Composition of matter in stock preparation zone of wet laid process
US-11519132-B2 · Dec 6, 2022 · US
Wood pulp
Wood pulp · 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 | D04H1/26 |
| Official title | Wood pulp |
| Display label | Wood pulp |
| Total patents | 157 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 9 |
| 2019 | 5 |
| 2020 | 17 |
| 2021 | 13 |
| 2022 | 32 |
| 2023 | 28 |
| 2024 | 20 |
| 2025 | 18 |
| 2026 | 4 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Composition of matter in a post-refiner blend zone
US-11492757-B2 · Nov 8, 2022 · US
Compacted Fibrous Structure Articles and Methods for Making Same
US-2022325454-A1 · Oct 13, 2022 · US
Fibrous structure-containing articles that exhibit consumer relevant properties
US-2022274373-A1 · Sep 1, 2022 · US
Fibrous structure-containing articles that exhibit consumer relevant properties
US-11235551-B2 · Feb 1, 2022 · US
Nonwoven web with highly detailed and functionally advantageous bond pattern
US-2021363676-A1 · Nov 25, 2021 · US
Fiber body manufacturing method and fiber body manufacturing apparatus
US-2021301463-A1 · Sep 30, 2021 · US
Hygiene product
US-11083817-B2 · Aug 10, 2021 · US
Fibrous nonwoven web
US-2021222335-A1 · Jul 22, 2021 · US
Fiber assembly-forming method, fiber assembly-forming apparatus, and sheet
US-2021164167-A1 · Jun 3, 2021 · US
Web forming device and sheet manufacturing apparatus
US-11015273-B2 · May 25, 2021 · US
Composite nonwoven sheet material
US-2021114341-A1 · Apr 22, 2021 · US
Web forming device and sheet manufacturing apparatus
US-2021115606-A1 · Apr 22, 2021 · US
Biopolymer-Containing Nonwoven Fabric
US-2021102320-A1 · Apr 8, 2021 · US
Fiber processing device and fiber body manufacturing apparatus
US-2021095400-A1 · Apr 1, 2021 · US
Fiber structure and fiber structure block
US-2021087727-A1 · Mar 25, 2021 · US
Porous carbon sheet and precursor fiber sheet thereof
US-10957916-B2 · Mar 23, 2021 · US
Layered fibrous structures comprising cross-linked fibers
US-2021054572-A1 · Feb 25, 2021 · US
Absorbent and absorbent article
US-2020405547-A1 · Dec 31, 2020 · US
Cleansing substrate with synchronized printed and expanded texture
US-2020385923-A1 · Dec 10, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D04H1/26?
- CPC D04H1/26 is the Cooperative Patent Classification code for “Wood pulp.”
- How many patents are filed under CPC D04H1/26 (Wood pulp)?
- Our database includes 157 publications tagged with this CPC code.
- Is patent activity under CPC D04H1/26 growing?
- Publication counts under this code: 20 in 2024 vs 18 in 2025 (latest complete years).