Process and reactor for catalytic oxidation of ammonia
US-12459819-B2 · Nov 4, 2025 · US
Chemistry & Metallurgy
Chemistry & Metallurgy · 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 | C01B21/28 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 67 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 7 |
| 2023 | 9 |
| 2024 | 10 |
| 2025 | 7 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Mono pressure system for producing nitric acid and method of operating thereof
US-2025091869-A1 · Mar 20, 2025 · US
Dual pressure system for producing nitric acid and method of operating thereof
US-2024367976-A1 · Nov 7, 2024 · US
Plant for the production of nitric acid, a related process and method of revamping
US-12129170-B2 · Oct 29, 2024 · US
Mono pressure system for producing nitric acid and method of operating thereof
US-2024343576-A1 · Oct 17, 2024 · US
Dual pressure system for producing nitric acid and method of operating thereof
US-2024343577-A1 · Oct 17, 2024 · US
Dual pressure system for producing nitric acid and method of operating thereof
US-2024336481-A1 · Oct 10, 2024 · US
Process for production of nitric acid provided with a secondary abatement treatment
US-2024246819-A1 · Jul 25, 2024 · US
SYSTEM FOR EVACUATING NOx GASES FROM A NITRIC ACID STORAGE TANK
US-2024228284-A1 · Jul 11, 2024 · US
Plant for the production of nitric acid, a related process and method of revamping
US-12006211-B2 · Jun 11, 2024 · US
High energy recovery nitric acid process using liquid oxygen containing fluid
US-11905172-B2 · Feb 20, 2024 · US
Ammonia burner for nitric acid production
US-2024002231-A1 · Jan 4, 2024 · US
Mono-pressure plant for the production of nitric acid and method for operating same
US-2023382734-A1 · Nov 30, 2023 · US
Method for oxidizing ammonia and system suitable therefor
US-11820653-B2 · Nov 21, 2023 · US
Reactor for the catalytic treatment of a gas stream
US-2023356163-A1 · Nov 9, 2023 · US
Nitric acid production process and plant with oxygen supply unit
US-11772971-B2 · Oct 3, 2023 · US
Dual pressure plant for the production of nitric acid and method for operating same
US-2023264957-A1 · Aug 24, 2023 · US
Nitric acid production process and plant with oxygen supply unit
US-2023257268-A1 · Aug 17, 2023 · US
Method for the catalytic oxidation of ammonia gas
US-11643327-B2 · May 9, 2023 · US
Delivery systems and methods for electric plasma synthesis of nitric oxide
US-11617850-B2 · Apr 4, 2023 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/28?
- CPC C01B21/28 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01B21/28 (Chemistry & Metallurgy)?
- Our database includes 67 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/28 growing?
- Publication counts under this code: 10 in 2024 vs 7 in 2025 (latest complete years).