Metal liner passivation and adhesion enhancement by zinc doping
US-2019371659-A1 · Dec 5, 2019 · US
Filtering {particles other than ions (filtering ions C25D21/22)}
Filtering {particles other than ions (filtering ions C25D21/22)} · 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 | C25D21/06 |
| Official title | Filtering {particles other than ions (filtering ions C25D21/22)} |
| Display label | Filtering {particles other than ions (filtering ions C25D21/22)} |
| Total patents | 142 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 9 |
| 2017 | 13 |
| 2018 | 20 |
| 2019 | 16 |
| 2020 | 18 |
| 2021 | 12 |
| 2022 | 17 |
| 2023 | 10 |
| 2024 | 16 |
| 2025 | 5 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System for treating solution for use in electroplating application and method for treating solution for use in electroplating application
US-2019345627-A1 · Nov 14, 2019 · US
Systems and methods for removing contaminants in electroplating systems
US-2019345624-A1 · Nov 14, 2019 · US
Leak checking method, leak checking apparatus, electroplating method, and electroplating apparatus
US-10458036-B2 · Oct 29, 2019 · US
System for treating solution for use in electroplating application and method for treating solution for use in electroplating application
US-10450667-B2 · Oct 22, 2019 · US
Apparatus and method for the continuous metallization of an object
US-2019284713-A1 · Sep 19, 2019 · US
Systems and methods for copper (i) suppression in electrochemical deposition
US-2019237335-A1 · Aug 1, 2019 · US
Plating apparatus
US-2019233964-A1 · Aug 1, 2019 · US
Removal of electroplating bath additives
US-2019203375-A1 · Jul 4, 2019 · US
Device intended for implementing an anodization treatment and anodization treatment
US-10329685-B2 · Jun 25, 2019 · US
Plating apparatus
US-10294576-B2 · May 21, 2019 · US
Separation of alpha emitting species from plating baths
US-10287702-B2 · May 14, 2019 · US
Systems and methods for tin antimony plating
US-2019100849-A1 · Apr 4, 2019 · US
Separation of alpha emitting species from plating baths
US-10167568-B2 · Jan 1, 2019 · US
Protecting anodes from passivation in alloy plating systems
US-2018371637-A1 · Dec 27, 2018 · US
Separation of alpha emitting species from plating baths
US-2018355504-A1 · Dec 13, 2018 · US
Separation of alpha emitting species from plating baths
US-10138568-B2 · Nov 27, 2018 · US
Apparatus and method for ionic liquid electroplating
US-10138567-B2 · Nov 27, 2018 · US
Protecting anodes from passivation in alloy plating systems
US-10106907-B2 · Oct 23, 2018 · US
Continuous modification of organics in chemical baths
US-2018298517-A1 · Oct 18, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25D21/06?
- CPC C25D21/06 is the Cooperative Patent Classification code for “Filtering {particles other than ions (filtering ions C25D21/22)}.”
- How many patents are filed under CPC C25D21/06 (Filtering {particles other than ions (filtering ions C25D21/22)})?
- Our database includes 142 publications tagged with this CPC code.
- Is patent activity under CPC C25D21/06 growing?
- Publication counts under this code: 16 in 2024 vs 5 in 2025 (latest complete years).