F27D 27/00
Stirring devices for molten material
Official title: Stirring devices for molten material (charging or discharging liquid or molten material F27D3/14)
F27D27/00 (Stirring devices for molten material) appears on 357 US grants and 315 published applications in this corpus.
Search patents in F27D- Granted patents
- 357
- Published applications
- 315
- Assignees
- 185
- Inventors
- 604
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 8 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 7 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 5 | 0 |
| 1997 | 6 | 0 |
| 1998 | 9 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 4 |
| 2003 | 3 | 7 |
| 2004 | 4 | 10 |
| 2005 | 6 | 4 |
| 2006 | 2 | 5 |
| 2007 | 0 | 11 |
| 2008 | 6 | 7 |
| 2009 | 4 | 8 |
| 2010 | 11 | 8 |
| 2011 | 3 | 15 |
| 2012 | 8 | 5 |
| 2013 | 11 | 19 |
| 2014 | 16 | 23 |
| 2015 | 13 | 18 |
| 2016 | 21 | 33 |
| 2017 | 17 | 23 |
| 2018 | 19 | 20 |
| 2019 | 25 | 14 |
| 2020 | 14 | 17 |
| 2021 | 11 | 9 |
| 2022 | 11 | 11 |
| 2023 | 15 | 15 |
| 2024 | 13 | 14 |
| 2025 | 12 | 7 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Magnetic field device and method of driving molten metal22 Sep 2026US 12,744,444 B2Zmag, Ltd.
- Coupling and rotor shaft for molten metal devices24 Feb 2026US 12,560,169 B2Molten Metal Equipment Innovations, LLC
- Degassing launder28 Oct 2025US 12,454,738 B2Pyrotek, Inc.
- Metal melt pump16 Sep 2025US 12,418,230 B2Zmag, Ltd.
- Coupling and rotor shaft for molten metal devices9 Sep 2025US 12,410,800 B2Molten Metal Equipment Innovations, LLC
- Scrap submergence device and related processes1 Oct 2026US 2026/0298542 A1Novelis Inc.
- Graphitization furnace comprising an agitator24 Sep 2026US 2026/0287259 A1Sgl Carbon SE
- Dual volute, reversible pump for pumping molten metal21 May 2026US 2026/0139905 A1
- Rotary device for treating molten metal7 May 2026US 2026/0124673 A1
- Wet hearth melting systems and methods for melting solid metals23 Apr 2026US 2026/0110492 A1The Schaefer Group
Most cited
By later US patents
- Method for agitating metals and producing alloys140US 4,743,428 ACominco Ltd. · 1988
- Rotary device for treating molten metal131US 4,634,105 AFoseco International Limited · 1987
- Method and apparatus for dissolving nickel in molten zinc128US 4,717,540 ACominco Ltd. · 1988
- Gas dispersion apparatus for molten aluminum refining128US 5,364,078 APraxair Technology, Inc. · 1994
- Metal scrap submergence system128US 6,217,823 B1Metaullics Systems Co., L.P. · 2001