Process to purify helium from methane with integrated nitrogen rejection using membrane technology
US-2025276275-A1 · Sep 4, 2025 · US
by adsorption in solids
by adsorption in solids · 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 | C01B23/0052 |
| Official title | {by adsorption in solids} |
| Display label | by adsorption in solids |
| Total patents | 36 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 3 |
| 2019 | 5 |
| 2020 | 2 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 2 |
| 2024 | 6 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Apparatus and process for providing a production gas output from an air separation system
US-2025262593-A1 · Aug 21, 2025 · US
Method of recycling helium from waste gas in semiconductor process
US-2025122079-A1 · Apr 17, 2025 · US
Argon column for air separation unit and air separation unit
US-2025085050-A1 · Mar 13, 2025 · US
Pressure swing adsorption gas separation apparatus
US-2025041786-A1 · Feb 6, 2025 · US
Process for producing very high purity helium or hydrogen
US-2024228285-A9 · Jul 11, 2024 · US
Process and apparatus to recover helium
US-2024217821-A1 · Jul 4, 2024 · US
Method and arrangement for recovering a helium product from natural gas by membrane unit
US-11986770-B2 · May 21, 2024 · US
Process for producing very high purity helium or hydrogen
US-2024132353-A1 · Apr 25, 2024 · US
Gas separation method and gas separation device
US-11925896-B2 · Mar 12, 2024 · US
Method and apparatus for adsorptive distillation for cryogenic argon/oxygen separation
US-11885562-B2 · Jan 30, 2024 · US
Gas separation method and gas separation device
US-2023356141-A1 · Nov 9, 2023 · US
Separation and purification coupled process with high helium yield and diversified products
US-11697092-B2 · Jul 11, 2023 · US
Method and arrangement for recovering helium
US-2022314163-A1 · Oct 6, 2022 · US
Separation and purification coupled process with high helium yield and diversified products
US-2021402345-A1 · Dec 30, 2021 · US
Method and arrangement for recovering a helium product from natural gas by membrane unit
US-2021291110-A1 · Sep 23, 2021 · US
Method and apparatus for adsorptive distillation for cryogenic argon/oxygen separation
US-2021278131-A1 · Sep 9, 2021 · US
System and method for xenon recovery
US-10892132-B2 · Jan 12, 2021 · US
Multi-bed rapid cycle kinetic PSA
US-10744450-B2 · Aug 18, 2020 · US
Multi-Bed Rapid Cycle Kinetic PSA
US-2020054987-A1 · Feb 20, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B23/0052?
- CPC C01B23/0052 is the Cooperative Patent Classification code for “by adsorption in solids.”
- How many patents are filed under CPC C01B23/0052 (by adsorption in solids)?
- Our database includes 36 publications tagged with this CPC code.
- Is patent activity under CPC C01B23/0052 growing?
- Publication counts under this code: 6 in 2024 vs 5 in 2025 (latest complete years).