F27D 17/15
Using boilers
Official title: using boilers
F27D17/15 (Using boilers) appears on 75 US grants and 61 published applications in this corpus.
Search patents in F27D- Granted patents
- 75
- Published applications
- 61
- Assignees
- 81
- Inventors
- 234
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 3 |
| 2009 | 0 | 5 |
| 2010 | 1 | 7 |
| 2011 | 5 | 2 |
| 2012 | 2 | 5 |
| 2013 | 0 | 1 |
| 2014 | 2 | 1 |
| 2015 | 4 | 5 |
| 2016 | 1 | 7 |
| 2017 | 4 | 2 |
| 2018 | 3 | 1 |
| 2019 | 3 | 4 |
| 2020 | 5 | 2 |
| 2021 | 2 | 0 |
| 2022 | 1 | 3 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 3 | 2 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- External combustion air preheat17 Feb 2026US 12,553,669 B2Lummus Technology Inc.
- Thermal energy recovery systems for non-contact temperature detection of molten steel in steelmaking process23 Dec 2025US 12,503,736 B1Central South University
- Total heat energy recovery system for furnace-process phosphoric acid26 Aug 2025US 12,398,039 B2Kunming University of Science and Technology
- Method for operating a fired furnace and arrangement comprising such a furnace17 Jun 2025US 12,330,979 B2Linde Aktiengesellschaft
- Waste heat recovery boiler in producing glass beads10 May 2022US 11,326,773 B2
- Sintering furnace11 Jun 2026US 2026/0160495 A1Illinois Tool Works Inc.
- Zero-carbon glass furnace process28 May 2026US 2026/0146797 A1Shanghai Yuanhan Energy & Chemical Technology Co., Ltd.
- Systems and methods for vacuum-assisted deep waste heat recovery14 May 2026US 2026/0132989 A1T2M Global LLC
- Jet-type direct-fired preheating system26 Mar 2026US 2026/0085374 A1Baoshan Iron & Steel Co., Ltd.
- Producing Burnt End Products from Natural, Carbonate-Containing, Granular Materials as Starting Raw Materials11 Dec 2025US 2025/0376386 A1Litherm Technologies GmbH
Most cited
By later US patents
- Method and arrangement for condensing flue gases40US 4,799,941 AScandiaconsult AB · 1989
- Process for generating heat and producing sponge iron19US 4,676,824 AMetallgesellschaft Aktiengesellschaft · 1987
- Method and apparatus for calcining fine grained material17US 4,541,245 AKlockner-Humboldt-Deutz Aktiengesellschaft · 1985
- Regenerator for a regenerative heating system15US 4,807,695 ABritish Gas Corporation · 1989
- Electric furnace waste heat recovery method and apparatus12US 4,099,019 AJoetsu Denro Kogyo Co., Ltd. · 1978