Water electrolysis system
US-2025333854-A1 · Oct 30, 2025 · US
producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO]
producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO] · 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 | C25B1/044 |
| Official title | producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO] |
| Display label | producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO] |
| Total patents | 49 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 8 |
| 2021 | 5 |
| 2022 | 10 |
| 2023 | 3 |
| 2024 | 6 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for underwater shock generation
US-12372341-B1 · Jul 29, 2025 · US
Compact hydrogen-oxygen generator
US-12305303-B2 · May 20, 2025 · US
Oxyhydrogen preparation device capable of adjusting hydrogen content and using method thereof
US-2025154665-A1 · May 15, 2025 · US
Gas generator
US-2025034723-A1 · Jan 30, 2025 · US
Gas generator
US-12146228-B2 · Nov 19, 2024 · US
Method for manufacturing a thin film composite membrane for alkaline water electrolysis
US-2024368784-A1 · Nov 7, 2024 · US
Hydrogen gas production systems and related electrolysis cells
US-12098467-B2 · Sep 24, 2024 · US
High-efficiency oxyhydrogen generation device for medical care and using method thereof
US-2024240329-A1 · Jul 18, 2024 · US
Bilayer shrinkage to assemble complex ceramic shapes
US-2024145734-A1 · May 2, 2024 · US
Compact portable oxyhydrogen generator
US-2024026550-A1 · Jan 25, 2024 · US
Mixed gas generating system with oxygen generator or breathing tube
US-2023347094-A1 · Nov 2, 2023 · US
Hydrogen production system and hydrogen production method
US-2023257889-A1 · Aug 17, 2023 · US
Asymmetric electrolyte membrane, membrane electrode assembly comprising the same, water electrolysis apparatus comprising the same and method for manufacturing the same
US-11649551-B2 · May 16, 2023 · US
Gas production apparatus and gas production method
US-11505872-B2 · Nov 22, 2022 · US
Reinforced separator for alkaline hydrolysis
US-11499240-B2 · Nov 15, 2022 · US
Electrolytic device
US-11479868-B2 · Oct 25, 2022 · US
A compact hydrogen-oxygen generator
US-2022298654-A1 · Sep 22, 2022 · US
Hydrogen gas production systems and related electrolysis cells
US-2022081782-A1 · Mar 17, 2022 · US
Electrochemical cell and hydrogen generation method
US-2022045348-A1 · Feb 10, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C25B1/044?
- CPC C25B1/044 is the Cooperative Patent Classification code for “producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO].”
- How many patents are filed under CPC C25B1/044 (producing mixed hydrogen and oxygen gas, e.g. Brown's gas [HHO])?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC C25B1/044 growing?
- Publication counts under this code: 6 in 2024 vs 5 in 2025 (latest complete years).