Photocatalytic compositions and methods for their preparation and use
US-9821296-B2 · Nov 21, 2017 · US
Rare earth metals
Rare earth metals · 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 | B01D2255/206 |
| Official title | Rare earth metals |
| Display label | Rare earth metals |
| Total patents | 183 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 31 |
| 2016 | 24 |
| 2017 | 15 |
| 2018 | 22 |
| 2019 | 16 |
| 2020 | 13 |
| 2021 | 12 |
| 2022 | 16 |
| 2023 | 13 |
| 2024 | 13 |
| 2025 | 8 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Ceramic materials for gas separation and oxygen storage
US-9764985-B2 · Sep 19, 2017 · US
Catalyst for the oxidation of CO and HC at low temperatures
US-9757712-B2 · Sep 12, 2017 · US
Emissions treatment system with ammonia-generating and scr catalysts
US-2017241313-A1 · Aug 24, 2017 · US
Ammonia oxidation catalyst for the production of nitric acid based on yttrium-gadolinium ortho cobaltates
US-9675963-B2 · Jun 13, 2017 · US
Optimization of washcoat adhesion of zero-PGM catalyst on metallic substrates
US-9517449-B2 · Dec 13, 2016 · US
Catalytically effective composition for a multilayer catalyst for exhaust gas after-treatment of combustion exhaust gases
US-9511360-B2 · Dec 6, 2016 · US
Emissions reduction system
US-2016341091-A1 · Nov 24, 2016 · US
Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems
US-2016339389-A1 · Nov 24, 2016 · US
Catalytic member for purifying exhaust gases, and washcoat
US-2016332146-A1 · Nov 17, 2016 · US
Systems and methods for using copper-manganese spinel as active phase for diesel oxidation applications
US-9486783-B2 · Nov 8, 2016 · US
NOx trap
US-9486791-B2 · Nov 8, 2016 · US
Scr catalyst
US-2016288094-A1 · Oct 6, 2016 · US
Oxidation catalyst and method for producing the oxidation catalyst
US-9457317-B2 · Oct 4, 2016 · US
Composition based on oxides of zirconium, cerium, niobium and tin, preparation processes and use in catalysis
US-2016279608-A1 · Sep 29, 2016 · US
Diesel oxidation catalyst and use thereof in diesel and advanced combustion diesel engine systems
US-9440192-B2 · Sep 13, 2016 · US
Catalyst for the oxidation of co and hc at low temperatures
US-2016236180-A1 · Aug 18, 2016 · US
Zeolite-based SCR catalysts and their use in diesel engine emission treatment
US-9403156-B2 · Aug 2, 2016 · US
Exhaust gas purification system and method for purifying exhaust gas
US-9394820-B2 · Jul 19, 2016 · US
Exhaust gas purification apparatus
US-9388757-B2 · Jul 12, 2016 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2255/206?
- CPC B01D2255/206 is the Cooperative Patent Classification code for “Rare earth metals.”
- How many patents are filed under CPC B01D2255/206 (Rare earth metals)?
- Our database includes 183 publications tagged with this CPC code.
- Is patent activity under CPC B01D2255/206 growing?
- Publication counts under this code: 13 in 2024 vs 8 in 2025 (latest complete years).