Membranes for gas separation
US-12023633-B2 · Jul 2, 2024 · US
Carbon monoxide
Carbon monoxide · 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 | B01D2256/20 |
| Official title | Carbon monoxide |
| Display label | Carbon monoxide |
| Total patents | 306 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 13 |
| 2016 | 26 |
| 2017 | 23 |
| 2018 | 28 |
| 2019 | 37 |
| 2020 | 28 |
| 2021 | 34 |
| 2022 | 32 |
| 2023 | 35 |
| 2024 | 24 |
| 2025 | 19 |
| 2026 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Gas purification apparatus and method
US-11931687-B2 · Mar 19, 2024 · US
System for syngas clean-up of semi-volatile organic compounds
US-9845240-B2 · Dec 19, 2017 · US
Method for producing acid gas separation composite membrane, and acid gas separation membrane module
US-9839882-B2 · Dec 12, 2017 · US
Transfer line
US-2017312701-A1 · Nov 2, 2017 · US
System for syngas clean-up
US-9783417-B2 · Oct 10, 2017 · US
Absorbent solution containing a mixture of 1,2-bis-(2-dimethylaminoethoxy)-ethane and of 2-[2-(2-dimethylaminoethoxy)-ethoxy]-ethanol, and method of removing acid compounds from a gaseous effluent
US-2017197176-A1 · Jul 13, 2017 · US
Separation and storage of fluids using ITQ-55
US-9688542-B2 · Jun 27, 2017 · US
Method for oxygen removal from hydrogen using adsorbent
US-2017174514-A1 · Jun 22, 2017 · US
Sour syngas treatment apparatuses and processes for treating sour syngas comprising sulfur components and carbon dioxide
US-9682343-B2 · Jun 20, 2017 · US
Method for processing fischer-tropsch off-gas
US-9682342-B2 · Jun 20, 2017 · US
Method for syngas clean-up of semi-volatile organic compounds with solids removal
US-2017152139-A1 · Jun 1, 2017 · US
Method for syngas clean-up of semi-volatile organic compounds with carbonyl sulfide removal
US-2017152140-A1 · Jun 1, 2017 · US
Sterically Hindered Amines and Associated Methods
US-2017144102-A1 · May 25, 2017 · US
Staged complementary psa system for low energy fractionation of mixed fluid
US-2017136402-A1 · May 18, 2017 · US
Direct reduced iron manufacturing system
US-9638468-B2 · May 2, 2017 · US
Separation, storage, and catalytic conversion of fluids using ITQ-55
US-9617164-B2 · Apr 11, 2017 · US
Method for syngas clean-up of semi-volatile organic compounds
US-9580315-B2 · Feb 28, 2017 · US
High temperature dry desulfurization system and method using multi regeneration rector
US-2017044014-A1 · Feb 16, 2017 · US
Direct reduced iron manufacturing system
US-9557113-B2 · Jan 31, 2017 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2256/20?
- CPC B01D2256/20 is the Cooperative Patent Classification code for “Carbon monoxide.”
- How many patents are filed under CPC B01D2256/20 (Carbon monoxide)?
- Our database includes 306 publications tagged with this CPC code.
- Is patent activity under CPC B01D2256/20 growing?
- Publication counts under this code: 24 in 2024 vs 19 in 2025 (latest complete years).