F23K 2201/00
Pretreatment of solid fuel
F23K2201/00 (Pretreatment of solid fuel) appears on 320 US grants and 327 published applications in this corpus.
Search patents in F23K- Granted patents
- 320
- Published applications
- 327
- Assignees
- 204
- Inventors
- 708
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 8 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 4 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 7 | 0 |
| 2000 | 10 | 0 |
| 2001 | 8 | 1 |
| 2002 | 5 | 4 |
| 2003 | 4 | 4 |
| 2004 | 3 | 6 |
| 2005 | 4 | 5 |
| 2006 | 2 | 11 |
| 2007 | 5 | 15 |
| 2008 | 3 | 10 |
| 2009 | 8 | 8 |
| 2010 | 6 | 22 |
| 2011 | 11 | 29 |
| 2012 | 20 | 26 |
| 2013 | 21 | 23 |
| 2014 | 17 | 34 |
| 2015 | 18 | 20 |
| 2016 | 11 | 21 |
| 2017 | 20 | 13 |
| 2018 | 17 | 18 |
| 2019 | 15 | 4 |
| 2020 | 14 | 15 |
| 2021 | 13 | 4 |
| 2022 | 5 | 11 |
| 2023 | 5 | 7 |
| 2024 | 6 | 4 |
| 2025 | 6 | 7 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pretreatment desulfurization system for reducing sulfur content of coal by immersing coal in catalyst10 Feb 2026US 12,545,848 B2Lowcarbon Co., Ltd.
- Coal conveying control system and method for thermal power plant27 Jan 2026US 12,535,209 B1Huaneng Chaohu Power Generation Co., Ltd.
- Method and system for pyrolysis9 Dec 2025US 12,492,345 B2Royal Melbourne Institute of Technology
- System and method for combusting high-moisture fuel to generate steam9 Sep 2025US 12,410,914 B2Air Products and Chemicals, Inc.
- Graded oxygen regulating, explosion preventing and recycling system and method for liquid nitrogen wash tail gas25 Mar 2025US 12,259,129 B2Kunming University of Science and Technology
- Method for promoting combustion of combustible and enhancing power output and usage life of combustion equipment27 Aug 2026US 2026/0250589 A1Qingdao Hengnengda Energy Technologies Co., Ltd.
- Feeding and Mixing Device20 Aug 2026US 2026/0241356 A1Orion Engineered Carbons IP GmbH & Co. KG
- Combustion method using fuel combustion device, cement manufacturing method, and cement firing facility30 Apr 2026US 2026/0117967 A1Sumitomo Osaka Cement Co., Ltd.
- System and Method for Pyrolysis26 Mar 2026US 2026/0085243 A1Royal Melbourne Institute of Technology
- Coal conveying control system and method for thermal power plant29 Jan 2026US 2026/0029122 A1Huaneng Chaohu Power Generation Co., Ltd.
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
- Reducing mercury emissions from the burning of coal97US 7,776,301 B2NOx II, Ltd. · 2010
- Method and composition for decreasing emissions of sulfur oxides and nitrogen oxides94US 4,824,441 AGenesis Research Corporation · 1989
- Low sulfur coal additive for improved furnace operation92US 7,332,002 B2ADA Environmental Solutions, LLC · 2008
- Method and apparatus for biomass torrefaction, manufacturing a storable fuel from biomass and producing offsets for the combustion products of fossil fuels and a combustible article of manufacture79US 7,942,942 B22011