NOx removal method
US-9809767-B2 · Nov 7, 2017 · US
Composition of the impurity
Composition of the impurity · 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 | C01B2203/0465 |
| Official title | Composition of the impurity |
| Display label | Composition of the impurity |
| Total patents | 221 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 28 |
| 2016 | 23 |
| 2017 | 24 |
| 2018 | 26 |
| 2019 | 18 |
| 2020 | 16 |
| 2021 | 14 |
| 2022 | 9 |
| 2023 | 19 |
| 2024 | 22 |
| 2025 | 19 |
| 2026 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-reaction process for forming a product gas from solid carbonaceous material
US-2017301938-A1 · Oct 19, 2017 · US
System for syngas clean-up
US-9783417-B2 · Oct 10, 2017 · US
Co shift catalyst, co shift reaction apparatus, and method for purifying gasified gas
US-2017267939-A1 · Sep 21, 2017 · US
System and method for treating hydrogen to be stored in a salt cavern and supplying therefrom
US-9718618-B2 · Aug 1, 2017 · US
Method for syngas clean-up of semi-volatile organic compounds with solids removal
US-2017152139-A1 · Jun 1, 2017 · US
Hydrogen purifier, hydrogen generation apparatus, and fuel cell system
US-9634344-B2 · Apr 25, 2017 · US
Method for syngas clean-up of semi-volatile organic compounds
US-9580315-B2 · Feb 28, 2017 · US
Purification method and purification apparatus for off-gas
US-2017007962-A1 · Jan 12, 2017 · US
Process for purifying synthesis gas by washing with aqueous solutions of amines
US-2016368767-A1 · Dec 22, 2016 · US
Hydrogen purification systems for pem fuel cells
US-2016340188-A1 · Nov 24, 2016 · US
System and method for syngas clean-up
US-9499404-B2 · Nov 22, 2016 · US
High and rapid hydrogen release from thermolysis of ammonia borane near PEM fuel cell operating temperature
US-9493349-B2 · Nov 15, 2016 · US
Process to prepare a mixture of hydrogen and carbon monoxide from a liquid hydrocarbon feedstock containing a certain amount of ash
US-9487400-B2 · Nov 8, 2016 · US
Low temperature sulfur tolerant tar and sulfur removal with concomitant synthesis gas conditioning
US-9486782-B2 · Nov 8, 2016 · US
Method of suppressing metal contamination of synthesis gas production apparatus
US-2016272895-A1 · Sep 22, 2016 · US
Method of purification of biomass syngas under negative pressure
US-9409775-B2 · Aug 9, 2016 · US
Steam-hydrocarbon reforming process
US-9409773-B2 · Aug 9, 2016 · US
Reactor vessels with pressure and heat transfer features for producing hydrogen-based fuels and structural elements, and associated systems and methods
US-9395081-B2 · Jul 19, 2016 · US
Catalyst for reforming tar-containing gas, method for preparing catalyst for reforming tar-containing gas, method for reforming tar-containing gas using catalyst for reforming tar containing gas, and method for regenerating catalyst for reforming tar-containing gas
US-9393551-B2 · Jul 19, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C01B2203/0465?
- CPC C01B2203/0465 is the Cooperative Patent Classification code for “Composition of the impurity.”
- How many patents are filed under CPC C01B2203/0465 (Composition of the impurity)?
- Our database includes 221 publications tagged with this CPC code.
- Is patent activity under CPC C01B2203/0465 growing?
- Publication counts under this code: 22 in 2024 vs 19 in 2025 (latest complete years).