A machine for producing a fibrous web
US-2025250739-A1 · Aug 7, 2025 · US
Wet presses
Wet presses · 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 | D21F3/02 |
| Official title | Wet presses |
| Display label | Wet presses |
| Total patents | 47 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is rapidly declining.
| Year | Patents |
|---|---|
| 2015 | 3 |
| 2016 | 7 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 6 |
| 2020 | 3 |
| 2021 | 8 |
| 2022 | 3 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Multi-ply paper products having a first stratified base sheet and a second stratified base sheet
US-12331463-B2 · Jun 17, 2025 · US
A method for producing a film comprising microfibrillated cellulose, and a film comprising microfibrillated cellulose
US-2024376670-A1 · Nov 14, 2024 · US
Fiber molding tool flow structures
US-2024287740-A1 · Aug 29, 2024 · US
Press Felt
US-2024175208-A1 · May 30, 2024 · US
Sheet producing method and sheet producing apparatus
US-11866885-B2 · Jan 9, 2024 · US
Multi-ply paper roducts and methods of making low lint multi-ply paper products
US-2023407566-A1 · Dec 21, 2023 · US
Methods of making multi-ply fibrous sheets
US-11781270-B2 · Oct 10, 2023 · US
Cleaning apparatus and fiber structure manufacturing apparatus
US-11725343-B2 · Aug 15, 2023 · US
A method for producing a film comprising nanocellulose, and a film comprising nanocellulose
US-2023193559-A1 · Jun 22, 2023 · US
Method for dewatering a web comprising microfibrillated cellulose and a film produced from the dewatered web
US-11619004-B2 · Apr 4, 2023 · US
Sheet producing method and sheet producing apparatus
US-2023062328-A1 · Mar 2, 2023 · US
Method and apparatus for producing a fiber web
US-11585047-B2 · Feb 21, 2023 · US
Method for operating a shoe press, shoe press, machine comprising a shoe press, and use of an ink in a lubricant for a shoe press
US-2022333305-A1 · Oct 20, 2022 · US
Cleaning apparatus and fiber structure manufacturing apparatus
US-2022316136-A1 · Oct 6, 2022 · US
Paper machine clothing and method
US-2022275580-A1 · Sep 1, 2022 · US
A method for dewatering a web comprising microfibrillated cellulose and a film produced from the dewatered web
US-2021324580-A1 · Oct 21, 2021 · US
Methods of making low lint paper products
US-2021277603-A1 · Sep 9, 2021 · US
Low lint multi-ply paper products having a first stratified base sheet and a second stratified base sheet
US-11035078-B2 · Jun 15, 2021 · US
Method and apparatus for producing a fibre web
US-2021156089-A1 · May 27, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F3/02?
- CPC D21F3/02 is the Cooperative Patent Classification code for “Wet presses.”
- How many patents are filed under CPC D21F3/02 (Wet presses)?
- Our database includes 47 publications tagged with this CPC code.
- Is patent activity under CPC D21F3/02 growing?
- Publication counts under this code: 4 in 2024 vs 2 in 2025 (latest complete years).