F23N 2221/02
Pretreatment or prehandling: using belt conveyors
Official title: using belt conveyors
F23N2221/02 (Pretreatment or prehandling: using belt conveyors) appears on 9 US grants and 1 published applications in this corpus.
Search patents in F23N- Granted patents
- 9
- Published applications
- 1
- Assignees
- 7
- Inventors
- 20
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Coal conveying control system and method for thermal power plant27 Jan 2026US 12,535,209 B1Huaneng Chaohu Power Generation Co., Ltd.
- Control system for an incineration plant, such as for instance a refuse incineration plant30 Mar 2004US 6,712,012 B1Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Wood residue disposal system2 May 2000US 6,055,915 A
- Method and apparatus for extracting heat from a combustible material5 Feb 1991US 4,989,523 AGeneral Technology, Inc.
- Underfed stoker boiler for burning bituminous coal and other solid fuel particles6 Oct 1987US 4,697,530 ADumont Holding Company
Most cited
By later US patents
- Boiler control providing improved operation with fuels having variable heating values18US 4,064,699 AWestinghouse Electric Corp. · 1977
- Underfed stoker boiler for burning bituminous coal and other solid fuel particles16US 4,697,530 ADumont Holding Company · 1987
- Boiler control system11US 4,278,052 ALeeds & Northrup Company · 1981
- Wood residue disposal system11US 6,055,915 A2000
- Boiler control having a heating value computer and providing improved operation with fuels having variable heating values7US 4,064,698 AWestinghouse Electric Corp. · 1977