Device for filtering and purifying greywater or other wastewater to generate a new, clean and safe water source by means of a biological filter
US-2025353763-A1 · Nov 20, 2025 · US
Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses
Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses · Cooperative Patent Classification (CPC)
Chemical and metallurgical processes, compounds, and materials.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | C02F3/201 |
| Official title | {Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses} |
| Display label | Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses |
| 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 | 3 |
| 2016 | 4 |
| 2017 | 3 |
| 2018 | 5 |
| 2019 | 1 |
| 2020 | 4 |
| 2021 | 3 |
| 2023 | 3 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Aeration grid within a wastewater treatment unit
US-2025171338-A1 · May 29, 2025 · US
Sheet laminate, method for manufacturing gas supply body, gas supply body, supply body unit, and wastewater treatment device
US-2025011206-A1 · Jan 9, 2025 · US
MABR media for supporting AOB and annamox bacteria and process for deammonification of wastewater
US-12122698-B2 · Oct 22, 2024 · US
Process for managing worms in membrane aerated biofilm
US-12103877-B2 · Oct 1, 2024 · US
Integrated device and treatment method for synchronous ecological treatment of domestic sewage and sludge
US-12012348-B2 · Jun 18, 2024 · US
Wastewater treatment with primary treatment and mbr or mabr-ifas reactor
US-2024091708-A1 · Mar 21, 2024 · US
Wastewater treatment with primary treatment and MBR or MABR-IFAS reactor
US-11850554-B2 · Dec 26, 2023 · US
Integrated Device and Treatment Method for Synchronous Ecological Treatment of Domestic Sewage and Sludge
US-2023322601-A1 · Oct 12, 2023 · US
Header-equipped air diffusion device, and membrane separation activated sludge device
US-11591244-B2 · Feb 28, 2023 · US
Mabr media for supporting aob and annamox bacteria and process for deammonification of wastewater
US-2021355011-A1 · Nov 18, 2021 · US
Submerged membrane unit diffuser case
US-11045769-B2 · Jun 29, 2021 · US
Sheet laminate, method for manufacturing gas supply body, gas supply body, supply body unit, and wastewater treatment device
US-2021114903-A1 · Apr 22, 2021 · US
Submerged membrane unit diffuser case
US-2020238218-A1 · Jul 30, 2020 · US
Method of upgrading the activated sludge process based on functional suspended carriers in the wastewater biological treatment process
US-2020156975-A1 · May 21, 2020 · US
Aerobic biological treatment method
US-2020148566-A1 · May 14, 2020 · US
Process for managing worms in membrane aerated biofilm
US-2020071213-A1 · Mar 5, 2020 · US
Wastewater treatment with primary treatment and mbr or mabr-ifas reactor
US-2019135667-A1 · May 9, 2019 · US
Wastewater treatment with primary treatment and MBR or MABR-IFAS reactor
US-10160679-B2 · Dec 25, 2018 · US
Diffusion pipe and method for cleaning diffusion pipe
US-10071924-B2 · Sep 11, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC C02F3/201?
- CPC C02F3/201 is the Cooperative Patent Classification code for “Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses.”
- How many patents are filed under CPC C02F3/201 (Perforated, resilient plastic diffusers, e.g. membranes, sheets, foils, tubes, hoses)?
- Our database includes 33 publications tagged with this CPC code.
- Is patent activity under CPC C02F3/201 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).