Determining one or more proportional particle group shares in flue gas of a recovery boiler
US-12298004-B2 · May 13, 2025 · US
Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds}
Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds} · 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 | D21C11/06 |
| Official title | Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds} |
| Display label | Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds} |
| Total patents | 49 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is growing.
| Year | Patents |
|---|---|
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 7 |
| 2020 | 6 |
| 2021 | 3 |
| 2022 | 5 |
| 2023 | 9 |
| 2024 | 3 |
| 2025 | 5 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
A process and an apparatus for producing methanol from black liquor
US-2025059119-A1 · Feb 20, 2025 · US
A process and apparatus for producing methanol
US-2025019330-A1 · Jan 16, 2025 · US
Method for removing ammonia from non-condensable gases of a pulp mill
US-12195917-B2 · Jan 14, 2025 · US
A modified air stripping process and apparatus
US-2025011263-A1 · Jan 9, 2025 · US
Method for controlling a chemical recovery boiler and a chemical recovery boiler
US-12104319-B2 · Oct 1, 2024 · US
Process for manufacturing an upgraded bio-oil from black liquor
US-12043957-B2 · Jul 23, 2024 · US
Method and a system for obtaining methanol from foul condensate of a pulping process
US-11898309-B2 · Feb 13, 2024 · US
Method of treating fly ash of a recovery boiler
US-11725341-B2 · Aug 15, 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
Process and apparatus for treating tall oil
US-2023183601-A1 · Jun 15, 2023 · US
A method for removing ammonia from non-condensable gases of a pulp mill
US-2023183920-A1 · Jun 15, 2023 · US
Method and a system for adjusting PH of green liquor dregs
US-11655589-B2 · May 23, 2023 · US
Method and a system for adjusting S/Na-balance of a pulp mill
US-11634864-B2 · Apr 25, 2023 · US
Method and a system for adjusting S/Na-balance of a pulp mill
US-11619000-B2 · Apr 4, 2023 · US
Method for controlling a chemical recovery boiler and a chemical recovery boiler
US-2023057366-A1 · Feb 23, 2023 · US
Method for producing cellulose carbamate
US-2023022830-A1 · Jan 26, 2023 · US
Method of producing chemical pulp
US-11473241-B2 · Oct 18, 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
Frequently asked questions
Answers are generated from the same data shown on this page.
- What is CPC D21C11/06?
- CPC D21C11/06 is the Cooperative Patent Classification code for “Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds}.”
- How many patents are filed under CPC D21C11/06 (Treatment of pulp gases; Recovery of the heat content of the gases; {Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds})?
- Our database includes 49 publications tagged with this CPC code.
- Is patent activity under CPC D21C11/06 growing?
- Publication counts under this code: 3 in 2024 vs 5 in 2025 (latest complete years).