F27B 1/00
Shaft or like vertical or substantially vertical furnaces
F27B1/00 (Shaft or like vertical or substantially vertical furnaces) appears on 704 US grants and 561 published applications in this corpus.
Search patents in F27B- Granted patents
- 704
- Published applications
- 561
- Assignees
- 399
- Inventors
- 1,568
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 19 | 0 |
| 1978 | 13 | 0 |
| 1979 | 5 | 0 |
| 1980 | 12 | 0 |
| 1981 | 21 | 0 |
| 1982 | 23 | 0 |
| 1983 | 25 | 0 |
| 1984 | 14 | 0 |
| 1985 | 10 | 0 |
| 1986 | 9 | 0 |
| 1987 | 13 | 0 |
| 1988 | 16 | 0 |
| 1989 | 22 | 0 |
| 1990 | 11 | 0 |
| 1991 | 14 | 0 |
| 1992 | 8 | 0 |
| 1993 | 14 | 0 |
| 1994 | 4 | 0 |
| 1995 | 9 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 9 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 3 |
| 2002 | 12 | 4 |
| 2003 | 3 | 3 |
| 2004 | 4 | 14 |
| 2005 | 4 | 6 |
| 2006 | 3 | 8 |
| 2007 | 4 | 16 |
| 2008 | 10 | 21 |
| 2009 | 7 | 17 |
| 2010 | 8 | 23 |
| 2011 | 17 | 36 |
| 2012 | 20 | 26 |
| 2013 | 25 | 12 |
| 2014 | 21 | 20 |
| 2015 | 21 | 37 |
| 2016 | 14 | 33 |
| 2017 | 25 | 25 |
| 2018 | 21 | 26 |
| 2019 | 27 | 24 |
| 2020 | 29 | 21 |
| 2021 | 15 | 23 |
| 2022 | 15 | 28 |
| 2023 | 12 | 36 |
| 2024 | 21 | 47 |
| 2025 | 23 | 24 |
| 2026 | 18 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F27B 1/10Details, accessories or equipment specially adapted for furnaces of these types559
- F27B 1/02Shaft or like vertical or substantially vertical furnaces: with two or more84
- F27B 1/005Wherein no smelting of the charge occurs77
- F27B 1/08Heated otherwise than by solid fuel mixed with charge73
- F27B 1/06Shaft or like vertical or substantially vertical furnaces: of other than up-draught2
Recent patents
- Method for manufacturing direct reduced iron and DRI manufacturing equipment6 Oct 2026US 12,753,452 B2ArcelorMittal
- Apparatus and process for production of burnt lime or dolomite8 Sep 2026US 12,729,156 B2Fels-Werke GmbH
- Metallurgical furnace11 Aug 2026US 12,704,326 B2Metso Metals Oy
- Method for operating a blast furnace plant23 Jun 2026US 12,663,212 B2Paul Wurth S. A.
- Refractory lining design and separation via destructive hydration7 Apr 2026US 12,595,211 B2HarbisonWalker International, Inc.
- Parallel-flow regenerative shaft kiln and method for burning carbonate rock8 Oct 2026US 2026/0309418 A1Maerz Ofenbau AG
- Graphitization furnace comprising widening cross-section8 Oct 2026US 2026/0309421 A1Sgl Carbon SE
- Tuyere for a metallurgical furnace1 Oct 2026US 2026/0297694 A1Paul Wurth S. A.
- Plant and method for burning carbonate rock24 Sep 2026US 2026/0285749 A1Scheuch Management Holding GmbH
- Systems and methods for direct reduction of iron ore24 Sep 2026US 2026/0287255 A1Uchicago Argonne, LLC
Most cited
By later US patents
- Apparatus for producing molten iron by submerged combustion67US 4,270,740 AMidrex Corporation · 1981
- Vertical shaft melting furnace and method of melting65US 4,877,449 AInstitute of Gas Technology · 1989
- Process and apparatus for treatment of excavated landfill material in a plasma fired cupola54US 4,998,486 AWestinghouse Electric Corp. · 1991
- Direct smelting plant43US 8,562,903 B2Technological Resources Pty. Limited · 2013
- Curing systems for materials that consume carbon dioxide and method of use thereof42US 9,221,027 B2Solidia Technologies, Inc. · 2015