C21C 5/44
Refractory linings
C21C5/44 (Refractory linings) appears on 164 US grants and 69 published applications in this corpus.
Search patents in C21C- Granted patents
- 164
- Published applications
- 69
- Assignees
- 113
- Inventors
- 368
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 5 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 7 | 0 |
| 1981 | 10 | 0 |
| 1982 | 5 | 0 |
| 1983 | 10 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 7 | 0 |
| 1988 | 10 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 5 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 0 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 4 |
| 2005 | 4 | 0 |
| 2006 | 2 | 4 |
| 2007 | 2 | 1 |
| 2008 | 0 | 1 |
| 2009 | 1 | 0 |
| 2010 | 0 | 3 |
| 2011 | 0 | 3 |
| 2012 | 2 | 5 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 1 | 1 |
| 2016 | 2 | 4 |
| 2017 | 5 | 3 |
| 2018 | 1 | 2 |
| 2019 | 6 | 8 |
| 2020 | 4 | 1 |
| 2021 | 1 | 5 |
| 2022 | 0 | 5 |
| 2023 | 5 | 1 |
| 2024 | 1 | 3 |
| 2025 | 4 | 3 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Electric induction heating and melting furnace refractory life cycle wear imaging and processing28 Jul 2026US 12,692,564 B2Inductotherm Corp.
- PGM converting process and jacketed rotary converter8 Apr 2025US 12,270,090 B2
- Method for monitoring the wear of a refractory lining of a blast furnace8 Apr 2025US 12,270,606 B2ArcelorMittal
- Method for protecting an inner wall of a shaft furnace25 Feb 2025US 12,235,047 B2Paul Wurth S. A.
- System and method for estimating both thickness and wear state of refractory material of a metallurgical furnace7 Jan 2025US 12,188,904 B2ArcelorMittal
- Refractory monitoring system for high-voltage and high-temperature environment applications6 Aug 2026US 2026/0227184 A1
- Installation for applying a lining composition in the form of dry particulate material to form a working lining onto a permanent refractory layer of a tundish23 Oct 2025US 2025/0326031 A1Vesuvius Group S. A.
- Ruhrstahl-heraeus snorkel design21 Aug 2025US 2025/0263808 A1HarbisonWalker International Holdings, Inc.
- Refractory layer structures and assemblies for vessels exposed to molten materials31 Jul 2025US 2025/0244077 A1HarbisonWalker International Holdings, Inc.
- Apparatus and method for preventing lining disruptions exposed to elevated temperature11 Jul 2024US 2024/0230234 A9HarbisonWalker International Holdings, Inc.
Most cited
By later US patents
- Scanning laser measurement system69US 5,212,738 AMartin Marietta Magnesia Specialties Inc. · 1993
- Automated apparatus for lining the wall of a vessel with bricks33US 4,827,689 APaul Wurth S. A. · 1989
- Work facilitating apparatus for conveying building material from a higher to a lower level32US 4,303,363 ACervinter AB · 1981
- Work-facilitating apparatus for lining converters, metallurgical furnaces, holding vessels and like equipment31US 4,033,463 ACervinter AB · 1977
- Apparatus for lining the inner wall of a vessel with bricks31US 4,708,562 AArbed S.A. · 1987