Paper precoat process
US-12247356-B2 · Mar 11, 2025 · US
De-inking
De-inking · 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 | D21C5/025 |
| Official title | {De-inking} |
| Display label | De-inking |
| Total patents | 55 |
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 | 4 |
| 2016 | 6 |
| 2017 | 8 |
| 2018 | 10 |
| 2019 | 2 |
| 2020 | 8 |
| 2021 | 4 |
| 2022 | 5 |
| 2023 | 5 |
| 2024 | 2 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Supported toothed plates in a disperser
US-2024011221-A9 · Jan 11, 2024 · US
Supported toothed plates in a disperser with buttress extending from the substrate and between a first face of a tooth
US-11859344-B2 · Jan 2, 2024 · US
Supported toothed plates in a disperser including bridge between teeth with cross-sectional shape
US-11851816-B2 · Dec 26, 2023 · US
Apparatus for recycling of lignocellulosic fibres from fibreboards
US-2023313454-A1 · Oct 5, 2023 · US
Paper Precoat Process
US-2023095967-A1 · Mar 30, 2023 · US
Methods for deinking UV prints
US-11560672-B2 · Jan 24, 2023 · US
Method for removing foreign materials from the surface of an article
US-2023002575-A1 · Jan 5, 2023 · US
High consistency re-pulping method, apparatus and absorbent products incorporating recycled fiber
US-11486089-B2 · Nov 1, 2022 · US
Recycled deinked sheet articles
US-11414791-B2 · Aug 16, 2022 · US
Fiber assembly-forming method and fiber assembly-forming apparatus
US-11274395-B2 · Mar 15, 2022 · US
Supported toothed plates in a disperser
US-2022034032-A1 · Feb 3, 2022 · US
Supported toothed plates in a disperser
US-2022034031-A1 · Feb 3, 2022 · US
Supported toothed plates in a disperser
US-11208763-B2 · Dec 28, 2021 · US
Methods for deinking uv prints
US-2021025113-A1 · Jan 28, 2021 · US
High Consistency Re-Pulping Method, Apparatus and Absorbent Products Incorporating Recycled Fiber
US-2021017704-A1 · Jan 21, 2021 · US
High consistency re-pulping method, apparatus and absorbent products incorporating recycled fiber
US-10895038-B2 · Jan 19, 2021 · US
Fiber assembly-forming method and fiber assembly-forming apparatus
US-2020385924-A1 · Dec 10, 2020 · US
Method for dewatering of sludge from a pulp, paper or board making process
US-10858782-B2 · Dec 8, 2020 · US
Cellulase gene
US-10774318-B2 · Sep 15, 2020 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C5/025?
- CPC D21C5/025 is the Cooperative Patent Classification code for “De-inking.”
- How many patents are filed under CPC D21C5/025 (De-inking)?
- Our database includes 55 publications tagged with this CPC code.
- Is patent activity under CPC D21C5/025 growing?
- Publication counts under this code: 2 in 2024 vs 1 in 2025 (latest complete years).