Device for dewatering or cleaning a fabric in a paper machine, and paper machine comprising such a device
US-2025198085-A1 · Jun 19, 2025 · US
Washing wire-cloths or felts
Washing wire-cloths or felts · Cooperative Patent Classification (CPC)
Textile and paper production, treatment, and products.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | D21F1/32 |
| Official title | Washing wire-cloths or felts |
| Display label | Washing wire-cloths or felts |
| Total patents | 28 |
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 |
| 2018 | 1 |
| 2019 | 6 |
| 2020 | 1 |
| 2021 | 5 |
| 2022 | 2 |
| 2023 | 5 |
| 2024 | 3 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
System and method for cleaning of belts and/or fabrics used on through air drying papermaking machines
US-12221748-B2 · Feb 11, 2025 · US
Wire treatment for dust control
US-2025027275-A1 · Jan 23, 2025 · US
Sheet manufacturing apparatus and cleaning device
US-2024410112-A1 · Dec 12, 2024 · US
Systems and methods for cleaning composite laminated imprinting fabrics
US-12163286-B2 · Dec 10, 2024 · US
Device and method for producing a fibrous web
US-12006631-B2 · Jun 11, 2024 · US
Crescent former for producing tissue paper
US-11834788-B2 · Dec 5, 2023 · US
Crescent former for producing tissue paper
US-2023212819-A1 · Jul 6, 2023 · US
Method for controlling slime in a pulp or paper making process
US-2023212822-A1 · Jul 6, 2023 · US
Systems and methods for cleaning composite laminated imprinting fabrics
US-2023122186-A1 · Apr 20, 2023 · US
Device and Method for Producing a Fibrous Web
US-2023030264-A1 · Feb 2, 2023 · US
System and method for cleaning of belts and/or fabrics used on through air drying papermaking machines
US-2022389654-A1 · Dec 8, 2022 · US
Machine for dewatering and drying a fibrous web
US-11286617-B2 · Mar 29, 2022 · US
Cleaning compositions and methods of cleaning equipment
US-11203733-B2 · Dec 21, 2021 · US
A drying section of a papermaking machine comprising one or more through air drying cylinders
US-2021310191-A1 · Oct 7, 2021 · US
Drying section of a papermaking machine comprising one or more through air drying cylinders
US-11136717-B1 · Oct 5, 2021 · US
Deposit detection in a paper making system via vibration analysis
US-11041271-B2 · Jun 22, 2021 · US
Conveyance device and fibrous material recycling device
US-11008705-B2 · May 18, 2021 · US
Process for cleaning a transport belt for manufacturing a paper web
US-10744545-B2 · Aug 18, 2020 · US
Cleaning compositions and methods of cleaning equipment
US-2019345418-A1 · Nov 14, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F1/32?
- CPC D21F1/32 is the Cooperative Patent Classification code for “Washing wire-cloths or felts.”
- How many patents are filed under CPC D21F1/32 (Washing wire-cloths or felts)?
- Our database includes 28 publications tagged with this CPC code.
- Is patent activity under CPC D21F1/32 growing?
- Publication counts under this code: 3 in 2024 vs 3 in 2025 (latest complete years).