Method for manufacturing gasoline particulate filter
US-12544739-B2 · Feb 10, 2026 · US
Additives or dopants
Additives or dopants · 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 | B01D2255/707 |
| Official title | Additives or dopants |
| Display label | Additives or dopants |
| Total patents | 57 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 4 |
| 2018 | 11 |
| 2019 | 12 |
| 2020 | 7 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 4 |
| 2024 | 4 |
| 2025 | 2 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Carbon-coated nickel oxide nanocomposite material, preparation method therefor and use thereof
US-12528077-B2 · Jan 20, 2026 · US
Catalytic gasoline particulate filter
US-2025334066-A1 · Oct 30, 2025 · US
Exhaust gas purification catalyst
US-12350653-B2 · Jul 8, 2025 · US
Photocatalyst for air purification, and ceramic catalyst filter and air purification device including the same
US-12064536-B2 · Aug 20, 2024 · US
Gas treatment method and materials
US-12036530-B2 · Jul 16, 2024 · US
Catalytic article comprising vanadium-based catalyst and molecular sieve-based catalyst
US-2024167410-A1 · May 23, 2024 · US
Exhaust gas purification catalyst
US-2024024816-A1 · Jan 25, 2024 · US
Method for manufacturing gasoline particulate filter
US-2023381746-A1 · Nov 30, 2023 · US
Gas treatment method and materials
US-2023182117-A1 · Jun 15, 2023 · US
Gas treatment method and materials
US-11577224-B2 · Feb 14, 2023 · US
Exhaust gas purification catalyst
US-2023001391-A1 · Jan 5, 2023 · US
Carbon-coated Nickel Oxide Nanocomposite Material, Preparation Method Therefor and Use Thereof
US-2022401929-A1 · Dec 22, 2022 · US
Photocatalyst for air purification, and ceramic catalyst filter and air purification device including the same
US-2022280677-A1 · Sep 8, 2022 · US
Nitrogen oxide reduction catalyst regenerable at low temperature
US-11203011-B2 · Dec 21, 2021 · US
Borate-containing membranes for gas separation
US-11000810-B2 · May 11, 2021 · US
Catalyst for metal mercury oxidation reactions and nitrogen oxide reduction reactions, and exhaust gas purification method
US-10898881-B2 · Jan 26, 2021 · US
SCR-Active Material
US-2020406191-A1 · Dec 31, 2020 · US
4-way hybrid binary catalysts, methods and uses thereof
US-10835866-B2 · Nov 17, 2020 · US
SCR-active material
US-10799831-B2 · Oct 13, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2255/707?
- CPC B01D2255/707 is the Cooperative Patent Classification code for “Additives or dopants.”
- How many patents are filed under CPC B01D2255/707 (Additives or dopants)?
- Our database includes 57 publications tagged with this CPC code.
- Is patent activity under CPC B01D2255/707 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).