F27D 13/00
Apparatus for preheating charges
Official title: Apparatus for preheating charges; Arrangements for preheating charges
F27D13/00 (Apparatus for preheating charges) appears on 242 US grants and 147 published applications in this corpus.
Search patents in F27D- Granted patents
- 242
- Published applications
- 147
- Assignees
- 165
- Inventors
- 581
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 10 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 14 | 0 |
| 1987 | 16 | 0 |
| 1988 | 7 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 9 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 9 | 0 |
| 2001 | 2 | 2 |
| 2002 | 4 | 1 |
| 2003 | 4 | 4 |
| 2004 | 3 | 2 |
| 2005 | 2 | 4 |
| 2006 | 1 | 1 |
| 2007 | 2 | 3 |
| 2008 | 0 | 2 |
| 2009 | 1 | 4 |
| 2010 | 6 | 5 |
| 2011 | 2 | 2 |
| 2012 | 1 | 11 |
| 2013 | 2 | 7 |
| 2014 | 4 | 5 |
| 2015 | 7 | 13 |
| 2016 | 5 | 8 |
| 2017 | 7 | 12 |
| 2018 | 8 | 4 |
| 2019 | 6 | 4 |
| 2020 | 8 | 5 |
| 2021 | 4 | 5 |
| 2022 | 5 | 8 |
| 2023 | 4 | 11 |
| 2024 | 6 | 5 |
| 2025 | 7 | 13 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Rotary batch preheater14 Apr 2026US 12,600,657 B2
- Direct flame preheating section for a continuous metal strip processing line31 Mar 2026US 12,590,761 B2Fives Stein
- Method of producing cement clinker and a second calcined material17 Mar 2026US 12,577,156 B2Amrize Technology Switzerland LLC
- Method of producing molten iron using electric furnace including video device3 Mar 2026US 12,566,029 B2Jfe Steel Corporation
- Powder-gas heat exchanger and applications thereof19 Aug 2025US 12,391,611 B2Calix, Inc.
- Scrap dryer and pre-heater apparatus for electric arc furnace1 Oct 2026US 2026/0298541 A1SSAB Enterprises, LLC
- Kiln and method for burning carbonate rock6 Aug 2026US 2026/0225953 A1Maerz Ofenbau AG
- Sintering furnace11 Jun 2026US 2026/0160495 A1Illinois Tool Works Inc.
- Rotary batch and cullet preheater system control scheme28 May 2026US 2026/0145979 A1
- Waste heat recovery system and method of recovering waste heat from a furnace21 May 2026US 2026/0138906 A1
Most cited
By later US patents
- Process and an apparatus for producing metals and metal alloys36US 6,440,195 B1Technological Resources Pty. Limited · 2002
- Process for removing volatiles from metal28US 4,784,603 AAluminum Company of America · 1988
- Heating and/or drying apparatus27US 4,784,216 ACMI Corporation · 1988
- Method of drying particulate material26US 4,760,650 A1988
- Smelting plant with removable shaft-like charging material preheater26US 5,153,894 AFuchs Technology AG · 1992