Plant and process for ammonia production with cryogenic purification, and related method of revamping
US-10514203-B2 · Dec 24, 2019 · US
At least two purification steps in series
At least two purification steps in series · 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 | C01B2203/146 |
| Official title | At least two purification steps in series |
| Display label | At least two purification steps in series |
| Total patents | 236 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly growing.
| Year | Patents |
|---|---|
| 2015 | 14 |
| 2016 | 12 |
| 2017 | 7 |
| 2018 | 18 |
| 2019 | 22 |
| 2020 | 15 |
| 2021 | 9 |
| 2022 | 28 |
| 2023 | 43 |
| 2024 | 32 |
| 2025 | 31 |
| 2026 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Fuel cell reactor and a process for direct conversion of a hydrocarbon-containing gas to a higher hydrocarbons product
US-2019375695-A1 · Dec 12, 2019 · US
Method of producing liquid fuel from carbonaceous feedstock through gasification and recycling of downstream products
US-2019359902-A1 · Nov 28, 2019 · US
Integrated coal liquefaction, petroleum or biomass facility with decreased carbon dioxide production and higher carbon and thermal efficiencies
US-10487274-B2 · Nov 26, 2019 · US
Plant for production of hydrogen and method for operating this plant
US-10486968-B2 · Nov 26, 2019 · US
Process and apparatus for treating a sour synthesis gas
US-10399852-B2 · Sep 3, 2019 · US
System for producing organic substance and method for producing organic substance
US-2019256874-A1 · Aug 22, 2019 · US
Process for producing a synthesis gas
US-2019152776-A1 · May 23, 2019 · US
Methanol synthesis from synthesis gases with hydrogen deficiency
US-2019077735-A1 · Mar 14, 2019 · US
H2 psa with modification of the feed gas flow
US-2018369739-A1 · Dec 27, 2018 · US
Process and apparatus for treating a sour synthesis gas
US-2018327263-A1 · Nov 15, 2018 · US
Method and apparatus for separating a synthesis gas
US-2018320959-A1 · Nov 8, 2018 · US
Hydrogen recovery method
US-2018318749-A1 · Nov 8, 2018 · US
Process for purifying synthesis gas by washing with aqueous solutions of amines
US-10118824-B2 · Nov 6, 2018 · US
Process and apparatus for recovering light hydrocarbons by sponge absorption
US-2018280827-A1 · Oct 4, 2018 · US
Process for producing ammonia synthesis gas
US-10087074-B2 · Oct 2, 2018 · US
Plant and process for ammonia production with cryogenic purification, and related method of revamping
US-2018266758-A1 · Sep 20, 2018 · US
Process and plant for separating a gas mixture
US-10066870-B2 · Sep 4, 2018 · US
Method and system for obtaining a hydrogen rich gas
US-2018237297-A1 · Aug 23, 2018 · US
Systems and methods for power production with integrated production of hydrogen
US-2018128172-A1 · May 10, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B2203/146?
- CPC C01B2203/146 is the Cooperative Patent Classification code for “At least two purification steps in series.”
- How many patents are filed under CPC C01B2203/146 (At least two purification steps in series)?
- Our database includes 236 publications tagged with this CPC code.
- Is patent activity under CPC C01B2203/146 growing?
- Publication counts under this code: 32 in 2024 vs 31 in 2025 (latest complete years).