Ammonia and urea production in reverse flow reactors
US-12565422-B2 · Mar 3, 2026 · 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 | C01B3/46 |
| Official title | — |
| Display label | Chemistry & Metallurgy (mapped technology topic) |
| Total patents | 21 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2017 | 2 |
| 2018 | 1 |
| 2020 | 5 |
| 2021 | 1 |
| 2022 | 4 |
| 2023 | 3 |
| 2025 | 3 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for production of hydrogen with transport from chemical looping using mixture of partial oxidation oxygen carriers and combustion oxygen carriers
US-2025250166-A1 · Aug 7, 2025 · US
Process for production of hydrogen with transport from chemical looping using mixture of partial oxidation oxygen carriers and combustion oxygen carriers
US-12319575-B2 · Jun 3, 2025 · US
Palladium Catalyst Systems For Reforming In Cyclic Flow Reactors
US-2025025866-A1 · Jan 23, 2025 · US
Reverse flow reactor regeneration using high heat capacity fluids
US-11851328-B2 · Dec 26, 2023 · US
Ammonia and urea production in reverse flow reactors
US-2023357003-A1 · Nov 9, 2023 · US
Reverse flow reactors with selective flue gas management
US-11559780-B2 · Jan 24, 2023 · US
Hydrogen production with integrated CO2 capture
US-11511992-B2 · Nov 29, 2022 · US
Oxycombustion with CO2 capture in reverse flow reactors
US-11465903-B2 · Oct 11, 2022 · US
Process for production of hydrogen with transport from chemical looping using mixture of partial oxidation oxygen carriers and combustion oxygen carriers
US-2022219976-A1 · Jul 14, 2022 · US
Method for operating a blast furnace
US-2022145410-A1 · May 12, 2022 · US
Oxycombustion with co2 capture in reverse flow reactors
US-2021047181-A1 · Feb 18, 2021 · US
Reverse flow reactors with selective flue gas management
US-2020338522-A1 · Oct 29, 2020 · US
Hydrogen production with integrated co2 capture
US-2020331751-A1 · Oct 22, 2020 · US
Reverse flow reactor regeneration using high heat capacity fluids
US-2020317515-A1 · Oct 8, 2020 · US
Reduction of regenerator clogging
US-10712092-B2 · Jul 14, 2020 · US
Reforming catalyst
US-10577243-B2 · Mar 3, 2020 · US
Glass furnace with improved production rate
US-2018346365-A1 · Dec 6, 2018 · US
Compact pressure swing reformer
US-9687803-B2 · Jun 27, 2017 · US
Reforming catalyst
US-2017137285-A1 · May 18, 2017 · US
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Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B3/46?
- CPC C01B3/46 is the Cooperative Patent Classification code for “Chemistry & Metallurgy.”
- How many patents are filed under CPC C01B3/46 (Chemistry & Metallurgy)?
- Our database includes 21 publications tagged with this CPC code.
- Is patent activity under CPC C01B3/46 growing?
- Publication counts under this code: 3 in 2023 vs 3 in 2025 (latest complete years).