Method of replacing sodium losses in a pulp mill, a method of producing bleached cellulosic pulp, and a system
US-12331460-B2 · Jun 17, 2025 · US
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with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively
with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively · 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 | D21C9/142 |
| Official title | {with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively} |
| Display label | with ClO2/Cl2 in a multistage process involving ClO2/Cl2 exclusively |
| Total patents | 10 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is stable.
| Year | Patents |
|---|---|
| 2016 | 1 |
| 2017 | 1 |
| 2018 | 2 |
| 2019 | 1 |
| 2020 | 1 |
| 2021 | 1 |
| 2022 | 1 |
| 2023 | 1 |
| 2025 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for pitch control during bleaching
US-2023212821-A1 · Jul 6, 2023 · US
A method of replacing sodium losses in a pulp mill, a method of producing bleached cellulosic pulp, and a system
US-2022106737-A1 · Apr 7, 2022 · US
Method for production of cellulose nanocrystals from miscanthus giganteus and composites therefrom
US-2021139613-A1 · May 13, 2021 · US
Method for production of cellulose nanocrystals from Miscanthus giganteus and composites therefrom
US-10793647-B2 · Oct 6, 2020 · US
Measurement apparatus and method
US-10400392-B2 · Sep 3, 2019 · US
Method for Production of Cellulose Nanocrystals from Miscanthus Giganteus and Composites Therefrom
US-2018265598-A1 · Sep 20, 2018 · US
Method for production of cellulose nanocrystals from Miscathus giganteus and composites therefrom
US-10000578-B2 · Jun 19, 2018 · US
Measurement apparatus and method
US-2017096774-A1 · Apr 6, 2017 · US
Method for Production of Cellulose Nanocrystals from Miscanthus Giganteus and Composites Therefrom
US-2016319043-A1 · Nov 3, 2016 · US