Channel chip
US-2025381572-A1 · Dec 18, 2025 · US
Edge filtering elements, i.e. using contiguous impervious surfaces
Edge filtering elements, i.e. using contiguous impervious surfaces · 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 | B01D29/44 |
| Official title | Edge filtering elements, i.e. using contiguous impervious surfaces |
| Display label | Edge filtering elements, i.e. using contiguous impervious surfaces |
| Total patents | 41 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 7 |
| 2019 | 7 |
| 2020 | 5 |
| 2021 | 5 |
| 2022 | 1 |
| 2023 | 4 |
| 2024 | 2 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods and devices for removing particles from fluids
US-2025325986-A1 · Oct 23, 2025 · US
Filter member and washing machine
US-12392077-B2 · Aug 19, 2025 · US
Microplastic detection sensor and microplastic detection system using the same
US-2024337575-A1 · Oct 10, 2024 · US
Precision fabrication of nanosieves
US-12042770-B2 · Jul 23, 2024 · US
Filter member and washing machine
US-2023407547-A1 · Dec 21, 2023 · US
Microscale and mesoscale condenser devices
US-11754476-B2 · Sep 12, 2023 · US
Microscale and mesoscale condenser devices
US-2023097357-A1 · Mar 30, 2023 · US
Microscale and mesoscale condenser devices
US-11566982-B2 · Jan 31, 2023 · US
Precision fabrication of nanosieves
US-2022055893-A1 · Feb 24, 2022 · US
Multistage deterministic lateral displacement device for particle separation
US-11185861-B2 · Nov 30, 2021 · US
Precision fabrication of nanosieves
US-11186480-B2 · Nov 30, 2021 · US
Filter subassembly for motor vehicle brake systems
US-11143216-B2 · Oct 12, 2021 · US
Microscale and mesoscale condenser devices
US-2021231543-A1 · Jul 29, 2021 · US
Double filter with pass-through and method for dynamically compensating for the inlet fluid contamination
US-11027292-B2 · Jun 8, 2021 · US
Screw press with filter plates
US-10780664-B2 · Sep 22, 2020 · US
Filter assembly for fuel injectors
US-10767614-B2 · Sep 8, 2020 · US
Precision fabrication of nanosieves
US-2020262698-A1 · Aug 20, 2020 · US
Filter assembly for fuel injectors
US-2020132030-A1 · Apr 30, 2020 · US
Channel device and method for concentrating fine particles
US-2020070169-A1 · Mar 5, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC B01D29/44?
- CPC B01D29/44 is the Cooperative Patent Classification code for “Edge filtering elements, i.e. using contiguous impervious surfaces.”
- How many patents are filed under CPC B01D29/44 (Edge filtering elements, i.e. using contiguous impervious surfaces)?
- Our database includes 41 publications tagged with this CPC code.
- Is patent activity under CPC B01D29/44 growing?
- Publication counts under this code: 2 in 2024 vs 3 in 2025 (latest complete years).