C21B 7/163
Blowpipe assembly
Official title: {Blowpipe assembly}
C21B7/163 (Blowpipe assembly) appears on 53 US grants and 61 published applications in this corpus.
Search patents in C21B- Granted patents
- 53
- Published applications
- 61
- Assignees
- 42
- Inventors
- 151
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 0 |
| 2007 | 0 | 3 |
| 2008 | 0 | 4 |
| 2009 | 1 | 0 |
| 2010 | 1 | 1 |
| 2011 | 2 | 6 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 4 | 3 |
| 2015 | 5 | 12 |
| 2016 | 3 | 5 |
| 2017 | 2 | 2 |
| 2018 | 6 | 4 |
| 2019 | 3 | 0 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 3 |
| 2023 | 0 | 4 |
| 2024 | 0 | 0 |
| 2025 | 3 | 2 |
| 2026 | 0 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Reducing gas injection system23 Dec 2025US 12,504,233 B2Paul Wurth S. A.
- Tuyere stock, method of fabricating the same, and air blast system for melting furnace6 May 2025US 12,291,756 B2Excello Co., Ltd.
- Method of heating up furnace bottom, and burner lance used in the method25 Mar 2025US 12,259,184 B2Jfe Steel Corporation
- Retractable nozzle for refractory-lined equipment28 Jun 2022US 11,369,986 B2ExxonMobil Technology and Engineering Company
- Fluid assisted particle injector22 Dec 2020US 10,870,899 B2Berry Metal Company
- Tuyere for a metallurgical furnace1 Oct 2026US 2026/0297694 A1Paul Wurth S. A.
- Method for operating a smelting furnace installation28 May 2026US 2026/0146300 A1Paul Wurth S. A.
- Iron ore reducing and melting apparatus and method19 Mar 2026US 2026/0078456 A1Paul Wurth S.A.
- Method for operating a smelting furnace installation12 Feb 2026US 2026/0043099 A1Paul Wurth S. A.
- Tuyere sleeve for hydrogen-enriched carbonic oxide recycling oxygenate furnace and controlling method therefor29 Jan 2026US 2026/0029196 A1Xinjiang Bayi Iron & Steel Co., Ltd.
Most cited
By later US patents
- Improved tuyere feed device13US 4,027,605 AS. A. des Anciens Etablissements Paul Wurth · 1977
- Apparatus for the transmission of heated fluid12US 4,023,832 AS. A. des Anciens Etablissements Paul Wurth · 1977
- Device for assembling in particular two sections of a blast downpipe of a blast furnace12US 4,191,410 AUnion Siderurgique du Nord et de l'Est de la France · 1980
- Method of controlling a mobile suction device for sucking suspendible material from the bottom of a liquid body, and an apparatus for carrying out the method6US 4,037,335 AIngenjorsfirman N.A. Sandbergs Industrikonstruktioner AB · 1977
- Device for injecting preheated air into a shaft furnace6US 4,987,838 APaul Wurth S. A. · 1991