System and method for sorbent-based gas capture using heat pipes
US-2025196050-A1 · Jun 19, 2025 · US
Carbon oxides
Carbon oxides · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D2257/50 |
| Official title | Carbon oxides |
| Display label | Carbon oxides |
| Total patents | 64 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 5 |
| 2017 | 9 |
| 2018 | 6 |
| 2019 | 3 |
| 2020 | 4 |
| 2021 | 4 |
| 2022 | 8 |
| 2023 | 7 |
| 2024 | 7 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for producing dimethyl ether (dme) from synthesis gas
US-2025011268-A1 · Jan 9, 2025 · US
Recovery method and production method for cyclic carbonate
US-2024367104-A1 · Nov 7, 2024 · US
Method for purifying air pollution in indoor space to level close to zero
US-2024328651-A1 · Oct 3, 2024 · US
Crosslinked polymer membranes and methods of their production
US-2024299878-A1 · Sep 12, 2024 · US
Crosslinked polymer membranes and methods of their production
US-12030015-B2 · Jul 9, 2024 · US
Method for producing high purity hydrogen
US-11945721-B2 · Apr 2, 2024 · US
Environmental protection device control apparatus, production plan optimization system, method and computer-readable medium
US-2024036560-A1 · Feb 1, 2024 · US
Gas exchange device
US-11879665-B2 · Jan 23, 2024 · US
CMS membrane, method for the production thereof and use thereof
US-11786870-B2 · Oct 17, 2023 · US
Method for producing high purity hydrogen
US-2023249971-A1 · Aug 10, 2023 · US
Method of reducing carbon dioxide and air pollutants
US-11642624-B2 · May 9, 2023 · US
Polymaleic acid assisted metal nanoparticle synthesis for three-way catalysis application
US-2023129600-A1 · Apr 27, 2023 · US
Exhaust Gas Purification Catalyst
US-2023078076-A1 · Mar 16, 2023 · US
Method for upgrading bio-based material and upgraded material
US-2023020748-A1 · Jan 19, 2023 · US
Exhaust gas treatment by thermal diffusion
US-11555434-B1 · Jan 17, 2023 · US
Collection and separation systems and methods of use thereof and isotope analysis systems and methods of use thereof
US-2022339580-A1 · Oct 27, 2022 · US
Process for improving carbon conversion efficiency
US-2022298649-A1 · Sep 22, 2022 · US
Method of Reducing Carbon Dioxide and Air Pollutants
US-2022241723-A1 · Aug 4, 2022 · US
Gas exchange device
US-2022221172-A1 · Jul 14, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2257/50?
- CPC B01D2257/50 is the Cooperative Patent Classification code for “Carbon oxides.”
- How many patents are filed under CPC B01D2257/50 (Carbon oxides)?
- Our database includes 64 publications tagged with this CPC code.
- Is patent activity under CPC B01D2257/50 growing?
- Publication counts under this code: 7 in 2024 vs 5 in 2025 (latest complete years).