F23J
Removal or treatment of combustion products or combustion residues
Official title: REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES (combustion apparatus for consuming smoke or fumes, e.g. exhaust gases, F23G7/06)
F23J (Removal or treatment of combustion products or combustion residues) appears on 3,870 US grants and 3,110 published applications in this corpus.
Search patents in F23J- Granted patents
- 3,870
- Published applications
- 3,110
- Assignees
- 1,931
- Inventors
- 7,760
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 30 | 0 |
| 1977 | 30 | 0 |
| 1978 | 29 | 0 |
| 1979 | 28 | 0 |
| 1980 | 56 | 0 |
| 1981 | 70 | 0 |
| 1982 | 45 | 0 |
| 1983 | 58 | 0 |
| 1984 | 70 | 0 |
| 1985 | 92 | 0 |
| 1986 | 77 | 0 |
| 1987 | 74 | 0 |
| 1988 | 85 | 0 |
| 1989 | 70 | 0 |
| 1990 | 99 | 0 |
| 1991 | 64 | 0 |
| 1992 | 59 | 0 |
| 1993 | 65 | 0 |
| 1994 | 68 | 0 |
| 1995 | 69 | 0 |
| 1996 | 64 | 0 |
| 1997 | 60 | 0 |
| 1998 | 82 | 0 |
| 1999 | 58 | 0 |
| 2000 | 98 | 0 |
| 2001 | 84 | 25 |
| 2002 | 58 | 61 |
| 2003 | 70 | 82 |
| 2004 | 59 | 94 |
| 2005 | 60 | 93 |
| 2006 | 56 | 99 |
| 2007 | 29 | 87 |
| 2008 | 47 | 126 |
| 2009 | 55 | 125 |
| 2010 | 82 | 174 |
| 2011 | 93 | 200 |
| 2012 | 96 | 190 |
| 2013 | 126 | 195 |
| 2014 | 155 | 207 |
| 2015 | 129 | 179 |
| 2016 | 131 | 143 |
| 2017 | 148 | 150 |
| 2018 | 131 | 123 |
| 2019 | 133 | 112 |
| 2020 | 115 | 98 |
| 2021 | 71 | 105 |
| 2022 | 88 | 115 |
| 2023 | 69 | 100 |
| 2024 | 65 | 106 |
| 2025 | 78 | 71 |
| 2026 | 42 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- F23J 15/00Arrangements of devices for treating smoke or fumes2,039
- F23J 2215/00Preventing emissionsIndexing code957
- F23J 2219/00Treatment devicesIndexing code912
- F23J 2217/00Intercepting solidsIndexing code553
- F23J 7/00Arrangement of devices for supplying chemicals to fire400
- F23J 2900/00Special arrangements for conducting or purifying combustion fumesIndexing code398
- F23J 1/00Removing ash, clinker, or slag from combustion chambers394
- F23J 3/00Removing solid residues from passages or chambers beyond the fire388
All 15 main groupsShow fewer
- F23J 13/00Fittings for chimneys or flues333
- F23J 2213/00Chimneys or fluesIndexing code221
- F23J 11/00Devices for conducting smoke or fumes125
- F23J 2211/00Flue gas duct systemsIndexing code73
- F23J 2700/00Ash removal, handling and treatment meansIndexing code70
- F23J 9/00Preventing premature solidification of molten combustion residues41
- F23J 99/00Subject matter not provided for in other groups of this subclass5
Recent patents
- Condensation dedust-demister set6 Oct 2026US 12,752,224 B2
- Thermal processing apparatus with a heating device operated with hydrogen, sustainable cremation, free of CO215 Sep 2026US 12,736,220 B2Albert Hesse Familienstiftung
- Selective catalytic reduction catalyst module support system and installation method15 Sep 2026US 12,736,221 B2Lummus Technology Inc.
- Electrostatic precipitator and control method thereof8 Sep 2026US 12,728,424 B2Samsung Electronics Co., Ltd.
- Pollutant capturer and mobilizer8 Sep 2026US 12,729,640 B2
- Method and device for separating a carbon dioxide-containing gas by partial condensation and/or distillation and/or solidification8 Oct 2026US 2026/0306989 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for separating carbon dioxide from a flue gas stream8 Oct 2026US 2026/0306999 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Building Emission Processing and/or Sequestration Systems and Methods10 Sep 2026US 2026/0266457 A1Carbonquest, Inc.
- Building Emission Processing and/or Sequestration Systems and Methods27 Aug 2026US 2026/0251297 A1Carbonquest, Inc.
- Exhaust adapter27 Aug 2026US 2026/0251300 A1Rinnai Corporation
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Process for removal or mercury vapor and/or vapor of noxious organic compounds and/or nitrogen oxides from flue gas from an incinerator plant206US 4,889,698 AA/S Niro Atomizer · 1989
- Combustion method and apparatus for producing a carbon dioxide end product164US 6,202,574 B1ABB Alstom Power Inc. · 2001
- Rain cap with pivot support means152US 4,383,478 AMercury Metal Products, Inc. · 1983
- Engine exhaust rain cap with extruded bearing support means148US 4,059,045 AMercury Metal Products, Inc. · 1977