Method and device for waste paper pulping
US-2025171956-A1 · May 29, 2025 · US
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Kneading or mixing; Pulpers
Kneading or mixing; Pulpers · 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 | D21B1/34 |
| Official title | Kneading or mixing; Pulpers |
| Display label | Kneading or mixing; Pulpers |
| Total patents | 19 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 1 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 4 |
| 2022 | 1 |
| 2023 | 3 |
| 2024 | 2 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Methods for Liberating Trichome Fibers from Portions of a Host Plant
US-2025075428-A1 · Mar 6, 2025 · US
Lignin removal from lignocellulosic waste using rejected brine solution
US-2024368353-A1 · Nov 7, 2024 · US
An accept tank mixing arrangement
US-2024229352-A1 · Jul 11, 2024 · US
Buffer material and method of producing buffer material
US-2023174726-A1 · Jun 8, 2023 · US
Fiber transport apparatus and fiber transport method
US-11661702-B2 · May 30, 2023 · US
Mobile dispersion system and methods for the resuspension of partially-dried microfibrillated cellulose
US-2023092526-A1 · Mar 23, 2023 · US
Stirring apparatus
US-11291961-B2 · Apr 5, 2022 · US
Methods for Liberating Trichome Fibers from Portions of a Host Plant
US-2021348335-A1 · Nov 11, 2021 · US
Methods for liberating trichome fibers from portions of a host plant
US-11098451-B2 · Aug 24, 2021 · US
Method for preparing chitosan and derivative nanofiber thereof by mechanical means
US-2021238800-A1 · Aug 5, 2021 · US
Method and intermediate for the production of highly refined or microfibrillated cellulose
US-10900169-B2 · Jan 26, 2021 · US
Stirring apparatus
US-2020398236-A1 · Dec 24, 2020 · US
Fiber transport apparatus and fiber transport method
US-2020399830-A1 · Dec 24, 2020 · US
Methods for Liberating Trichome Fiberts from Portions of a Host Plant
US-2020359852-A1 · Nov 19, 2020 · US
Methods for liberating trichome fibers form portions of a host plant
US-10309057-B2 · Jun 4, 2019 · US
Methods for Liberating Trichome Fibers from Portions of a Host Plant
US-2017175332-A1 · Jun 22, 2017 · US
Method for recycling baled waste material
US-2016083902-A1 · Mar 24, 2016 · US
Method and intermediate for the production of highly refined or microfibrillated cellulose
US-2015218757-A1 · Aug 6, 2015 · US