C21C 5/5264
Manufacture of alloyed steels including ferro-alloys
Official title: {Manufacture of alloyed steels including ferro-alloys}
C21C5/5264 (Manufacture of alloyed steels including ferro-alloys) appears on 73 US grants and 70 published applications in this corpus.
Search patents in C21C- Granted patents
- 73
- Published applications
- 70
- Assignees
- 80
- Inventors
- 235
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 6 |
| 2004 | 3 | 1 |
| 2005 | 1 | 2 |
| 2006 | 2 | 5 |
| 2007 | 1 | 3 |
| 2008 | 1 | 3 |
| 2009 | 0 | 2 |
| 2010 | 2 | 5 |
| 2011 | 6 | 5 |
| 2012 | 2 | 2 |
| 2013 | 2 | 3 |
| 2014 | 3 | 3 |
| 2015 | 1 | 3 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 3 |
| 2021 | 1 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 0 |
| 2024 | 1 | 2 |
| 2025 | 4 | 5 |
| 2026 | 1 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Direct current electric arc furnace22 Sep 2026US 12,742,218 B2Masercata Oy
- Method for producing chromium-containing molten iron17 Jun 2025US 12,331,368 B2Nippon Steel Corporation
- Process for producing clean steel products with a low nitrogen content using an electric arc furnace and a degassing system13 May 2025US 12,296,379 B2Ternium México, S.A. de C.V.
- Method for recycling chromium oxide and forming chromium-alloy steel4 Feb 2025US 12,215,395 B2Saudi Iron and Steel Company (Hadeed)
- System and method to sustainable integrated wastewater treatment and air-cooling in a steelmaking plant14 Jan 2025US 12,195,361 B2Saudi Arabian Oil Company
- Production and preparation method of carburized gear shaft bars by means of converter process24 Sep 2026US 2026/0286458 A1Bengang Steel Plates Co., Ltd.
- System to produce green steel through electric arc furnace with very low ghg emission intensity16 Jul 2026US 2026/0201487 A1Saarloha Advanced Materials Private Limited
- 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 manufacturing high-chromium (cr) molten steel, method for manufacturing cast piece, and method for manufacturing press roll16 Apr 2026US 2026/0103769 A1Posco
Most cited
By later US patents
- Electron-beam melt refining of ferroniobium21US 6,007,597 ATeledyne Industries, Inc. · 1999
- Metallurgical processes9US 4,575,394 A1986
- Metallurgical processes8US 4,531,973 A1985
- Method for melting ferrous scrap metal and chromite in a submerged arc furnace to produce a chromium containing iron8US 5,654,976 AElkem Technology a/s · 1997
- Process for making stainless steel7US 3,947,267 AArmco Steel Corporation · 1976