F27B 1/21
Arrangements of devices for discharging
F27B1/21 (Arrangements of devices for discharging) appears on 61 US grants and 46 published applications in this corpus.
Search patents in F27B- Granted patents
- 61
- Published applications
- 46
- Assignees
- 53
- Inventors
- 167
- Latest grant
- 4 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 9 |
| 2008 | 3 | 2 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 2 | 2 |
| 2012 | 2 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 1 | 1 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 0 |
| 2019 | 2 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 2 |
| 2022 | 0 | 3 |
| 2023 | 3 | 6 |
| 2024 | 2 | 1 |
| 2025 | 4 | 6 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for producing supplementary cementitious material4 Nov 2025US 12,459,861 B2Cemgreen APS
- Iron (DRI) between a DRI source and processing equipment for the DRI23 Sep 2025US 12,421,564 B2Midrex Technologies, Inc.
- Method for calcining mineral rock in a regenerative parallel-flow vertical shaft furnace and furnace used1 Jul 2025US 12,344,556 B2S. A. Lhoist Recherche et Developpement
- Method for removing carbon dioxide from a material1 Apr 2025US 12,264,080 B2
- Method and system for heating direct reduced iron (DRI) between a DRI source and processing equipment for the DRI23 Apr 2024US 11,965,221 B2Midrex Technologies, Inc.
- Graphitization furnace comprising widening cross-section8 Oct 2026US 2026/0309421 A1Sgl Carbon SE
- Graphitization furnace27 Aug 2026US 2026/0251394 A1Birla Carbon U.S.A., Inc.
- Shaft furnace for the smelting of copper and method therefor20 Aug 2026US 2026/0242893 A1SMS group GmbH
- Flash smelting furnace, flash smelting furnace operation method, and metal smelting method13 Aug 2026US 2026/0234750 A1JX Advanced Metals Corporation
- Interlocking refractory bricks and refractory layer structures formed therewith31 Jul 2025US 2025/0243101 A1HarbisonWalker International Holdings, Inc.
Most cited
By later US patents
- Rotary valve13US 4,427,136 AHylsa, S. A. · 1984
- Shaft furnace feed device12US 4,040,530 AS. A. des Anciens Etablissements Paul Wurth · 1977
- Smelting plant and method10US 4,083,715 AKlockner-Werke AG · 1978
- Smelting plant and method9US 4,050,683 AKlockner-Werke AG · 1977
- Direct reduced iron discharge system and method9US 6,214,086 B1Midrex International B.V. Rotterdam, Zurich Branch · 2001