C21C 7/072
Treatment with gases
Official title: Treatment with gases (C21C7/06, C21C7/064, C21C7/068 take precedence)
C21C7/072 (Treatment with gases) appears on 168 US grants and 143 published applications in this corpus.
Search patents in C21C- Granted patents
- 168
- Published applications
- 143
- Assignees
- 115
- Inventors
- 562
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 7 | 0 |
| 1984 | 2 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 2 |
| 2004 | 4 | 9 |
| 2005 | 4 | 8 |
| 2006 | 0 | 5 |
| 2007 | 3 | 1 |
| 2008 | 0 | 5 |
| 2009 | 3 | 6 |
| 2010 | 3 | 6 |
| 2011 | 5 | 5 |
| 2012 | 6 | 2 |
| 2013 | 4 | 2 |
| 2014 | 3 | 4 |
| 2015 | 2 | 7 |
| 2016 | 2 | 5 |
| 2017 | 6 | 5 |
| 2018 | 3 | 2 |
| 2019 | 3 | 4 |
| 2020 | 5 | 7 |
| 2021 | 2 | 5 |
| 2022 | 3 | 8 |
| 2023 | 5 | 10 |
| 2024 | 6 | 20 |
| 2025 | 7 | 8 |
| 2026 | 6 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Converter steelmaking method23 Jun 2026US 12,662,712 B2Jfe Steel Corporation
- Ultra-high phosphorus molten iron low-cost smelting method for polar steel21 Apr 2026US 12,606,877 B2Laiwu Steel Yinshan Section Co., Ltd.
- Method for removing phosphorus from phosphorus-containing substance, method for manufacturing raw material for metal smelting or raw material for metal refining, and method for manufacturing metal24 Mar 2026US 12,584,187 B2Jfe Steel Corporation
- Process for producing raw steel and aggregate for production thereof10 Mar 2026US 12,571,062 B2ThyssenKrupp Steel Europe AG
- Fatigue-resistant load-bearing steel for wind turbine main shaft, and manufacturing method and use thereof17 Feb 2026US 12,553,098 B2Zenkung Heavy Industry (Jiangsu) Co., Ltd.
- Apparatus and method for refining liquid metal24 Sep 2026US 2026/0284739 A1Danieli & C. Officine Meccaniche SpA
- Fe-cr-ni alloys with excellent surface properties and their production methods7 May 2026US 2026/0125781 A1Nippon Yakin Kogyo Co., Ltd.
- Method of smelting steel and method of producing steel30 Apr 2026US 2026/0117332 A1Jfe Steel Corporation
- System and a method for producing green steel with near zero ghg emissions intensity23 Apr 2026US 2026/0110043 A1Saarloha Advanced Materials Private Limited
- Method for denitrifying molten steel5 Feb 2026US 2026/0035759 A1Jfe Steel Corporation
Most cited
By later US patents
- Melting metal particles and dispersing gas with vaned impeller135US 5,143,357 AThe Carborundum Company · 1992
- Dispersing gas into molten metal131US 4,954,167 A1990
- Dispersing gas into molten metal130US 4,898,367 AStemcor Corporation · 1990
- Melting metal particles and dispersing gas and additives with vaned impeller127US 5,310,412 AMetaullics Systems Co., L.P. · 1994
- Molten metal degassing device and impellers therefor121US 6,689,310 B12004