F27D 3/1545
Equipment for removing or retaining slag
Official title: {Equipment for removing or retaining slag}
F27D3/1545 (Equipment for removing or retaining slag) appears on 129 US grants and 72 published applications in this corpus.
Search patents in F27D- Granted patents
- 129
- Published applications
- 72
- Assignees
- 94
- Inventors
- 269
- Latest grant
- 15 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 4 | 0 |
| 1999 | 6 | 0 |
| 2000 | 3 | 0 |
| 2001 | 4 | 2 |
| 2002 | 5 | 2 |
| 2003 | 5 | 8 |
| 2004 | 5 | 4 |
| 2005 | 1 | 1 |
| 2006 | 0 | 4 |
| 2007 | 2 | 3 |
| 2008 | 1 | 2 |
| 2009 | 5 | 2 |
| 2010 | 0 | 0 |
| 2011 | 2 | 2 |
| 2012 | 3 | 3 |
| 2013 | 1 | 1 |
| 2014 | 2 | 3 |
| 2015 | 1 | 2 |
| 2016 | 2 | 4 |
| 2017 | 1 | 0 |
| 2018 | 3 | 3 |
| 2019 | 0 | 6 |
| 2020 | 4 | 5 |
| 2021 | 2 | 1 |
| 2022 | 4 | 3 |
| 2023 | 1 | 6 |
| 2024 | 2 | 3 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Furnace, fluid feed component, fluid reforming system and method of reforming a fluid15 Jul 2025US 12,359,872 B2Burnstar Technologies (Pty) Ltd
- Slag door pusher18 Jun 2024US 12,013,186 B2KT-Grant, Inc.
- Method and installation for removing slag from metallurgical melts12 Mar 2024US 11,926,879 B2RIA Cast House Enginering GmbH
- Slag door for a melting furnace28 Mar 2023US 11,614,283 B2Danieli & C. Officine Meccaniche SpA
- Roller treatment process and treatment device suitable for total-amount steel slag treatment6 Dec 2022US 11,519,043 B2Baoshan Iron & Steel Co., Ltd.
- Melting furnace13 Aug 2026US 2026/0235363 A1Kubota Corporation
- Furnace, fluid feed component, fluid reforming system and method of reforming a fluid9 Oct 2025US 2025/0314427 A1Burnstar Technologies (Pty) Ltd
- Slag door pusher10 Oct 2024US 2024/0337446 A1KT-Grant, Inc.
- Direct bath smelting process with fast quench of molten material in hot offgas22 Aug 2024US 2024/0279757 A1Nucor Corporation
- Method of dross extraction using heated nitrogen and accumulated pressure displacement nozzles25 Jan 2024US 2024/0026510 A1Cleveland-Cliffs Steel Properties Inc.
Most cited
By later US patents
- Monolithic jet column reactor pump113US 5,863,314 AAlphatech, Inc. · 1999
- Slag control method and apparatus91US 5,505,435 AIndustrial Maintenance and Contract Services · 1996
- Molten aluminum refining apparatus56US 5,846,481 A1998
- Direct smelting vessel and direct smelting process43US 6,322,745 B1Technological Resources Pty. Limited · 2001
- Direct smelting vessel32US 6,585,929 B1Technological Resources Pty. Limited · 2003