High strength and low stiffness hesperaloe tissue
US-2023407574-A1 · Dec 21, 2023 · US
paper or board consisting on two or more layers
paper or board consisting on two or more layers · 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 | D21F11/04 |
| Official title | paper or board consisting on two or more layers |
| Display label | paper or board consisting on two or more layers |
| Total patents | 104 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2018 | 6 |
| 2019 | 8 |
| 2020 | 11 |
| 2021 | 13 |
| 2022 | 11 |
| 2023 | 20 |
| 2024 | 14 |
| 2025 | 13 |
| 2026 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
High strength and low stiffness hesperaloe tissue
US-11773539-B2 · Oct 3, 2023 · US
Absorbent Product with Improved Capillary Pressure and Saturation Capacity
US-2023250586-A1 · Aug 10, 2023 · US
Multilayer film comprising highly refined cellulose fibers
US-2023151552-A1 · May 18, 2023 · US
High strength and low stiffness hesperaloe tissue
US-2023122650-A1 · Apr 20, 2023 · US
Through-air apparatus to reduce infiltration of ambient air
US-2022380979-A1 · Dec 1, 2022 · US
Method of forming a three-layer board web and a forming section of forming a three-layer board web
US-11512431-B2 · Nov 29, 2022 · US
Method to produce a paperboard, a paperboard and a corrugated board
US-2022372706-A1 · Nov 24, 2022 · US
A tube package
US-2022290377-A1 · Sep 15, 2022 · US
Paper products having increased bending stiffness and cross-direction strength and methods for making the same
US-11441268-B2 · Sep 13, 2022 · US
Method to produce a paperboard, a paperboard and a corrugated board
US-11441272-B2 · Sep 13, 2022 · US
Laminate and method for producing laminate
US-11426763-B2 · Aug 30, 2022 · US
Method for manufacturing a multi-layered paperboard, multi-layered paperboard and composition for use in multi-layered paperboard manufacturing
US-11365517-B2 · Jun 21, 2022 · US
Method for sizing a multi-ply fiber web and a forming section for a multi-ply fiber web
US-11299857-B2 · Apr 12, 2022 · US
Method for producing single-layer or multi-layer paper
US-11293143-B2 · Apr 5, 2022 · US
Method for increasing the strength properties of a paper or board product
US-11214927-B2 · Jan 4, 2022 · US
Process for producing nonwoven
US-11136700-B2 · Oct 5, 2021 · US
Cellulose based film structure and method for producing the same
US-2021301464-A1 · Sep 30, 2021 · US
Layered tissue comprising non-wood fibers
US-2021292973-A1 · Sep 23, 2021 · US
Durable tissue product
US-2021238806-A1 · Aug 5, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21F11/04?
- CPC D21F11/04 is the Cooperative Patent Classification code for “paper or board consisting on two or more layers.”
- How many patents are filed under CPC D21F11/04 (paper or board consisting on two or more layers)?
- Our database includes 104 publications tagged with this CPC code.
- Is patent activity under CPC D21F11/04 growing?
- Publication counts under this code: 14 in 2024 vs 13 in 2025 (latest complete years).