Ion-exchange membranes, filters, and methods
US-2021394169-A1 · Dec 23, 2021 · US
Special form, dimension of the openings, pores of the filtering elements
Special form, dimension of the openings, pores of the filtering elements · 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 | B01D2201/184 |
| Official title | Special form, dimension of the openings, pores of the filtering elements |
| Display label | Special form, dimension of the openings, pores of the filtering elements |
| Total patents | 117 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 3 |
| 2017 | 5 |
| 2018 | 10 |
| 2019 | 16 |
| 2020 | 10 |
| 2021 | 15 |
| 2022 | 15 |
| 2023 | 12 |
| 2024 | 19 |
| 2025 | 10 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Three-dimensional shaping apparatus and nozzle unit
US-11167485-B2 · Nov 9, 2021 · US
Filtration device for chromatographic instruments
US-11161065-B2 · Nov 2, 2021 · US
Disposable Insert For Strainer Basket
US-2021283534-A1 · Sep 16, 2021 · US
Filter screen
US-2021268448-A1 · Sep 2, 2021 · US
Method and apparatuses for screening
US-2021260503-A1 · Aug 26, 2021 · US
Rotary screening of a conditioned oil sand slurry, and an improved rotary screening apparatus
US-11098253-B1 · Aug 24, 2021 · US
Water-treating ceramic filter unit
US-2021252439-A1 · Aug 19, 2021 · US
Filtering device for removing impurities in a mixture of biological diatomite
US-2021205741-A1 · Jul 8, 2021 · US
Filtration filter and filtration filter device
US-11052337-B2 · Jul 6, 2021 · US
Disc filter pre-screen dual media disc filter
US-2021129059-A1 · May 6, 2021 · US
Interstage screen basket
US-D915484-S · Apr 6, 2021 · US
Filtration filter
US-2021077925-A1 · Mar 18, 2021 · US
Oil filter systems
US-10941682-B2 · Mar 9, 2021 · US
Disc filter pre-screen dual media disc filter
US-10888807-B2 · Jan 12, 2021 · US
Filtration device
US-2020353383-A1 · Nov 12, 2020 · US
Filtration filter and filtration device
US-2020346144-A1 · Nov 5, 2020 · US
Suction strainer
US-10792597-B2 · Oct 6, 2020 · US
Strainer for turbine engine oil
US-10688421-B2 · Jun 23, 2020 · US
Sleeve for a filter assembly
US-2020182207-A1 · Jun 11, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D2201/184?
- CPC B01D2201/184 is the Cooperative Patent Classification code for “Special form, dimension of the openings, pores of the filtering elements.”
- How many patents are filed under CPC B01D2201/184 (Special form, dimension of the openings, pores of the filtering elements)?
- Our database includes 117 publications tagged with this CPC code.
- Is patent activity under CPC B01D2201/184 growing?
- Publication counts under this code: 19 in 2024 vs 10 in 2025 (latest complete years).