Plant and process for ammonia production with cryogenic purification, and related method of revamping
US-10514203-B2 · Dec 24, 2019 · US
by diffusion
by diffusion · 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 | C01B3/501 |
| Official title | by diffusion |
| Display label | by diffusion |
| Total patents | 231 |
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 | 16 |
| 2016 | 12 |
| 2017 | 12 |
| 2018 | 17 |
| 2019 | 8 |
| 2020 | 8 |
| 2021 | 10 |
| 2022 | 26 |
| 2023 | 27 |
| 2024 | 34 |
| 2025 | 50 |
| 2026 | 11 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Process and apparatus for the production of CO and CO2
US-10302357-B2 · May 28, 2019 · US
Methanol synthesis from synthesis gases with hydrogen deficiency
US-2019077735-A1 · Mar 14, 2019 · US
Method and apparatus for improving the efficiency of reforming process for producing syngas and methanol while reducing the CO2 in a gaseous stream
US-10160704-B2 · Dec 25, 2018 · US
Use of membrane for oxidative-dehydrogenation process
US-10160698-B2 · Dec 25, 2018 · US
Process for separation of hydrogen and oxygen
US-2018346329-A1 · Dec 6, 2018 · US
Hydrogen purification device and hydrogen purification system using hydrogen purification device
US-10105641-B2 · Oct 23, 2018 · US
Process and apparatus for recovering hydrogen from hydroprocessed stripper off gas
US-2018280863-A1 · Oct 4, 2018 · US
Plant and process for ammonia production with cryogenic purification, and related method of revamping
US-2018266758-A1 · Sep 20, 2018 · US
Method and apparatus for improving the efficiency of reforming process for producing syngas and methanol while reducing the co2 in a gaseous stream
US-2018258019-A1 · Sep 13, 2018 · US
Process and plant for separating a gas mixture
US-10066870-B2 · Sep 4, 2018 · US
Aromatization reactors with hydrogen removal and related reactor systems
US-10052602-B2 · Aug 21, 2018 · US
Hydrogen gas production device and hydrogen gas production method
US-2018207578-A1 · Jul 26, 2018 · US
Maximizing production of hydrogen from waste materials by active removal of hydrogen
US-10030254-B2 · Jul 24, 2018 · US
Hydrogen-generating fuel cell cartridges
US-9985306-B2 · May 29, 2018 · US
Method and apparatus for co-production of methanol and hydrogen
US-9969666-B1 · May 15, 2018 · US
Use of membrane for oxidative-dehydrogenation process
US-2018118638-A1 · May 3, 2018 · US
Method and system for production of hydrogen rich gas mixtures
US-9932229-B2 · Apr 3, 2018 · US
Electricity generation
US-9923220-B2 · Mar 20, 2018 · US
Sweep membrane separator and fuel processing systems
US-9917320-B2 · Mar 13, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B3/501?
- CPC C01B3/501 is the Cooperative Patent Classification code for “by diffusion.”
- How many patents are filed under CPC C01B3/501 (by diffusion)?
- Our database includes 231 publications tagged with this CPC code.
- Is patent activity under CPC C01B3/501 growing?
- Publication counts under this code: 34 in 2024 vs 50 in 2025 (latest complete years).