Method and arrangement for feedback based control in chemical refining of wood
US-12508736-B2 · Dec 30, 2025 · US
by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00)
by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00) · 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 | D21B1/04 |
| Official title | by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00) |
| Display label | by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00) |
| Total patents | 39 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 1 |
| 2018 | 3 |
| 2019 | 8 |
| 2020 | 4 |
| 2021 | 6 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 7 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Inorganic fiber mat
US-2025333887-A1 · Oct 30, 2025 · US
Method of producing inorganic fiber mat and inorganic fiber mat
US-12428763-B2 · Sep 30, 2025 · US
Recycled sheet generation system, method for generating recycled sheet, and program
US-2025289243-A1 · Sep 18, 2025 · US
Used paper recycling apparatus
US-12398515-B2 · Aug 26, 2025 · US
Method of producing inorganic fiber mat and inorganic fiber mat
US-2025257506-A1 · Aug 14, 2025 · US
Inorganic fiber mat
US-2025034770-A1 · Jan 30, 2025 · US
Method of producing inorganic fiber mat and inorganic fiber mat
US-2024337053-A1 · Oct 10, 2024 · US
Fiber body forming apparatus and control method of fiber body forming apparatus
US-11732415-B2 · Aug 22, 2023 · US
Used paper recycling apparatus
US-2023250585-A1 · Aug 10, 2023 · US
Method for dissolving lignocellulosic biomass
US-11492737-B1 · Nov 8, 2022 · US
Fiber body forming apparatus and control method of fiber body forming apparatus
US-2022205181-A1 · Jun 30, 2022 · US
Method and arrangement for feedback based control in chemical refining of wood
US-2022097252-A1 · Mar 31, 2022 · US
Starch composite for binding fibers, fiber structure, and fiber structure-manufacturing apparatus
US-2021363700-A1 · Nov 25, 2021 · US
Process for the production of nano-fibrillar cellulose gels
US-2021261781-A1 · Aug 26, 2021 · US
Classifying device and fibrous feedstock recycling device
US-11072887-B2 · Jul 27, 2021 · US
Defibrated material manufacturing device, and sheet manufacturing apparatus
US-11028536-B2 · Jun 8, 2021 · US
Process for the production of nano-fibrillar cellulose gels
US-10975242-B2 · Apr 13, 2021 · US
Process for producing microfibrillated cellulose and a product thereof
US-10883226-B2 · Jan 5, 2021 · US
Tobacco-derived nanocellulose material
US-10774472-B2 · Sep 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21B1/04?
- CPC D21B1/04 is the Cooperative Patent Classification code for “by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00).”
- How many patents are filed under CPC D21B1/04 (by dividing raw materials into small particles, e.g. fibres (breaking-up or cutting wood or the like by dry methods B27L; mechanical separation of fibres from plant material D01B1/00; hackling or heckling machines D01B5/00))?
- Our database includes 39 publications tagged with this CPC code.
- Is patent activity under CPC D21B1/04 growing?
- Publication counts under this code: 1 in 2024 vs 7 in 2025 (latest complete years).