Method for reducing combustion temperature and thermal radiation within a lime kiln
US-12492818-B2 · Dec 9, 2025 · US
Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor · 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 | D21C11/0064 |
| Official title | {Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor} |
| Display label | Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor |
| Total patents | 32 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 2 |
| 2017 | 5 |
| 2018 | 4 |
| 2019 | 5 |
| 2020 | 3 |
| 2021 | 3 |
| 2022 | 3 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 2 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
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
Device and method for treating green liquor
US-2024117566-A1 · Apr 11, 2024 · US
Method and a system for adjusting PH of green liquor dregs
US-11655589-B2 · May 23, 2023 · US
A method for reducing combustion temperature and thermal radiation within a lime kiln
US-2023144517-A1 · May 11, 2023 · US
Vent stack temperature as a feedforward variable for smelt dissolving tank TTA control
US-11441265-B2 · Sep 13, 2022 · US
A method and a system for adjusting ph of green liquor dregs
US-2022275578-A1 · Sep 1, 2022 · 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
Process for controlling the sodium and sulfur balance in a pulp mill
US-2021130208-A1 · May 6, 2021 · US
Process for reducing ringing in lime kilns
US-10995991-B2 · May 4, 2021 · US
Vent stack temperature as a feedforward variable for smelt dissolving tank tta control
US-2021010200-A1 · Jan 14, 2021 · US
Method of recycling by-product generated in papermaking process
US-10774471-B2 · Sep 15, 2020 · US
System of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-10640924-B2 · May 5, 2020 · US
System of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-2020048832-A1 · Feb 13, 2020 · US
Method and system of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-10487449-B2 · Nov 26, 2019 · US
System and a method for producing aqueous sulphuric acid
US-10465339-B2 · Nov 5, 2019 · US
Method and a system for quality optimization of green liquor
US-10385513-B2 · Aug 20, 2019 · US
System and a method for producing aqueous sulphuric acid
US-2019177914-A1 · Jun 13, 2019 · US
Process and system for reducing ringing in lime kilns
US-2019093950-A1 · Mar 28, 2019 · US
Method and system of thermal recovery relating to the operation of a dissolver of a chemical recovery boiler
US-2018209095-A1 · Jul 26, 2018 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C11/0064?
- CPC D21C11/0064 is the Cooperative Patent Classification code for “Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor.”
- How many patents are filed under CPC D21C11/0064 (Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor)?
- Our database includes 32 publications tagged with this CPC code.
- Is patent activity under CPC D21C11/0064 growing?
- Publication counts under this code: 1 in 2024 vs 2 in 2025 (latest complete years).