Sheet manufacturing apparatus and sheet manufacturing method
US-11753768-B2 · Sep 12, 2023 · US
Drying webs by hot air
Drying webs by hot air · 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 | D21F5/18 |
| Official title | Drying webs by hot air |
| Display label | Drying webs by hot air |
| Total patents | 67 |
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 |
| 2016 | 6 |
| 2017 | 6 |
| 2018 | 10 |
| 2019 | 6 |
| 2020 | 6 |
| 2021 | 6 |
| 2022 | 11 |
| 2023 | 7 |
| 2024 | 4 |
| 2025 | 3 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method of making a molded paper web
US-11732416-B2 · Aug 22, 2023 · US
Device and method for producing a pulp web
US-11702796-B2 · Jul 18, 2023 · US
Woven papermaking fabric including stabilized weave providing textured contacting surface
US-11680369-B2 · Jun 20, 2023 · US
Single ply tissue having improved cross-machine direction properties
US-11661706-B2 · May 30, 2023 · US
Control method for sheet manufacturing apparatus and sheet manufacturing apparatus
US-2023129241-A1 · Apr 27, 2023 · US
Device and Method for Producing a Pulp Web
US-2023064891-A1 · Mar 2, 2023 · US
Woven papermaking fabric having converging, diverging or merging topography
US-2022372703-A1 · Nov 24, 2022 · US
Sheet manufacturing apparatus and sheet manufacturing method
US-2022364306-A1 · Nov 17, 2022 · US
Woven papermaking fabric including stabilized weave providing textured contacting surface
US-2022290371-A1 · Sep 15, 2022 · US
Woven papermaking fabric having converging, diverging or merging topography
US-11441269-B2 · Sep 13, 2022 · US
Woven papermaking fabric including stabilized weave providing textured contacting surface
US-11377793-B2 · Jul 5, 2022 · US
Single ply tissue having improved cross-machine direction properties
US-2022186442-A1 · Jun 16, 2022 · US
Twill woven papermaking fabrics
US-11313079-B2 · Apr 26, 2022 · US
Single ply tissue having improved cross-machine direction properties
US-11299856-B2 · Apr 12, 2022 · US
Single ply tissue having improved cross-machine direction properties
US-2022064862-A1 · Mar 3, 2022 · US
Woven papermaking fabric having intersecting twill patterns
US-2022010490-A1 · Jan 13, 2022 · US
Woven papermaking fabric having discrete cross-machine driection protuberances
US-2022010491-A1 · Jan 13, 2022 · US
Method of making a molded paper web
US-2021395948-A1 · Dec 23, 2021 · US
Methods of making paper products using a molding roll
US-11136719-B2 · Oct 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F5/18?
- CPC D21F5/18 is the Cooperative Patent Classification code for “Drying webs by hot air.”
- How many patents are filed under CPC D21F5/18 (Drying webs by hot air)?
- Our database includes 67 publications tagged with this CPC code.
- Is patent activity under CPC D21F5/18 growing?
- Publication counts under this code: 4 in 2024 vs 3 in 2025 (latest complete years).