Method for the preparation of synthesis gas
US-12415724-B2 · Sep 16, 2025 · US
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Purification or separation processes
Purification or separation processes · 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 | C01B13/0229 |
| Official title | {Purification or separation processes} |
| Display label | Purification or separation processes |
| Total patents | 20 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 1 |
| 2020 | 2 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for the preparation of synthesis gas
US-2024425370-A1 · Dec 26, 2024 · US
Method for process-integrated oxygen supply of a hydrogen circulation engine comprising recirculation of a noble gas
US-11808238-B2 · Nov 7, 2023 · US
Solar driven aquaculture farm with oxygen generation for enhanced population health stability
US-2023175144-A1 · Jun 8, 2023 · US
Method for the preparation of synthesis gas
US-2023109188-A1 · Apr 6, 2023 · US
Method for process-integrated oxygen supply of a hydrogen circulation engine comprising recirculation of a noble gas
US-2022372936-A1 · Nov 24, 2022 · US
Method for the preparation of ammonia synthesis gas
US-11370658-B2 · Jun 28, 2022 · US
Method for the preparation of synthesis gas
US-11370660-B2 · Jun 28, 2022 · US
Method for the preparation of ammonia synthesis gas
US-2021198104-A1 · Jul 1, 2021 · US
Process for producing ammonia synthesis gas and a method for revamping a front-end of an ammonia plant
US-10954124-B2 · Mar 23, 2021 · US
Method for the preparation of synthesis gas
US-2020131034-A1 · Apr 30, 2020 · US
Method for the preparation of synthesis gas
US-2020109051-A1 · Apr 9, 2020 · US
Electricity generation
US-9923220-B2 · Mar 20, 2018 · US
Method and arrangement for generating oxygen
US-2017101314-A1 · Apr 13, 2017 · US
Process for revamping an ammonia plant with nitrogen-based washing of a purge stream
US-9446962-B2 · Sep 20, 2016 · US
Process for producing ammonia synthesis gas and a method for revamping a front-end of an ammonia plant
US-2016264411-A1 · Sep 15, 2016 · US
Integrated process for production of ozone and oxygen
US-9371228-B2 · Jun 21, 2016 · US
System and Process for Producing Ammonia Using an Ion Transport Membrane, Gasifier, and Ammonia Synthesis Unit
US-2015203359-A1 · Jul 23, 2015 · US
System for increasing the life of fuel injectors
US-9079199-B2 · Jul 14, 2015 · US
Integrated process for production of ozone and oxygen
US-2015068365-A1 · Mar 12, 2015 · US