Process and plant for removing thiols from synthesis gas
US-2022177793-A1 · Jun 9, 2022 · US
Nitrogen compounds
Nitrogen compounds · Cooperative Patent Classification (CPC)
Separating, mixing, shaping, printing, and transporting materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | B01D53/54 |
| Official title | Nitrogen compounds |
| Display label | Nitrogen compounds |
| Total patents | 84 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 10 |
| 2017 | 8 |
| 2018 | 10 |
| 2019 | 10 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 7 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 10 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Plasma abatement of compounds containing heavy atoms
US-11185815-B2 · Nov 30, 2021 · US
Systems and methods for remanufacturing selective catalytic reduction systems
US-11148129-B2 · Oct 19, 2021 · US
Systems and methods for remanufacturing selective catalytic reduction systems
US-2021170388-A1 · Jun 10, 2021 · US
Cluster supported catalyst and method for producing same
US-11014073-B2 · May 25, 2021 · US
Carbon dioxide capture system and method of operating carbon dioxide capture system
US-2021031136-A1 · Feb 4, 2021 · US
Multi-stage membrane for N2 rejection
US-10780392-B2 · Sep 22, 2020 · US
Method and system for upgrading biogas
US-10760024-B2 · Sep 1, 2020 · US
Quench column aftercooler
US-10668400-B2 · Jun 2, 2020 · US
Removal of urea and ammonia from exhaust gases
US-10640428-B2 · May 5, 2020 · US
Method and system for upgrading biogas
US-2020017787-A1 · Jan 16, 2020 · US
Emissions reduction for CO2 capture
US-10486104-B2 · Nov 26, 2019 · US
Process for recovery and purification of nitrous oxide
US-10464813-B2 · Nov 5, 2019 · US
Multi-stage membrane for n2 rejection
US-2019321780-A1 · Oct 24, 2019 · US
Plasma abatement of compounds containing heavy atoms
US-10449486-B2 · Oct 22, 2019 · US
Quench column aftercooler
US-2019299122-A1 · Oct 3, 2019 · US
Carbon dioxide capture system and method of operating carbon dioxide capture system
US-2019232215-A1 · Aug 1, 2019 · US
Adsorbed natural gas storage facility
US-10302254-B2 · May 28, 2019 · US
Sulfonic acid-containing polymeric materials as amine sorbents
US-10220370-B2 · Mar 5, 2019 · US
Deodorizer
US-2019030199-A1 · Jan 31, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D53/54?
- CPC B01D53/54 is the Cooperative Patent Classification code for “Nitrogen compounds.”
- How many patents are filed under CPC B01D53/54 (Nitrogen compounds)?
- Our database includes 84 publications tagged with this CPC code.
- Is patent activity under CPC B01D53/54 growing?
- Publication counts under this code: 3 in 2024 vs 10 in 2025 (latest complete years).