Metal-metal bonded ammonia oxidation catalysts
US-12515207-B2 · Jan 6, 2026 · US
Preparation of nitrogen (by decomposition of ammonia C01B3/047)
Preparation of nitrogen (by decomposition of ammonia C01B3/047) · 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 | C01B21/02 |
| Official title | Preparation of nitrogen (by decomposition of ammonia C01B3/047) |
| Display label | Preparation of nitrogen (by decomposition of ammonia C01B3/047) |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2017 | 5 |
| 2018 | 5 |
| 2019 | 3 |
| 2020 | 7 |
| 2021 | 10 |
| 2022 | 7 |
| 2023 | 6 |
| 2024 | 3 |
| 2025 | 8 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Controlled reaction rates of thermochemical fluids using emulsions
US-2025388521-A1 · Dec 25, 2025 · US
Method for ammonia decomposition using carbon material supported metal catalyst
US-2025387779-A1 · Dec 25, 2025 · US
Turbomachine cooling and alternative fuel supply
US-2025382914-A1 · Dec 18, 2025 · US
Thermally driven nitrogen and ammonia production
US-2025346489-A1 · Nov 13, 2025 · US
Regenerated denitration catalyst and method for manufacturing the same, and denitration apparatus
US-12427509-B2 · Sep 30, 2025 · US
Generation of oxygen from activated aluminum and inorganic acids
US-2025296839-A1 · Sep 25, 2025 · US
Polygeneration scheme with zero carbon emission
US-2025283595-A1 · Sep 11, 2025 · US
Nitrogen oxide decomposition catalyst, catalytic reaction system including same, and air purification device
US-2025223162-A1 · Jul 10, 2025 · US
Multicomponent plasmonic photocatalysts consisting of a plasmonic antenna and a reactive catalytic surface: the antenna-reactor effect
US-12109558-B2 · Oct 8, 2024 · US
Reactor with sustainable power generation
US-2024300812-A1 · Sep 12, 2024 · US
Multicomponent plasmonic photocatalysts consisting of a plasmonic antenna and a reactive catalytic surface: the antenna-reactor effect
US-11958043-B2 · Apr 16, 2024 · US
Controlled reaction rates of thermochemical fluids using emulsions
US-2023374385-A1 · Nov 23, 2023 · US
Catalyst compositions for ammonia decomposition
US-11806700-B2 · Nov 7, 2023 · US
Cha-type zeolite and method for producing the same
US-2023271843-A1 · Aug 31, 2023 · US
Process for managing hydrogen sulfide in a refinery
US-11708267-B2 · Jul 25, 2023 · US
Catalyst compositions for ammonia decomposition
US-2023020279-A1 · Jan 19, 2023 · US
Metal-metal bonded ammonia oxidation catalysts
US-2023014161-A1 · Jan 19, 2023 · US
Conversion of ammonium nitrate into useful products
US-11518685-B2 · Dec 6, 2022 · US
Catalyst compositions for ammonia decomposition
US-11478784-B2 · Oct 25, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/02?
- CPC C01B21/02 is the Cooperative Patent Classification code for “Preparation of nitrogen (by decomposition of ammonia C01B3/047).”
- How many patents are filed under CPC C01B21/02 (Preparation of nitrogen (by decomposition of ammonia C01B3/047))?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/02 growing?
- Publication counts under this code: 3 in 2024 vs 8 in 2025 (latest complete years).