C21B 9/12
Hot-blast valves or slides for blast furnaces
C21B9/12 (Hot-blast valves or slides for blast furnaces) appears on 19 US grants and 3 published applications in this corpus.
Search patents in C21B- Granted patents
- 19
- Published applications
- 3
- Assignees
- 14
- Inventors
- 26
- Latest grant
- 27 Jan 2015
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 2 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Arrangement for burning blast furnace off-gas from a bleeder valve and corresponding bleeder valve27 Jan 2015US 8,940,226 B2Paul Wurth S. A.
- Method for feeding hot gas to a shaft furnace8 Oct 2013US 8,550,811 B2Paul Wurth S. A.
- Bleeder valve for pressurized furnace11 Oct 2011US 8,034,284 B2Paul Wurth S. A.
- Cooled slider plate, particularly a water-cooled hot air slider plate9 Jul 2002US 6,415,811 B1Zimmermann & Jansen GmbH
- Valve system9 Jun 1998US 5,762,099 AIscor Limited
- Arrangement for burning blast furnace off-gas from a bleeder valve and corresponding bleeder valve8 Mar 2012US 2012/0055382 A1Paul Wurth S. A.
- Method for feeding hot gas to a shaft furnace12 Jan 2012US 2012/0009534 A1Paul Wurth S. A.
- Bleeder valve for pressurized furnace12 Aug 2010US 2010/0201051 A1Paul Wurth S. A.
Most cited
By later US patents
- Valve system and improved actuator therefor15US 4,158,367 AS. A. des Anciens Etablissements Paul Wurth · 1979
- Shut-off valve for interrupting a flow of a fluid through a pipeline9US 4,337,789 AHermann Rappold & Co. GmbH · 1982
- Ventilated poppet damper8US 4,103,708 AAmerican Air Filter Company, Inc. · 1978
- Slide valve for closing a large pressurized gas conveying pipe7US 4,018,420 AHermann Rappold & Co. GmbH · 1977
- Fail-closed, tight seal gas safety valve system7US 4,553,731 ABethlehem Steel Corporation · 1985