F28D 2021/0024
For combustion apparatus
Official title: {for combustion apparatus, e.g. for boilers}
F28D2021/0024 (For combustion apparatus) appears on 147 US grants and 207 published applications in this corpus.
Search patents in F28D- Granted patents
- 147
- Published applications
- 207
- Assignees
- 99
- Inventors
- 368
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 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 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 4 |
| 2013 | 0 | 1 |
| 2014 | 0 | 4 |
| 2015 | 0 | 3 |
| 2016 | 1 | 10 |
| 2017 | 5 | 12 |
| 2018 | 4 | 22 |
| 2019 | 15 | 18 |
| 2020 | 13 | 31 |
| 2021 | 22 | 26 |
| 2022 | 20 | 30 |
| 2023 | 22 | 17 |
| 2024 | 16 | 14 |
| 2025 | 17 | 7 |
| 2026 | 8 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Heat transfer enhancement pipe as well as cracking furnace and atmospheric and vacuum heating furnace including the same23 Jun 2026US 12,663,224 B2Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
- Heat exchanger baffles and methods for manufacturing the same19 May 2026US 12,631,409 B2Bradford White Corporation
- Cooking system and heat exchanger with combustion chamber12 May 2026US 12,622,436 B2
- Rotary batch preheater14 Apr 2026US 12,600,657 B2
- Integrated anode for a heat exchanger17 Feb 2026US 12,553,644 B2Rheem Manufacturing Company
- Cooking system and heat exchanger30 Jul 2026US 2026/0218986 A1
- Integrated Anode For A Heat Exchanger18 Jun 2026US 2026/0168701 A1Rheem Manufacturing Company
- Heat exchange apparatus14 May 2026US 2026/0132993 A1Rinnai Corporation
- Rotary Batch Preheater26 Mar 2026US 2026/0084995 A1
- Multi-half pipe heat exchange system for electric arc, metallurgical or refining furnaces and system thereof29 Jan 2026US 2026/0029197 A1Amerifab, Inc.
Most cited
By later US patents
- Heat pipe37US 4,523,636 AStirling Thermal Motors, Inc. · 1985
- Gas-fired steam cooker13US 4,552,123 AThermo Electron Corporation · 1985
- Heat transfer fin and heat exchanger using thereof10US 10,254,053 B2Rinnai Corporation · 2019
- Heat exchange device and heat source machine9US 10,890,356 B2Noritz Corporation · 2021
- Corrosion resistance treatment of condensing heat exchanger steel structures exposed to a combustion environment8US 6,725,911 B2Gas Research Institute · 2004