Apparatus and process for providing a production gas output from an air separation system
US-2025262593-A1 · Aug 21, 2025 · US
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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 | C01B21/045 |
| Official title | {by adsorption in solids} |
| Display label | by adsorption in solids |
| Total patents | 22 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 3 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 4 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Facility for recovering co2 from a feed gas flow
US-2025121315-A1 · Apr 17, 2025 · US
Process for the preparation of green ammonia synthesis gas
US-2024351896-A1 · Oct 24, 2024 · US
Hybrid nitrogen gas generation system
US-11717785-B2 · Aug 8, 2023 · US
Hybrid nitrogen gas generation system
US-2023119185-A1 · Apr 20, 2023 · US
Nitrogen conservation in polymerization processes
US-11623176-B2 · Apr 11, 2023 · US
Nitrogen conservation in polymerization processes
US-10792609-B2 · Oct 6, 2020 · US
Nitrogen Conservation in Polymerization Processes
US-2020306684-A1 · Oct 1, 2020 · 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
Fast cycle gas phase simulated moving bed apparatus and process
US-10500538-B2 · Dec 10, 2019 · US
Nitrogen Conservation in Polymerization Processes
US-2019336906-A1 · Nov 7, 2019 · US
Refrigeration unit for container
US-10345014-B2 · Jul 9, 2019 · US
Fast cycle gas phase simulated moving bed apparatus and process
US-2018229177-A1 · Aug 16, 2018 · US
Refrigeration unit for container
US-2016245555-A1 · Aug 25, 2016 · US
Nitrogen-enriched gas manufacturing method, gas separation method and nitrogen-enriched gas manufacturing apparatus
US-9403118-B2 · Aug 2, 2016 · US
Method for producing nitrogen gas, method for separating gas and device for producing nitrogen gas
US-9359203-B2 · Jun 7, 2016 · US
Gas separation device and gas separation method
US-9216374-B2 · Dec 22, 2015 · US
Gas separation device
US-9144767-B2 · Sep 29, 2015 · US
Gas separation device
US-2015151238-A1 · Jun 4, 2015 · US