C21B 7/24
Test rods or other checking devices
C21B7/24 (Test rods or other checking devices) appears on 132 US grants and 115 published applications in this corpus.
Search patents in C21B- Granted patents
- 132
- Published applications
- 115
- Assignees
- 87
- Inventors
- 387
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 5 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 0 | 0 |
| 2003 | 2 | 2 |
| 2004 | 2 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 3 |
| 2007 | 0 | 8 |
| 2008 | 0 | 1 |
| 2009 | 1 | 3 |
| 2010 | 5 | 3 |
| 2011 | 4 | 4 |
| 2012 | 0 | 1 |
| 2013 | 4 | 2 |
| 2014 | 2 | 2 |
| 2015 | 2 | 5 |
| 2016 | 0 | 5 |
| 2017 | 3 | 1 |
| 2018 | 4 | 2 |
| 2019 | 0 | 4 |
| 2020 | 2 | 1 |
| 2021 | 1 | 5 |
| 2022 | 3 | 12 |
| 2023 | 0 | 8 |
| 2024 | 6 | 16 |
| 2025 | 9 | 12 |
| 2026 | 9 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System and method for measuring cooling plate thickness in a blast furnace25 Aug 2026US 12,716,717 B2Paul Wurth S. A.
- System and method for measuring the thickness of refractories19 May 2026US 12,631,447 B2Saint-Gobain do Brasil Produtos Industriais e Para Construção Ltda.
- Optimal calculation method of energy operating condition in iron mill, optimal calculation device of energy operating condition in iron mill, and running method of iron mill12 May 2026US 12,624,403 B2Jfe Steel Corporation
- Method for operating blast furnace12 May 2026US 12,624,404 B2Jfe Steel Corporation
- Liquid level detection method and detection apparatus for the same, molten material liquid level detection method and detection apparatus for the same, and method for operating vertical furnace24 Mar 2026US 12,584,690 B2Jfe Steel Corporation
- Estimating element content in molten material at openings of metallurgical vessels8 Oct 2026US 2026/0309629 A1Paul Wurth S. A.
- Estimating element content in molten material at openings of metallurgical vessels8 Oct 2026US 2026/0309630 A1Paul Wurth S. A.
- Iron ore reducing and melting apparatus and method24 Sep 2026US 2026/0286453 A1Paul Wurth S. A.
- Hot metal temperature control method, hot metal temperature control device, hot metal temperature control system, and terminal device20 Aug 2026US 2026/0242883 A1Jfe Steel Corporation
- Furnace heat prediction data creation device and method therefor, and furnace heat prediction device and method therefor6 Aug 2026US 2026/0228384 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
Most cited
By later US patents
- Method and apparatus for sampling measurement data from a chemical process50US 4,590,466 APharos AB · 1986
- Scanning radar23US 4,219,814 ARCA Corporation · 1980
- Method and apparatus for monitoring temperature of blast furnace and temperature control system using temperature monitoring apparatus21US 5,356,220 AKawasaki Steel Corporation · 1994
- Infra-red profilometer17US 4,110,617 AS.A. des Anciens Establissements Paul Wurth · 1978
- Apparatus for monitoring the surface of the charge of a shaft furnace17US 4,322,627 ACentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie · 1982