F23J 13/00
Fittings for chimneys or flues
Official title: Fittings for chimneys or flues (side-supporting means for chimney stacks E04H12/20; ladders permanently attached to chimneys E06C9/00; draught-inducing apparatus associated with chimneys or flues F23L17/00; tops for chimneys, terminals for flues F23L17/02)
F23J13/00 (Fittings for chimneys or flues) appears on 333 US grants and 276 published applications in this corpus.
Search patents in F23J- Granted patents
- 333
- Published applications
- 276
- Assignees
- 209
- Inventors
- 667
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 7 | 0 |
| 1978 | 3 | 0 |
| 1979 | 6 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 11 | 0 |
| 1985 | 12 | 0 |
| 1986 | 9 | 0 |
| 1987 | 10 | 0 |
| 1988 | 8 | 0 |
| 1989 | 7 | 0 |
| 1990 | 5 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 5 | 0 |
| 1994 | 8 | 0 |
| 1995 | 11 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 5 |
| 2003 | 7 | 1 |
| 2004 | 4 | 6 |
| 2005 | 2 | 9 |
| 2006 | 3 | 10 |
| 2007 | 0 | 15 |
| 2008 | 3 | 9 |
| 2009 | 3 | 11 |
| 2010 | 5 | 13 |
| 2011 | 1 | 6 |
| 2012 | 9 | 9 |
| 2013 | 8 | 14 |
| 2014 | 11 | 17 |
| 2015 | 9 | 14 |
| 2016 | 6 | 12 |
| 2017 | 11 | 17 |
| 2018 | 10 | 13 |
| 2019 | 17 | 14 |
| 2020 | 14 | 12 |
| 2021 | 7 | 13 |
| 2022 | 14 | 16 |
| 2023 | 5 | 7 |
| 2024 | 7 | 8 |
| 2025 | 9 | 12 |
| 2026 | 4 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Pass-through device for a chimney31 Mar 2026US 12,590,701 B2Jeremias Inc.
- Chimney damper assembly3 Mar 2026US 12,565,993 B2
- 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
- Active venting control system30 Dec 2025US 12,510,254 B2Whirlpool Corporation
- Exhaust adapter27 Aug 2026US 2026/0251300 A1Rinnai Corporation
- Jig for exhaust structure work of chamber25 Jun 2026US 2026/0177321 A1
- Chimney Cover21 May 2026US 2026/0139833 A1
- Exhaust port member23 Apr 2026US 2026/0110431 A1Rinnai Corporation
- Active venting control system23 Apr 2026US 2026/0110442 A1Whirlpool Corporation
Most cited
By later US patents
- 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
- Catalyst door system90US 6,412,221 B1Thermal Engineering International · 2002
- Mechanical sealing means86US 4,093,245 AMosser Industries, Inc. · 1978
- Water heater construction and method of heating water53US 5,020,512 AState Industries, Inc. · 1991