologies Corporation
- Cathodic corrosion and dry fire protection apparatus and methods for electric water heaters17 Nov 2020US 10,837,673 B2Rheem Manufacturing Company
- Cathodic corrosion protection27 Jun 2024US 2024/0209515 A1
- Electrolysis device13 Jun 2024US 2024/0191371 A1Siemens Energy Global GmbH & Co. KG
- Electrolysis device6 Jun 2024US 2024/0183045 A1Siemens Energy Global GmbH & Co. KG
- Impressed current cathodic protection system and a method of operating the system30 Mar 2023US 2023/0096293 A1AB Volvo Penta
- Marine salinity measuring arrangement and method3 Nov 2022US 2022/0349065 A1AB Volvo Penta
Most cited
By later US patents
- System for protecting gasifier surfaces from corrosion77US 8,372,251 B2General Electric Company · 2013
- Ionically conductive agent, system for cathodic protection of galvanically active metals, and method and apparatus for using same35US 5,650,060 AMinnesota Mining and Manufacturing Company · 1997
- Method of use of dual bed cathodic protection system with automatic controls32US 5,139,634 AColorado Interstate Gas Company · 1992
- System for inhibiting corrosion of submerged components in a marine propulsion system23US 8,118,983 B1Brunswick Corporation · 2012
- Battery-powered cathodic protection system22US 6,346,188 B1The Enser Corporation · 2002