Electrochemical cell and process for producing metal and chlorine gas
US-2023392272-A1 · Dec 7, 2023 · US
Diaphragms; Spacing elements
Diaphragms; Spacing elements · 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 | C25C7/04 |
| Official title | Diaphragms; Spacing elements |
| Display label | Diaphragms; Spacing elements |
| Total patents | 89 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 8 |
| 2017 | 1 |
| 2018 | 8 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 7 |
| 2023 | 10 |
| 2024 | 13 |
| 2025 | 12 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Water-impermeable carbon-based electrolyte and separation membrane and fabrication thereof
US-11779886-B1 · Oct 10, 2023 · US
Method and apparatus for extracting lithium from solution using bipolar electrodes
US-2023212769-A1 · Jul 6, 2023 · US
System and method for storing and generating electricity
US-2023203690-A1 · Jun 29, 2023 · US
Membrane-stacked electrolytic bath for lithium extraction from salt lakes by electrochemical intercalation/deintercalation
US-2023203687-A1 · Jun 29, 2023 · US
Li ION RECOVERY MEMBER AND Li RECOVERY DEVICE USING SAME
US-2023183876-A1 · Jun 15, 2023 · US
Cerium oxide nanoparticles, methods for fabricating the same and methods for fabricating a semiconductor device using the same
US-2023167566-A1 · Jun 1, 2023 · US
Method And System For Extracting Metal And Oxygen From Powdered Metal Oxides
US-2023131891-A1 · Apr 27, 2023 · US
Electrowinning cells for the segregation of the cathodic and anodic compartments
US-2023082450-A1 · Mar 16, 2023 · US
Method for cleanly extracting metallic silver
US-11566333-B2 · Jan 31, 2023 · US
Method and apparatus for producing electrolytic aluminum foil
US-11519090-B2 · Dec 6, 2022 · US
Electrolysis apparatus for the electrolytic production of oxygen from oxide-containing starting material
US-11479869-B2 · Oct 25, 2022 · US
Separator plate with a homogenized bead strength in the port region
US-2022336825-A1 · Oct 20, 2022 · US
Low temperature lithium production
US-11466375-B1 · Oct 11, 2022 · US
Method for producing metallic silver by electro-deposition
US-11384443-B2 · Jul 12, 2022 · US
Electrolytic reduction system and method of vanadium electrolyte
US-2022216495-A1 · Jul 7, 2022 · US
Method for cleanly extracting metallic silver
US-2022112616-A1 · Apr 14, 2022 · US
Production of lithium via electrodeposition
US-11201324-B2 · Dec 14, 2021 · US
Oxidation-resistant metallic tin
US-2021381082-A1 · Dec 9, 2021 · US
Electrolyzer
US-2021292918-A1 · Sep 23, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25C7/04?
- CPC C25C7/04 is the Cooperative Patent Classification code for “Diaphragms; Spacing elements.”
- How many patents are filed under CPC C25C7/04 (Diaphragms; Spacing elements)?
- Our database includes 89 publications tagged with this CPC code.
- Is patent activity under CPC C25C7/04 growing?
- Publication counts under this code: 13 in 2024 vs 12 in 2025 (latest complete years).