Apparatus and method
US-2026054245-A1 · Feb 26, 2026 · US
Preparation of nitrogen oxides using a plasma or an electric discharge
Preparation of nitrogen oxides using a plasma or an electric discharge · 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 | C01B21/203 |
| Official title | {Preparation of nitrogen oxides using a plasma or an electric discharge} |
| Display label | Preparation of nitrogen oxides using a plasma or an electric discharge |
| Total patents | 27 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 2 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 2 |
| 2023 | 1 |
| 2024 | 5 |
| 2025 | 1 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ammonium nitrate production
US-2025381545-A1 · Dec 18, 2025 · US
Ammonia generator using plasma
US-2024254635-A1 · Aug 1, 2024 · US
Plasma reactor for plasma-based gas conversion comprising an effusion nozzle
US-2024216887-A1 · Jul 4, 2024 · US
Inspiratory synthesis of nitric oxide
US-12011544-B2 · Jun 18, 2024 · US
Nitric oxide administration device
US-11951261-B2 · Apr 9, 2024 · US
Plasma assisted electrocatalytic conversion
US-2024052502-A1 · Feb 15, 2024 · US
Dinitrogen pentoxide generating device and method for generating dinitrogen pentoxide
US-2023312345-A1 · Oct 5, 2023 · US
Nitric oxide administration device
US-2021379320-A1 · Dec 9, 2021 · US
Systems and methods for a cooled nitric oxide generator
US-11007503-B2 · May 18, 2021 · US
Synthesis of nitric oxide gas for inhalation
US-2020345966-A1 · Nov 5, 2020 · US
Inspiratory synthesis of nitric oxide
US-2020345965-A1 · Nov 5, 2020 · US
Synthesis of nitric oxide gas for inhalation
US-10773047-B2 · Sep 15, 2020 · US
Inspiratory synthesis of nitric oxide
US-10646682-B2 · May 12, 2020 · US
Inspiratory synthesis of nitric oxide
US-2020030567-A1 · Jan 30, 2020 · US
Liquid treatment apparatus
US-10435314-B2 · Oct 8, 2019 · US
Inspiratory synthesis of nitric oxide
US-10434276-B2 · Oct 8, 2019 · US
Systems and methods for a cooled nitric oxide generator
US-2019299188-A1 · Oct 3, 2019 · US
Inspiratory synthesis of nitric oxide
US-10293133-B2 · May 21, 2019 · US
Synthesis of nitric oxide gas for inhalation
US-10279139-B2 · May 7, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B21/203?
- CPC C01B21/203 is the Cooperative Patent Classification code for “Preparation of nitrogen oxides using a plasma or an electric discharge.”
- How many patents are filed under CPC C01B21/203 (Preparation of nitrogen oxides using a plasma or an electric discharge)?
- Our database includes 27 publications tagged with this CPC code.
- Is patent activity under CPC C01B21/203 growing?
- Publication counts under this code: 5 in 2024 vs 1 in 2025 (latest complete years).