F23C 9/003
Combustion apparatus characterised by arrangements for returning combustion products or flue gases
Official title: {for pulverulent fuel (for fluidized bed F23C10/02)}
F23C9/003 (Combustion apparatus characterised by arrangements for returning combustion products or flue gases) appears on 83 US grants and 80 published applications in this corpus.
Search patents in F23C- Granted patents
- 83
- Published applications
- 80
- Assignees
- 75
- Inventors
- 269
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 3 |
| 2009 | 1 | 9 |
| 2010 | 0 | 12 |
| 2011 | 1 | 11 |
| 2012 | 2 | 11 |
| 2013 | 12 | 5 |
| 2014 | 9 | 6 |
| 2015 | 2 | 3 |
| 2016 | 4 | 0 |
| 2017 | 2 | 1 |
| 2018 | 2 | 0 |
| 2019 | 0 | 1 |
| 2020 | 2 | 2 |
| 2021 | 2 | 4 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 1 |
| 2025 | 2 | 2 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Burner, system, and method for hydrogen-enhanced pulverized coal ignition3 Mar 2026US 12,565,990 B2Air Products and Chemicals, Inc.
- Carbon-based oxygen-enriched combustion method for recirculation of flue gas from cement kiln24 Jun 2025US 12,339,062 B2Hangzhou Turning Energy Technology Development Co., Ltd.
- Modular pressurized coal combustion (MPCC) for flexible generation11 Feb 2025US 12,222,101 B2Washington University
- Device and method for chemical looping combustion, having a particle separator provided with an inclined intake duct27 Feb 2024US 11,913,640 B2Ifp Energies Nouvelles
- Combustion system comprising an annular shroud burner10 Oct 2023US 11,781,751 B2Jupiter Oxygen Corporation
- A burner and a process for combusting metal powder3 Sep 2026US 2026/0258942 A1
- Burner, System, and Method for Hydrogen-Enhanced Pulverized Coal Ignition23 Apr 2026US 2026/0110429 A1Air Products and Chemicals, Inc.
- Modular pressurized coal combustion plant (mccp) for flexible generation26 Jun 2025US 2025/0207772 A1Washington University
- System and method for treating coal-fired flue gas22 May 2025US 2025/0161864 A1Huaneng Clean Energy Research Institute
- Burner, System, and Method for Hydrogen-Enhanced Pulverized Coal Ignition18 Jan 2024US 2024/0019118 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Combustion method and apparatus for producing a carbon dioxide end product164US 6,202,574 B1ABB Alstom Power Inc. · 2001
- Method of desulfurizing flue gases of coal firings87US 4,519,995 AOsterreichische Draukraftwerke Aktiengesellschaft · 1985
- Oxy/fuel combustion system with minimized flue gas recirculation68US 8,316,784 B2Air Products and Chemicals, Inc. · 2012
- Composition for use in reducing air contaminants from combustion effluents64US 4,843,980 AFrontend International Technologies, Inc. · 1989
- Carbon dioxide capture power generation system58US 8,500,881 B2Hitachi, Ltd. · 2013