F23J 13/08
Doors or covers specially adapted for smoke-boxes, flues, or chimneys
F23J13/08 (Doors or covers specially adapted for smoke-boxes, flues, or chimneys) appears on 83 US grants and 67 published applications in this corpus.
Search patents in F23J- Granted patents
- 83
- Published applications
- 67
- Assignees
- 44
- Inventors
- 164
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 0 |
| 2004 | 0 | 2 |
| 2005 | 1 | 3 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 3 |
| 2010 | 0 | 2 |
| 2011 | 0 | 4 |
| 2012 | 1 | 1 |
| 2013 | 4 | 4 |
| 2014 | 3 | 8 |
| 2015 | 5 | 2 |
| 2016 | 1 | 5 |
| 2017 | 1 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 1 | 2 |
| 2021 | 2 | 2 |
| 2022 | 0 | 5 |
| 2023 | 0 | 3 |
| 2024 | 3 | 5 |
| 2025 | 5 | 3 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Chimney damper assembly3 Mar 2026US 12,565,993 B2
- 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
- Heat exchange flue and heat exchange device21 Oct 2025US 12,449,125 B2
- Portable water heater26 Aug 2025US 12,398,918 B2Zhongshan Powtek Appliances Mfg., Ltd.
- Chimney Cover21 May 2026US 2026/0139833 A1
- Active venting control system23 Apr 2026US 2026/0110442 A1Whirlpool Corporation
- Adjustable Chimney Shroud19 Mar 2026US 2026/0078902 A1Prorok Patents
- Flexible anti-backflow damper for a fireplace system19 Feb 2026US 2026/0049715 A1HNI Technologies Inc.
- Cleanout opening for chimneys8 Jan 2026US 2026/0009536 A1
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
- Vent stack lids and associated systems and methods35US 11,142,699 B2Suncoke Technology and Development LLC · 2021