C21C 5/35
Blowing from above and through the bath
C21C5/35 (Blowing from above and through the bath) appears on 137 US grants and 52 published applications in this corpus.
Search patents in C21C- Granted patents
- 137
- Published applications
- 52
- Assignees
- 73
- Inventors
- 404
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 12 | 0 |
| 1983 | 16 | 0 |
| 1984 | 13 | 0 |
| 1985 | 7 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 9 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 6 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 3 |
| 2010 | 2 | 1 |
| 2011 | 3 | 3 |
| 2012 | 0 | 0 |
| 2013 | 2 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 7 |
| 2016 | 0 | 0 |
| 2017 | 3 | 2 |
| 2018 | 2 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 2 | 2 |
| 2022 | 0 | 9 |
| 2023 | 1 | 4 |
| 2024 | 1 | 6 |
| 2025 | 1 | 3 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production9 Jun 2026US 12,649,959 B2Carbon Technology Holdings, LLC
- Refining process control device and refining process control method7 Apr 2026US 12,595,523 B2Jfe Steel Corporation
- Molten iron dephosphorization method24 Mar 2026US 12,584,183 B2Jfe Steel Corporation
- Blowing control method for maintaining mushroom head of bottom-blowing nozzle converter10 Mar 2026US 12,571,061 B2Soochow University
- Process for producing raw steel and aggregate for production thereof10 Mar 2026US 12,571,062 B2ThyssenKrupp Steel Europe AG
- Molten iron dephosphorization method2 Jul 2026US 2026/0185173 A1Jfe Steel Corporation
- Refractory gas purging plug4 Jun 2026US 2026/0151827 A1Refractory Intellectual Property GmbH & Co.KG
- Refractory gas purging plug and method for controlling the conduction of gas to a refractory gas purging plug14 May 2026US 2026/0132988 A1Refractory Intellectual Property GmbH & Co.KG
- Method for predicting slopping in converter, method for operating converter, and system for predicting slopping in converter25 Sep 2025US 2025/0297335 A1Jfe Steel Corporation
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production12 Jun 2025US 2025/0188565 A1
Most cited
By later US patents
- Apparatus and method for submerged injection of a feed composition into a molten metal bath151US 5,443,572 AMolten Metal Technology, Inc. · 1995
- Metal refining method and apparatus33US 4,089,677 ABritish Steel Corporation · 1978
- Process for refining pig iron32US 3,953,199 AVereinigte Osterreichische Eisenund Stahlwerke · 1976
- Direct smelting process30US 6,602,321 B2Technological Resources Pty. Limited · 2003
- Process for producing stainless steels26US 4,178,173 AFried. Krupp Huttenwerke AG · 1979