Pressure equalizing system for air separation purification and control method
US-11612850-B2 · Mar 28, 2023 · US
for air
for air · Cooperative Patent Classification (CPC)
Engines, pumps, lighting, heating, and mechanical systems.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | F25J3/04 |
| Official title | for air |
| Display label | for air |
| Total patents | 25 |
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 | 4 |
| 2018 | 1 |
| 2019 | 4 |
| 2020 | 5 |
| 2021 | 2 |
| 2022 | 1 |
| 2023 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method and plant for generation of synthesis gas
US-11560308-B2 · Jan 24, 2023 · US
Plant and method for generation of synthesis gas
US-11485634-B2 · Nov 1, 2022 · US
Method and apparatus for the cryogenic separation of air
US-11193710-B2 · Dec 7, 2021 · US
Pressure equalizing system for air separation purification and control method
US-2021138387-A1 · May 13, 2021 · US
Annular divided wall column
US-10866026-B2 · Dec 15, 2020 · US
Distillation column system and plant for production of oxygen by cryogenic fractionation of air
US-10845118-B2 · Nov 24, 2020 · US
Process for increasing ethylene and propylene yield from a propylene plant
US-10808999-B2 · Oct 20, 2020 · US
Annular divided wall column for an air separation unit
US-10684071-B2 · Jun 16, 2020 · US
Plant and method for generation of synthesis gas
US-2020087143-A1 · Mar 19, 2020 · US
Method and device for the cryogenic decomposition of air
US-10443931-B2 · Oct 15, 2019 · US
Method and plant for generation of synthesis gas
US-2019308877-A1 · Oct 10, 2019 · US
Cryogenic adsorption process for xenon recovery
US-10295255-B2 · May 21, 2019 · US
Method and device for generating two purified partial air streams
US-10222120-B2 · Mar 5, 2019 · US
System and method for generation of oxygen by low-temperature air separation
US-9964353-B2 · May 8, 2018 · US
Process for increasing ethylene and propylene yield from a propylene plant
US-2017248364-A1 · Aug 31, 2017 · US
Low temperature air separation process for producing pressurized gaseous product
US-9733013-B2 · Aug 15, 2017 · US
Method and apparatus for separating air by cryogenic distillation
US-9562716-B2 · Feb 7, 2017 · US
Cryogenic air separation method and system
US-9546814-B2 · Jan 17, 2017 · US
Method and apparatus for the low-temperature fractionation of a fluid mixture
US-9527002-B2 · Dec 27, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC F25J3/04?
- CPC F25J3/04 is the Cooperative Patent Classification code for “for air.”
- How many patents are filed under CPC F25J3/04 (for air)?
- Our database includes 25 publications tagged with this CPC code.
- Is patent activity under CPC F25J3/04 growing?
- Publication counts under this code: 1 in 2022 vs 2 in 2023 (latest complete years).