F27M
Indexing scheme relating to aspects of the charges or furnaces, kilns, ovens
Official title: Indexing scheme relating to aspects of the charges or furnaces, kilns, ovens or retorts
F27M (Indexing scheme relating to aspects of the charges or furnaces, kilns, ovens) appears on 355 US grants and 212 published applications in this corpus.
Search patents in F27M- Granted patents
- 355
- Published applications
- 212
- Assignees
- 326
- Inventors
- 893
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 9 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 13 | 0 |
| 1981 | 15 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 14 | 0 |
| 1985 | 11 | 0 |
| 1986 | 21 | 0 |
| 1987 | 9 | 0 |
| 1988 | 14 | 0 |
| 1989 | 8 | 0 |
| 1990 | 17 | 0 |
| 1991 | 13 | 0 |
| 1992 | 11 | 0 |
| 1993 | 9 | 0 |
| 1994 | 5 | 0 |
| 1995 | 11 | 0 |
| 1996 | 7 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 4 |
| 2002 | 4 | 3 |
| 2003 | 4 | 9 |
| 2004 | 6 | 6 |
| 2005 | 2 | 5 |
| 2006 | 3 | 3 |
| 2007 | 3 | 1 |
| 2008 | 1 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 0 |
| 2011 | 1 | 2 |
| 2012 | 3 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 3 |
| 2015 | 3 | 6 |
| 2016 | 2 | 11 |
| 2017 | 3 | 7 |
| 2018 | 9 | 6 |
| 2019 | 4 | 6 |
| 2020 | 4 | 11 |
| 2021 | 3 | 7 |
| 2022 | 12 | 14 |
| 2023 | 7 | 25 |
| 2024 | 10 | 22 |
| 2025 | 12 | 31 |
| 2026 | 10 | 25 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
Recent patents
- Electrode ovens and electrode heating and drying methods15 Sep 2026US 12,736,286 B1Henkel Enterprises, LLC
- Apparatus and process for production of burnt lime or dolomite8 Sep 2026US 12,729,156 B2Fels-Werke GmbH
- Sealing structure of horizontal rotary pyrolysis kiln1 Sep 2026US 12,723,811 B2Henan Longcheng Coal High Efficiency Technology Application Co., Ltd.
- Calcination unit for decarbonating raw materials7 Jul 2026US 12,674,621 B2Fives Fcb
- Apparatus and process for calcining feed material30 Jun 2026US 12,668,535 B2Air Products and Chemicals, Inc.
- Multiple hearth furnace for placing a solid and a gas in contact8 Oct 2026US 2026/0309411 A1Avril
- Co2-free production of artificial pozzolans, in particular from clay10 Sep 2026US 2026/0265126 A1thyssenkrupp AG
- Method and system for the production of different products under different reduction conditions in different portions of a shaft furnace27 Aug 2026US 2026/0250790 A1Midrex Technologies, 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
Most cited
By later US patents
- Method for producing hydrocarbon gas from waste126US 5,395,405 AMolten Metal Technology, Inc. · 1995
- Method and apparatus for injection of a liquid waste into a molten bath124US 5,436,210 AMolten Metal Technology, Inc. · 1995
- Method for top-charging solid waste into a molten metal bath115US 5,491,279 AMolten Metal Technology, Inc. · 1996
- Feed processing employing dispersed molten droplets114US 5,744,117 AMolten Metal Technology, Inc. · 1998
- Method and apparatus for top-charging solid waste into a molten metal bath113US 5,571,486 AMolten Metal Technology, Inc. · 1996