Recovery boiler startup burner assembly
US-12590412-B2 · Mar 31, 2026 · US
Concentrating spent liquor by evaporation (evaporators B01D)
Concentrating spent liquor by evaporation (evaporators B01D) · 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 | D21C11/10 |
| Official title | Concentrating spent liquor by evaporation (evaporators B01D) |
| Display label | Concentrating spent liquor by evaporation (evaporators B01D) |
| Total patents | 58 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 9 |
| 2016 | 2 |
| 2017 | 8 |
| 2018 | 2 |
| 2019 | 6 |
| 2020 | 4 |
| 2021 | 5 |
| 2022 | 8 |
| 2023 | 4 |
| 2024 | 5 |
| 2025 | 4 |
| 2026 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Method for preparing biomechanical unbleached pulp from wheat straw and full utilization of by-products thereof
US-12454792-B2 · Oct 28, 2025 · US
Method for preparing unbleached biomechanical pulp by hot steam in coordination with biological enzyme treatment of wheat straw and full utilization of by-products thereof
US-12428784-B2 · Sep 30, 2025 · US
Method for recycling waste aramid-mica composite paper
US-12351982-B2 · Jul 8, 2025 · US
Method for separating biomass components by ternary system
US-12221747-B2 · Feb 11, 2025 · US
Recovery boiler startup burner assembly
US-2024417927-A1 · Dec 19, 2024 · US
Determining the reduction rate of a recovery boiler
US-12134859-B2 · Nov 5, 2024 · US
Process for manufacturing an upgraded bio-oil from black liquor
US-12043957-B2 · Jul 23, 2024 · US
Combustion of streams derived from hot water extraction of wood material
US-12000087-B2 · Jun 4, 2024 · US
Black liquor treatment
US-2024150960-A1 · May 9, 2024 · US
Method for separating biomass components by ternary system
US-2023323597-A1 · Oct 12, 2023 · US
A method and arrangement for managing and controlling nitrogen emission from a cyclic liquor flow system in a pulp mill
US-2023241552-A1 · Aug 3, 2023 · US
Method and a system for adjusting PH of green liquor dregs
US-11655589-B2 · May 23, 2023 · US
Smelt spout cleaning assembly
US-11592175-B2 · Feb 28, 2023 · US
Combustion of streams derived from hot water extraction of wood material
US-11512428-B2 · Nov 29, 2022 · US
Method for recycling waste aramid-mica composite paper
US-2022340730-A1 · Oct 27, 2022 · US
A process for manufacturing an upgraded bio-oil from black liquor
US-2022290370-A1 · Sep 15, 2022 · US
A method and a system for adjusting ph of green liquor dregs
US-2022275578-A1 · Sep 1, 2022 · US
Determining the reduction rate of a recovery boiler
US-2022220671-A1 · Jul 14, 2022 · US
Method for preparing biomechanical unbleached pulp from wheat straw and full utilization of by-products thereof
US-2022205177-A1 · Jun 30, 2022 · US
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C11/10?
- CPC D21C11/10 is the Cooperative Patent Classification code for “Concentrating spent liquor by evaporation (evaporators B01D).”
- How many patents are filed under CPC D21C11/10 (Concentrating spent liquor by evaporation (evaporators B01D))?
- Our database includes 58 publications tagged with this CPC code.
- Is patent activity under CPC D21C11/10 growing?
- Publication counts under this code: 5 in 2024 vs 4 in 2025 (latest complete years).