F23J 2900/00
Special arrangements for conducting or purifying combustion fumes
Official title: Special arrangements for conducting or purifying combustion fumes; Treatment of fumes or ashes
F23J2900/00 (Special arrangements for conducting or purifying combustion fumes) appears on 398 US grants and 420 published applications in this corpus.
Search patents in F23J- Granted patents
- 398
- Published applications
- 420
- Assignees
- 328
- Inventors
- 1,057
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 8 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 5 | 0 |
| 1995 | 7 | 0 |
| 1996 | 3 | 0 |
| 1997 | 9 | 0 |
| 1998 | 8 | 0 |
| 1999 | 8 | 0 |
| 2000 | 7 | 0 |
| 2001 | 9 | 1 |
| 2002 | 5 | 11 |
| 2003 | 7 | 9 |
| 2004 | 15 | 14 |
| 2005 | 9 | 10 |
| 2006 | 4 | 15 |
| 2007 | 4 | 16 |
| 2008 | 3 | 14 |
| 2009 | 4 | 21 |
| 2010 | 13 | 25 |
| 2011 | 14 | 33 |
| 2012 | 10 | 26 |
| 2013 | 9 | 21 |
| 2014 | 22 | 34 |
| 2015 | 16 | 27 |
| 2016 | 21 | 19 |
| 2017 | 17 | 11 |
| 2018 | 18 | 13 |
| 2019 | 17 | 13 |
| 2020 | 12 | 12 |
| 2021 | 4 | 18 |
| 2022 | 14 | 20 |
| 2023 | 12 | 10 |
| 2024 | 10 | 15 |
| 2025 | 11 | 8 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F23J 2900/15061Deep cooling or freezing of flue gas rich of co2 to deliverIndexing code66
- F23J 2900/13005Protections for chimneys or flue tops against external factorsIndexing code38
- F23J 2900/15004Preventing plume emission at chimney outletIndexing code30
- F23J 2900/01002Cooling of ashes from the combustion chamber by indirect heat exchangersIndexing code28
- F23J 2900/13004Water draining devices associated with fluesIndexing code27
- F23J 2900/01003Ash crushing means associated with ash removal meansIndexing code25
- F23J 2900/13003Means for reducing the noise in smoke conducing ducts or systemsIndexing code23
- F23J 2900/15026Cyclone separators with horizontal axisIndexing code22
All 34 subgroupsShow fewer
- F23J 2900/15081Reheating of flue gasesIndexing code22
- F23J 2900/01001Sorting and classifying ashes or fly-ashes from the combustion chamber before furtherIndexing code21
- F23J 2900/01007Thermal treatments of ashIndexing code18
- F23J 2900/01005Mixing water to ashIndexing code15
- F23J 2900/13001Preventing or reducing corrosion in chimneysIndexing code12
- F23J 2900/01021Removing ashes from the ash pit using reciprocating meansIndexing code9
- F23J 2900/01004Separating water from ashIndexing code8
- F23J 2900/01009Controls related to ash or slag extractionIndexing code8
- F23J 2900/13021Means for supporting the lining of conducting meansIndexing code8
- F23J 2900/15025Cyclone walls forming heat exchangersIndexing code8
- F23J 2900/11001Conducting systems with a gas flow bypass from main flue to anIndexing code7
- F23J 2900/15041Means for absorbing sox using seawaterIndexing code7
- F23J 2900/13022Manufacturing processes for the lining of conducting meansIndexing code5
- F23J 2900/01006Airlock sealing associated with ash removal meansIndexing code4
- F23J 2900/15001Irradiating fumes with electron or light beamsIndexing code4
- F23J 2900/13002Initial heating of the flue before starting combustionIndexing code3
- F23J 2900/15022Electrochemical cell filtersIndexing code3
- F23J 2900/11002Modelling systems adapted for designing arrangements for conducting or purifying combustion fumesIndexing code2
- F23J 2900/13006Devices for heating the chimney top to avoid ice formationIndexing code2
- F23J 2900/15002Cleaning fumes by letting them to pass a molten metal bathIndexing code2
- F23J 2900/15003Supplying fumes with ozoneIndexing code2
- F23J 2900/15023Magnetic filtersIndexing code2
- F23J 2900/15027Preventing emission of co2 at the chimney outlet by using sea weedsIndexing code2
- F23J 2900/13023Ducts with non-circular cross-sectionIndexing code1
- F23J 2900/15021Preventing emission of hexavalent chromium at the chimney outletIndexing code1
- F23J 2900/15024Photocatalytic filtersIndexing code0
Recent patents
- Char collector18 Aug 2026US 12,710,174 B2Scanship AS
- Non-return valve for a flow channel through which a flow of air flows24 Feb 2026US 12,560,242 B2Skoberne GmbH
- Exhaust plume control structure and power generating plant including same24 Feb 2026US 12,560,322 B2General Electric Company
- Building emission processing and/or sequestration systems and methods17 Feb 2026US 12,553,603 B2Carbonquest, Inc.
- Multi-autoclave lateral conversion module30 Dec 2025US 12,508,564 B2Bright Sand, Inc.
- Building Emission Processing and/or Sequestration Systems and Methods27 Aug 2026US 2026/0251297 A1Carbonquest, Inc.
- Carbon dioxide compression system and method with multiphase compression and supercritical pump11 Jun 2026US 2026/0160488 A1Ifp Energies Nouvelles
- Chimney Cover21 May 2026US 2026/0139833 A1
- System for supplying co2 gas to a facility that requires co2 or a mixture comprising co2, such as an abattoir or a greenhouse for cultivating plants5 Feb 2026US 2026/0036363 A1Air Liquide France Industrie
- System And Mechanism For Bottom Ash Feed Regulation To A Low Capacity Conveyor18 Dec 2025US 2025/0383084 A1United Conveyor 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
- Combustion method and apparatus for producing a carbon dioxide end product164US 6,202,574 B1ABB Alstom Power Inc. · 2001
- Firing method for a heat consuming device utilizing oxy-fuel combustion108US 6,702,570 B2Praxair Technology, Inc. · 2004
- Production of hydrogen and removal and sequestration of carbon dioxide from coal-fired furnaces and boilers108US 7,282,189 B22007
- Oxygen fired circulating fluidized bed steam generator105US 6,505,567 B1Alstom (Switzerland) Ltd · 2003