F27B 3/06
Hearth-type furnaces: with movable working chambers or hearths
Official title: with movable working chambers or hearths, e.g. tiltable {, oscillating or describing a composed movement}
F27B3/06 (Hearth-type furnaces: with movable working chambers or hearths) appears on 121 US grants and 72 published applications in this corpus.
Search patents in F27B- Granted patents
- 121
- Published applications
- 72
- Assignees
- 84
- Inventors
- 213
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 4 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 6 |
| 2003 | 4 | 4 |
| 2004 | 5 | 4 |
| 2005 | 3 | 2 |
| 2006 | 1 | 1 |
| 2007 | 1 | 6 |
| 2008 | 2 | 5 |
| 2009 | 4 | 2 |
| 2010 | 3 | 1 |
| 2011 | 3 | 2 |
| 2012 | 4 | 4 |
| 2013 | 0 | 2 |
| 2014 | 0 | 3 |
| 2015 | 5 | 4 |
| 2016 | 1 | 3 |
| 2017 | 4 | 1 |
| 2018 | 1 | 2 |
| 2019 | 2 | 1 |
| 2020 | 1 | 3 |
| 2021 | 3 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 3 |
| 2024 | 3 | 3 |
| 2025 | 2 | 1 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Expandable silica particles and methods for making and using the same17 Mar 2026US 12,577,150 B2Valunor AG
- Spray-cooled furnace roof with gravity drain14 Oct 2025US 12,442,596 B2Systems Spray-Cooled, Inc.
- DC plasma electric arc furnace for processing solid waste, method of processing solid waste, and products formed from DC plasma electric arc furnace13 May 2025US 12,298,077 B2
- Tilting melting hearth system and method for recycling metal19 Nov 2024US 12,145,197 B2Continuum Powders Corporation
- Expandable silica particles and methods for making and using the same7 May 2024US 11,976,000 B2Valunor AG
- Expandable silica particles and methods for making and using the same2 Jul 2026US 2026/0184620 A1Valunor AG
- Apparatus and method for rotary furnace flame control to melt metal5 Mar 2026US 2026/0063366 A1Air Products and Chemicals, Inc.
- Apparatus and Method for Flame Control to Melt Metal5 Mar 2026US 2026/0063367 A1Air Products and Chemicals, Inc.
- Spray-cooled furnace roof with gravity drain22 Jan 2026US 2026/0022890 A1Systems Spray-Cooled, Inc.
- Melting hearth, cold hearth melting system, and process for producing high temperature metal alloys19 Jun 2025US 2025/0197967 A1Continuum Powders Corporation
Most cited
By later US patents
- Stirring molten metal115US 4,008,884 AAlcan Research and Development Limited · 1977
- Apparatus for continuous steelmaking18US 4,543,124 AIntersteel Technology, Inc. · 1985
- Conveyor residue removal apparatus18US 4,938,866 A1990
- Method for continuous steelmaking16US 4,564,388 AIntersteel Technology, Inc. · 1986
- Method and apparatus for melting titanium using a combination of plasma torches and direct arc electrodes16US 6,868,896 B22005