F27B 21/00
Open or uncovered sintering apparatus
Official title: Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
F27B21/00 (Open or uncovered sintering apparatus) appears on 177 US grants and 112 published applications in this corpus.
Search patents in F27B- Granted patents
- 177
- Published applications
- 112
- Assignees
- 140
- Inventors
- 433
- Latest grant
- 2 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 6 | 0 |
| 2002 | 9 | 8 |
| 2003 | 7 | 9 |
| 2004 | 8 | 5 |
| 2005 | 4 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 3 |
| 2011 | 2 | 7 |
| 2012 | 2 | 2 |
| 2013 | 2 | 7 |
| 2014 | 3 | 6 |
| 2015 | 8 | 6 |
| 2016 | 1 | 2 |
| 2017 | 6 | 8 |
| 2018 | 4 | 7 |
| 2019 | 5 | 5 |
| 2020 | 5 | 8 |
| 2021 | 0 | 3 |
| 2022 | 1 | 5 |
| 2023 | 7 | 8 |
| 2024 | 5 | 1 |
| 2025 | 6 | 5 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Device, system and method for detecting transport boats2 Jun 2026US 12,646,631 B2ALD Vacuum Technologies GmbH
- Method for producing lithium transition metal complex oxide19 May 2026US 12,633,533 B2Panasonic Intellectual Property Management Co., Ltd.
- Plate-formed grate element for a movable grate of a furnace31 Mar 2026US 12,590,700 B2Kanadevia Inova Denmark A/S
- Grate bar for a pelletizing or sintering machine9 Dec 2025US 12,492,866 B2Paul Wurth Deutschland GmbH
- Stepwise gas distribution and graded oxygen supplementation device for distribution of high-ratio circulating flue gas2 Dec 2025US 12,487,032 B1Institute of Process Engineering, Chinese Academy of Sciences
- Sintering furnace11 Jun 2026US 2026/0160495 A1Illinois Tool Works Inc.
- Calcination vessel for manufacturing electrode active material26 Mar 2026US 2026/0085890 A1L&F Co., Ltd.
- Improved sintering or induration belt for sinter or pellet plants15 Jan 2026US 2026/0016229 A1Paul Wurth S. A.
- Novel furnace door heating apparatus and horizontal sintering furnace thereof21 Aug 2025US 2025/0264278 A1Hunan Linxin New Materials Co., Ltd.
- Lithium stuffed garnet setter plates for solid electrolyte fabrication29 May 2025US 2025/0172340 A1QuantumScape Battery, Inc.
Most cited
By later US patents
- Method and apparatus for fabrication of cobalt alloy composite inserts211US 6,063,333 ADennis Tool Company · 2000
- Method for making sintered abrasive grain118US 5,567,150 AMinnesota Mining and Manufacturing Company · 1996
- Method and apparatus for fabrication of cobalt alloy composite inserts83US 6,500,226 B1Dennis Tool Company · 2002
- Method for fabrication and sintering composite inserts75US 5,848,348 A1998
- Apparatus for sintering abrasive grain54US 5,489,204 AMinnesota Mining and Manufacturing Company · 1996