D21C 11/12
Combustion of pulp liquors
D21C11/12 (Combustion of pulp liquors) appears on 288 US grants and 148 published applications in this corpus.
Search patents in D21C- Granted patents
- 288
- Published applications
- 148
- Assignees
- 139
- Inventors
- 473
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 5 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 4 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 12 | 0 |
| 1996 | 12 | 0 |
| 1997 | 16 | 0 |
| 1998 | 16 | 0 |
| 1999 | 14 | 0 |
| 2000 | 10 | 0 |
| 2001 | 11 | 3 |
| 2002 | 6 | 6 |
| 2003 | 3 | 3 |
| 2004 | 9 | 6 |
| 2005 | 3 | 7 |
| 2006 | 1 | 6 |
| 2007 | 3 | 6 |
| 2008 | 3 | 4 |
| 2009 | 5 | 6 |
| 2010 | 3 | 6 |
| 2011 | 4 | 11 |
| 2012 | 5 | 5 |
| 2013 | 4 | 4 |
| 2014 | 8 | 5 |
| 2015 | 5 | 5 |
| 2016 | 0 | 4 |
| 2017 | 6 | 6 |
| 2018 | 5 | 9 |
| 2019 | 9 | 8 |
| 2020 | 4 | 3 |
| 2021 | 4 | 10 |
| 2022 | 5 | 11 |
| 2023 | 7 | 5 |
| 2024 | 10 | 6 |
| 2025 | 6 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cooling shield for a liquor injection pipe of a liquor gun, liquor gun system comprising the cooling shield, and method for cooling a liquor injection pipe in a liquor gun system15 Sep 2026US 12,736,217 B2Valmet Corporation
- Recovery boiler startup burner assembly31 Mar 2026US 12,590,412 B2Andritz Inc.
- Method for the gasification of a black liquor18 Nov 2025US 12,473,689 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- System for recovering heat from flue gas, control arrangement for use in such a system and a method performed by such a control arrangement24 Jun 2025US 12,338,996 B2Valmet Corporation
- Black liquor viscosity reducing and anti-scale agent17 Jun 2025US 12,331,461 B2Ecolab USA Inc.
- Calcination reactor arrangement, calcination system and calcination method20 Aug 2026US 2026/0241355 A1Limearc Process AB
- System and Process for Reducing Chemical Losses in Treating Ash Produced in a Recovery Boiler of a Wood Pulping Process12 Feb 2026US 2026/0042676 A1Veolia Water Technologies, Inc.
- A gasket arrangement for a protruding bar of a boiler and a method of operating the gasket arrangement30 Jan 2025US 2025/0034808 A1Andritz Inc.
- Recovery boiler startup burner assembly19 Dec 2024US 2024/0417927 A1Andritz Inc.
- Method and Apparatus for Improved Operation of Chemical Recovery Boilers5 Dec 2024US 2024/0401800 A1Sullivan, Higgins, and Brion Power Plant Engineering, LLC
Most cited
By later US patents
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Indirectly heated thermochemical reactor apparatus and processes143US 5,059,404 AManufacturing and Technology Conversion International, Inc. · 1991
- Process for detoxifying waste materials by steam reformation through endothermic gasification reactions104US 6,149,765 AManufacturing and Technology Conversion International, Inc. · 2000
- Indirectly heated thermochemical reactor apparatus and processes101US 5,306,481 AManufacturing and Technology Conversion International, Inc. · 1994
- Process for oxygen pulping of lignocellulosic material and recorvery of pulping chemicals96US 6,770,168 B1Kiram AB · 2004