Exhaust gas purification filter
US-11850540-B2 · Dec 26, 2023 · US
of the plugs
of the plugs · 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 | B01D46/244 |
| Official title | {of the plugs} |
| Display label | of the plugs |
| Total patents | 70 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 11 |
| 2016 | 6 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 8 |
| 2021 | 11 |
| 2022 | 8 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 3 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cement mixtures for plugging multicellular filter bodies and methods of making the same
US-2023159398-A1 · May 25, 2023 · US
Honeycomb filter
US-2022401870-A1 · Dec 22, 2022 · US
Pillar-shaped honeycomb structure and method for manufacturing same
US-11511268-B2 · Nov 29, 2022 · US
Porous honeycomb structure and method for manufacturing same
US-2022315496-A1 · Oct 6, 2022 · US
Honeycomb filter
US-2022305422-A1 · Sep 29, 2022 · US
Porous honeycomb structure and method for manufacturing same
US-2022267220-A1 · Aug 25, 2022 · US
Honeycomb structure and exhaust gas purifying device
US-11369952-B2 · Jun 28, 2022 · US
Honeycomb filter
US-11260384-B2 · Mar 1, 2022 · US
Exhaust gas purification filter
US-2022040624-A1 · Feb 10, 2022 · US
Pillar-shaped honeycomb structure and method for manufacturing same
US-2021299646-A1 · Sep 30, 2021 · US
Honeycomb structure and exhaust gas purifying device
US-2021291157-A1 · Sep 23, 2021 · US
Honeycomb filter
US-2021268422-A1 · Sep 2, 2021 · US
Roller drum plugging of honeycomb bodies
US-2021180489-A1 · Jun 17, 2021 · US
Methods of plugging a honeycomb body
US-2021146574-A1 · May 20, 2021 · US
Honeycomb filter
US-10994236-B2 · May 4, 2021 · US
Honeycomb filter
US-10974187-B2 · Apr 13, 2021 · US
Honeycomb filter plugging and apparatus for honeycomb filter plugging
US-10940420-B2 · Mar 9, 2021 · US
Honeycomb filter
US-10940419-B2 · Mar 9, 2021 · US
Particulate filter for an internal combustion engine and method for producing such a particulate filter
US-10918987-B2 · Feb 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/244?
- CPC B01D46/244 is the Cooperative Patent Classification code for “of the plugs.”
- How many patents are filed under CPC B01D46/244 (of the plugs)?
- Our database includes 70 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/244 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).