Method for controlling a chemical recovery boiler and a chemical recovery boiler
US-2023057366-A1 · Feb 23, 2023 · US
Combustion of pulp liquors
Combustion of pulp liquors · 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 | D21C11/12 |
| Official title | Combustion of pulp liquors |
| Display label | Combustion of pulp liquors |
| Total patents | 80 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 5 |
| 2016 | 4 |
| 2017 | 9 |
| 2018 | 9 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 8 |
| 2022 | 11 |
| 2023 | 6 |
| 2024 | 9 |
| 2025 | 5 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Automatic monitoring of smelt flow exiting a recovery boiler
US-2022396918-A1 · Dec 15, 2022 · US
Disruptor assembly adjustment system and method
US-2022380978-A1 · Dec 1, 2022 · US
Combustion of streams derived from hot water extraction of wood material
US-11512428-B2 · Nov 29, 2022 · US
Disruptor assembly adjustment system and method
US-11441266-B2 · Sep 13, 2022 · US
A method and a system for adjusting ph of green liquor dregs
US-2022275578-A1 · Sep 1, 2022 · US
Method for manufacturing bleached pulp, feedstock, and packaging system
US-2022267957-A1 · Aug 25, 2022 · US
Determining one or more proportional particle group shares in flue gas of a recovery boiler
US-2022268442-A1 · Aug 25, 2022 · US
Determining the reduction rate of a recovery boiler
US-2022220671-A1 · Jul 14, 2022 · US
System for recovering heat from flue gas, control arrangement for use in such a system and a method performed by such a control arrangement
US-2022186927-A1 · Jun 16, 2022 · US
Combustion of streams derived from hot water extraction of wood material
US-2022120036-A1 · Apr 21, 2022 · US
Smelt shattering method and apparatus
US-2022074142-A1 · Mar 10, 2022 · US
Smelt spout cleaning assembly
US-2021372614-A1 · Dec 2, 2021 · US
Recovery boiler startup burner assembly
US-2021317611-A1 · Oct 14, 2021 · US
Method for obtaining information on quality of combustion of a liquor in a chemical recovery boiler and a method for controlling a chemical recovery boiler
US-2021279390-A1 · Sep 9, 2021 · US
Heat recovery surfaces arrangement in a recovery boiler
US-11105499-B2 · Aug 31, 2021 · US
Disruptor assembly adjustment system and method
US-2021189649-A1 · Jun 24, 2021 · US
Method for controlling carryover in a chemical recovery boiler and a chemical recovery boiler
US-2021071361-A1 · Mar 11, 2021 · US
Black liquor viscosity reducing and anti-scale agent
US-2021062421-A1 · Mar 4, 2021 · US
Method and a system for recovering thermal energy in a system comprising a chemical recovery boiler and a lime kiln
US-10920622-B2 · Feb 16, 2021 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C11/12?
- CPC D21C11/12 is the Cooperative Patent Classification code for “Combustion of pulp liquors.”
- How many patents are filed under CPC D21C11/12 (Combustion of pulp liquors)?
- Our database includes 80 publications tagged with this CPC code.
- Is patent activity under CPC D21C11/12 growing?
- Publication counts under this code: 9 in 2024 vs 5 in 2025 (latest complete years).