Apparatus and method for green hydrogen production using submerged desalination system
US-2024318323-A1 · Sep 26, 2024 · US
Removing impurities
Removing impurities · 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 | C25B15/085 |
| Official title | {Removing impurities} |
| Display label | Removing impurities |
| Total patents | 254 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 7 |
| 2020 | 11 |
| 2021 | 21 |
| 2022 | 34 |
| 2023 | 40 |
| 2024 | 54 |
| 2025 | 63 |
| 2026 | 9 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Membrane-less reactor design and process for biotransformation of carbon dioxide
US-11519084-B2 · Dec 6, 2022 · US
Electrolysis arrangement for alkaline electrolysis and method therefor
US-2022333260-A1 · Oct 20, 2022 · US
Hydrogen production system
US-11421329-B2 · Aug 23, 2022 · US
Method for removing non-proton cationic impurities from an electrochemical cell and an electrochemical cell
US-2022033986-A1 · Feb 3, 2022 · US
Production of chemical products using electrochemical flow systems and slug flow and associated methods
US-11236429-B2 · Feb 1, 2022 · US
Catalyst-free electrochemical deuteration method using deuterium oxide as deuterium source
US-2021404070-A1 · Dec 30, 2021 · US
Gas generator
US-11180858-B2 · Nov 23, 2021 · US
Hydrogen-oxygen generation system and hydrogen-oxygen generation method
US-2021355590-A1 · Nov 18, 2021 · US
Hydrogen production and storage system using solar energy independently operated without external power
US-2021292917-A1 · Sep 23, 2021 · US
Method and Device for the Electrochemical Utilization of Carbon Dioxide
US-2021285111-A1 · Sep 16, 2021 · US
Sustainable, facile separation of the molten carbonate electrolysis cathode product
US-2021277528-A1 · Sep 9, 2021 · US
Flow structures for use with an electrochemical cell
US-11105010-B2 · Aug 31, 2021 · US
Hydrogen production system
US-2021262100-A1 · Aug 26, 2021 · US
Gas production apparatus and gas production method
US-2021262101-A1 · Aug 26, 2021 · US
Sustainable, facile separation of the molten carbonate electrolysis cathode product
US-2021230758-A1 · Jul 29, 2021 · US
Metal sulfate manufacturing system via electrochemical dissolution
US-2021230757-A1 · Jul 29, 2021 · US
System for producing dihydrogen, and associated method
US-11060196-B2 · Jul 13, 2021 · US
Intermittent electrolysis streams
US-11053517-B2 · Jul 6, 2021 · US
Carbon Monoxide Production Process Optimized by SOEC
US-2021179436-A1 · Jun 17, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25B15/085?
- CPC C25B15/085 is the Cooperative Patent Classification code for “Removing impurities.”
- How many patents are filed under CPC C25B15/085 (Removing impurities)?
- Our database includes 254 publications tagged with this CPC code.
- Is patent activity under CPC C25B15/085 growing?
- Publication counts under this code: 54 in 2024 vs 63 in 2025 (latest complete years).