Gas purification apparatus and method
US-11931687-B2 · Mar 19, 2024 · US
Amines
Amines · 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 | B01D2252/204 |
| Official title | Amines |
| Display label | Amines |
| Total patents | 812 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 72 |
| 2016 | 75 |
| 2017 | 76 |
| 2018 | 84 |
| 2019 | 79 |
| 2020 | 69 |
| 2021 | 63 |
| 2022 | 61 |
| 2023 | 63 |
| 2024 | 60 |
| 2025 | 92 |
| 2026 | 18 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for capturing a molecule of interest and associated capture system
US-2024050890-A1 · Feb 15, 2024 · US
Gas prepurification process
US-9221008-B2 · Dec 29, 2015 · US
Emissions Reduction for CO2 Capture
US-2015367283-A1 · Dec 24, 2015 · US
System and method for recovering gas containing co2 and h2s
US-2015361364-A1 · Dec 17, 2015 · US
Process for floating liquified natural gas pretreatment
US-9211494-B2 · Dec 15, 2015 · US
Variable capacity multiple-leg packed separation column
US-2015343370-A1 · Dec 3, 2015 · US
Process for recovering carbon dioxide from construction exhaust gas
US-2015343369-A1 · Dec 3, 2015 · US
Regenerable solvent mixtures for acid-gas separation
US-2015328581-A1 · Nov 19, 2015 · US
Separation of CO2 and H2S using supported amines
US-9186626-B2 · Nov 17, 2015 · US
Co2 recovery system
US-2015321136-A1 · Nov 12, 2015 · US
Efficient use of adsorbents for indoor air scrubbing
US-2015321135-A1 · Nov 12, 2015 · US
Aqueous solutions of amine functionalized ionic compounds for carbon capture processes
US-9180403-B2 · Nov 10, 2015 · US
Unit for establishing contact between a gas and a liquid for a floating platform
US-9168494-B2 · Oct 27, 2015 · US
Reducing and Removing Foulant From Regenerated Amine Mixtures
US-2015298026-A1 · Oct 22, 2015 · US
Carbon dioxide recovery apparatus and carbon dioxide recovery method
US-2015298054-A1 · Oct 22, 2015 · US
Bipolar electrodialyzer and purification method for amine fluid using same
US-2015290576-A1 · Oct 15, 2015 · US
Carbon dioxide capturing system and method of operating same
US-9157353-B2 · Oct 13, 2015 · US
Removal of metals from co2 capture solvents
US-2015258497-A1 · Sep 17, 2015 · US
Systems and processes for removing volatile degradation products produced in gas purification
US-9133407-B2 · Sep 15, 2015 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2252/204?
- CPC B01D2252/204 is the Cooperative Patent Classification code for “Amines.”
- How many patents are filed under CPC B01D2252/204 (Amines)?
- Our database includes 812 publications tagged with this CPC code.
- Is patent activity under CPC B01D2252/204 growing?
- Publication counts under this code: 60 in 2024 vs 92 in 2025 (latest complete years).