F27D 21/00
Arrangement of monitoring devices
Official title: Arrangement of monitoring devices; Arrangement of safety devices
F27D21/00 (Arrangement of monitoring devices) appears on 967 US grants and 987 published applications in this corpus.
Search patents in F27D- Granted patents
- 967
- Published applications
- 987
- Assignees
- 699
- Inventors
- 2,666
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 15 | 0 |
| 1985 | 11 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 11 | 0 |
| 1990 | 16 | 0 |
| 1991 | 14 | 0 |
| 1992 | 14 | 0 |
| 1993 | 11 | 0 |
| 1994 | 15 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 11 | 0 |
| 1998 | 12 | 0 |
| 1999 | 16 | 0 |
| 2000 | 28 | 0 |
| 2001 | 16 | 6 |
| 2002 | 13 | 20 |
| 2003 | 23 | 23 |
| 2004 | 21 | 34 |
| 2005 | 18 | 17 |
| 2006 | 15 | 35 |
| 2007 | 15 | 28 |
| 2008 | 19 | 26 |
| 2009 | 11 | 32 |
| 2010 | 13 | 27 |
| 2011 | 19 | 30 |
| 2012 | 17 | 27 |
| 2013 | 24 | 38 |
| 2014 | 16 | 36 |
| 2015 | 23 | 62 |
| 2016 | 35 | 46 |
| 2017 | 41 | 51 |
| 2018 | 48 | 36 |
| 2019 | 38 | 45 |
| 2020 | 37 | 69 |
| 2021 | 34 | 61 |
| 2022 | 42 | 61 |
| 2023 | 43 | 37 |
| 2024 | 50 | 52 |
| 2025 | 37 | 51 |
| 2026 | 26 | 37 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F27D 21/0014Devices for monitoring temperature320
- F27D 21/02Observation or illuminating devices215
- F27D 2021/0057Security or safety devicesIndexing code99
- F27D 21/0021Devices for monitoring linings for wear99
- F27D 21/0028Devices for monitoring the level of the melt67
- F27D 21/04Arrangement of indicators or alarms65
- F27D 21/0035Devices for monitoring the weight of quantities added to the charge42
- F27D 2021/0007Monitoring the pressureIndexing code20
All 9 subgroupsShow fewer
Recent patents
- Oxygen detection system and reflow furnace using the same29 Sep 2026US 12,746,614 B2Illinois Tool Works Inc.
- System and method for measuring cooling plate thickness in a blast furnace25 Aug 2026US 12,716,717 B2Paul Wurth S. A.
- Manufacturing device for manufacturing a dental object18 Aug 2026US 12,708,495 B2Ivoclar Vivadent AG
- Instrumented plate for oven11 Aug 2026US 12,704,327 B2Saint-Gobain Centre De Recherches Et D ' Etudes Europeen
- Internal data acquisition device for vacuum furnace11 Aug 2026US 12,704,417 B2Fluke Corporation
- Direct-fired kiln using recycled flue gas8 Oct 2026US 2026/0309420 A1ExxonMobil Technology and Engineering Company
- Apparatus and method for refining liquid metal24 Sep 2026US 2026/0284739 A1Danieli & C. Officine Meccaniche SpA
- Device for Monitoring an Apparatus for Induction Heating of a Metal Material, Method for Automatic Loading and Control System17 Sep 2026US 2026/0276308 A1Otto Junker GmbH
- Inspection assembly for a furnace environment3 Sep 2026US 2026/0259007 A1Tallman Technologies Inc.
- Furnace environment inspection system and method27 Aug 2026US 2026/0251396 A1Tallman Technologies Inc.
Most cited
By later US patents
- Temperature control system for a thermal reactor499US 6,441,350 B1Brooks Automation, Inc. · 2002
- Method and apparatus for fabrication of cobalt alloy composite inserts211US 6,063,333 ADennis Tool Company · 2000
- Coal charging car for charging chambers in a coke-oven battery114US 6,152,668 AThyssen Krupp Encoke GmbH · 2000
- Molten metal treatment furnace with level control and method112US 6,503,292 B2Alcoa Inc. · 2003
- Apparatus for controlling the magnesium content of molten aluminum106US 5,029,821 AThe Carborundum Company · 1991