Process to purify helium from methane with integrated nitrogen rejection using membrane technology
US-2025276275-A1 · Sep 4, 2025 · US
by making use of membranes
by making use of membranes · 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 | C01B23/0042 |
| Official title | {by making use of membranes} |
| Display label | by making use of membranes |
| Total patents | 32 |
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 | 4 |
| 2017 | 3 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 4 |
| 2023 | 1 |
| 2024 | 3 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process for purification of helium to very high purity
US-2024409409-A1 · Dec 12, 2024 · US
Method and arrangement for recovering a helium product from natural gas by membrane unit
US-11986770-B2 · May 21, 2024 · US
Method and system for purification of helium using cryogenic, membrane, and adsorption techniques
US-11952270-B2 · Apr 9, 2024 · 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
Recovery of noncondensable gas components from a gaseous mixture
US-2022205717-A1 · Jun 30, 2022 · US
Helium recovery from gaseous streams
US-11325066-B2 · May 10, 2022 · US
Method and system for purification of helium using cryogenic, membrane, and adsorption techniques
US-2022106190-A1 · Apr 7, 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
Helium extraction from natural gas
US-10962283-B2 · Mar 30, 2021 · US
Helium recovery from gaseous streams
US-2021031139-A1 · Feb 4, 2021 · US
Separation process and apparatus for light noble gas
US-10843121-B2 · Nov 24, 2020 · US
Helium recovery from gaseous streams
US-10765995-B2 · Sep 8, 2020 · US
Helium Extraction from Natural Gas
US-2020088466-A1 · Mar 19, 2020 · US
Separation Process and Apparatus for Light Noble Gas
US-2019201835-A1 · Jul 4, 2019 · US
Helium recovery from natural gas
US-2019201838-A1 · Jul 4, 2019 · US
Helium purity adjustment in a membrane system
US-2019184332-A1 · Jun 20, 2019 · US
Process and plant for obtaining pure helium
US-2019176083-A1 · Jun 13, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B23/0042?
- CPC C01B23/0042 is the Cooperative Patent Classification code for “by making use of membranes.”
- How many patents are filed under CPC C01B23/0042 (by making use of membranes)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC C01B23/0042 growing?
- Publication counts under this code: 3 in 2024 vs 1 in 2025 (latest complete years).