Curved core for variable pleat filter
US-12558645-B2 · Feb 24, 2026 · US
with pleats of different length
with pleats of different length · 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 | B01D2201/122 |
| Official title | with pleats of different length |
| Display label | with pleats of different length |
| Total patents | 33 |
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 | 3 |
| 2017 | 4 |
| 2018 | 5 |
| 2019 | 4 |
| 2020 | 4 |
| 2021 | 3 |
| 2022 | 2 |
| 2023 | 3 |
| 2025 | 2 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Star pleating with inside out flow having water drainage through the center
US-12403415-B2 · Sep 2, 2025 · US
Periodic radial symmetry for filter pleating
US-12194396-B2 · Jan 14, 2025 · US
Fixed rigid wall device for compressed pleat configuration filters
US-11752470-B2 · Sep 12, 2023 · US
Periodic radial symmetry for filter pleating
US-2023233961-A1 · Jul 27, 2023 · US
Periodic radial symmetry for filter pleating
US-11633679-B2 · Apr 25, 2023 · US
Curved core for variable pleat filter
US-2022323896-A1 · Oct 13, 2022 · US
Star pleating with inside out flow having water drainage through the center
US-2022193579-A1 · Jun 23, 2022 · US
Liquid Filter
US-2021283533-A1 · Sep 16, 2021 · US
Filter element
US-11033838-B2 · Jun 15, 2021 · US
Filter module
US-10981100-B2 · Apr 20, 2021 · US
Periodic radial symmetry for filter pleating
US-2020398194-A1 · Dec 24, 2020 · US
Filter module
US-2020346159-A1 · Nov 5, 2020 · US
Filter assembly and methods
US-10730000-B2 · Aug 4, 2020 · US
Filter element and filter assembly
US-10525396-B2 · Jan 7, 2020 · US
Fixed rigid wall device for compressed pleat configuration filters
US-2019224626-A1 · Jul 25, 2019 · US
Filter insert for a fluid, in particular transmission oil
US-10335718-B2 · Jul 2, 2019 · US
Filter element and filter arrangement
US-10272368-B2 · Apr 30, 2019 · US
Filter element having a filter bellows
US-10213723-B2 · Feb 26, 2019 · US
Self-supporting folded sheet material, filter elements, and methods
US-10112130-B2 · Oct 30, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2201/122?
- CPC B01D2201/122 is the Cooperative Patent Classification code for “with pleats of different length.”
- How many patents are filed under CPC B01D2201/122 (with pleats of different length)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC B01D2201/122 growing?
- Publication counts under this code: 3 in 2023 vs 2 in 2025 (latest complete years).