Filter bags comprising a porous membrane
US-10994237-B2 · May 4, 2021 · US
Cleaning filters
Cleaning filters · 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 | B01D46/04 |
| Official title | Cleaning filters |
| Display label | Cleaning filters |
| Total patents | 115 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 6 |
| 2016 | 4 |
| 2017 | 9 |
| 2018 | 14 |
| 2019 | 11 |
| 2020 | 14 |
| 2021 | 11 |
| 2022 | 16 |
| 2023 | 9 |
| 2024 | 13 |
| 2025 | 7 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Separating apparatus
US-10953359-B2 · Mar 23, 2021 · US
Air cleaning module
US-10871295-B2 · Dec 22, 2020 · US
Separating apparatus
US-10842332-B2 · Nov 24, 2020 · US
A relief valve and a hose device for dust collectors, a dust collector and a method for operating a dust collector
US-2020305667-A1 · Oct 1, 2020 · US
Filter bags comprising a porous membrane
US-2020269180-A1 · Aug 27, 2020 · US
Filter bags comprising a porous membrane
US-2020269181-A1 · Aug 27, 2020 · US
Vacuum cleaner
US-2020178744-A1 · Jun 11, 2020 · US
Valve, Use of Such Valve, Separator Comprising Such Valve and Method of Operating a Separator
US-2020147538-A1 · May 14, 2020 · US
Filter cleaning
US-2020121146-A1 · Apr 23, 2020 · US
Low particulate matter emission fabric filter
US-2020078720-A1 · Mar 12, 2020 · US
Vacuum cleaner
US-10561290-B2 · Feb 18, 2020 · US
Method of compacting ash deposited in a particulate filter by providing a low-temperature melting salt to said filter
US-2020032684-A1 · Jan 30, 2020 · US
Bag filters having controlled air permeability and dust collectors using the same
US-10543444-B2 · Jan 28, 2020 · US
Method and system for filter bag unit assembly and filter bag unit
US-10532308-B2 · Jan 14, 2020 · US
Dust collector and dust removal method for same
US-2020009490-A1 · Jan 9, 2020 · US
Bag filter filtration and dust collecting apparatus for preventing dust accumulation
US-10464004-B2 · Nov 5, 2019 · US
Filter cleaning mechanism
US-2019313871-A1 · Oct 17, 2019 · US
Fixed rigid wall device for compressed pleat configuration filters
US-2019224626-A1 · Jul 25, 2019 · US
Dust container for a vacuum cleaner
US-2019208973-A1 · Jul 11, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D46/04?
- CPC B01D46/04 is the Cooperative Patent Classification code for “Cleaning filters.”
- How many patents are filed under CPC B01D46/04 (Cleaning filters)?
- Our database includes 115 publications tagged with this CPC code.
- Is patent activity under CPC B01D46/04 growing?
- Publication counts under this code: 13 in 2024 vs 7 in 2025 (latest complete years).