Yankee drying cylinder and a tissue paper making machine
US-12421662-B2 · Sep 23, 2025 · US
Construction of the cylinders
Construction of the cylinders · 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 | D21F5/021 |
| Official title | {Construction of the cylinders} |
| Display label | Construction of the cylinders |
| Total patents | 39 |
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 | 1 |
| 2016 | 8 |
| 2017 | 1 |
| 2018 | 6 |
| 2019 | 7 |
| 2020 | 2 |
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 3 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Cylinder for Drying a Fibrous Web
US-2025290695-A1 · Sep 18, 2025 · US
A yankee drying cylinder and a tissue paper making machine
US-2024011222-A1 · Jan 11, 2024 · US
Methods of making fabric-creped absorbent cellulosic sheets
US-11788232-B2 · Oct 17, 2023 · US
Methods of making fabric-creped absorbent cellulosic sheets
US-11753772-B2 · Sep 12, 2023 · US
Method of applying a wear-resistant coating on a yankee drying cylinder
US-2023065043-A1 · Mar 2, 2023 · US
Method for the surface treatment of a steel Yankee
US-11414718-B2 · Aug 16, 2022 · US
Yankee drying hood arrangement, a Yankee drying cylinder fitted with a Yankee drying hood arrangement and a method of drying a fibrous web
US-11268240-B2 · Mar 8, 2022 · US
A yankee drying hood arrangement, a yankee drying cylinder fitted with a yankee drying hood arrangement and a method of drying a fibrous web
US-2022042244-A1 · Feb 10, 2022 · US
Method of making a steel Yankee cylinder
US-11103947-B2 · Aug 31, 2021 · US
Methods of making fabric-creped absorbent cellulosic sheets
US-2021238805-A1 · Aug 5, 2021 · US
Methods of making fabric-creped absorbent cellulosic sheets
US-2021230805-A1 · Jul 29, 2021 · US
Soft absorbent sheets, structuring fabrics for making soft absorbent sheets, and methods of making soft absorbent sheets
US-11021840-B2 · Jun 1, 2021 · US
Method and apparatus for removing water from a capillary cylinder in a papermaking process
US-10895040-B2 · Jan 19, 2021 · US
Method for the Surface Treatment of a Steel Yankee
US-2020199697-A1 · Jun 25, 2020 · US
Drying roller and a method for manufacturing the same
US-10676866-B2 · Jun 9, 2020 · US
Soft absorbent sheets, structuring fabrics for making soft absorbent sheets, and methods of making soft absorbent sheets
US-2019257035-A1 · Aug 22, 2019 · US
Soft absorbent sheets, structuring fabrics for making soft absorbent sheets, and methods of making soft absorbent sheets
US-10329716-B2 · Jun 25, 2019 · US
Method For Coating A Drying Cylinder
US-2019186076-A1 · Jun 20, 2019 · US
Method and Apparatus for Removing Water from A Capillary Cylinder in A Papermaking Process
US-2019169796-A1 · Jun 6, 2019 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F5/021?
- CPC D21F5/021 is the Cooperative Patent Classification code for “Construction of the cylinders.”
- How many patents are filed under CPC D21F5/021 (Construction of the cylinders)?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC D21F5/021 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).