C21C 7/0025
Adding carbon material
Official title: {Adding carbon material}
C21C7/0025 (Adding carbon material) appears on 63 US grants and 91 published applications in this corpus.
Search patents in C21C- Granted patents
- 63
- Published applications
- 91
- Assignees
- 80
- Inventors
- 269
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 6 |
| 2005 | 2 | 1 |
| 2006 | 0 | 3 |
| 2007 | 2 | 4 |
| 2008 | 0 | 3 |
| 2009 | 2 | 1 |
| 2010 | 4 | 4 |
| 2011 | 7 | 3 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 1 | 3 |
| 2016 | 2 | 2 |
| 2017 | 0 | 6 |
| 2018 | 3 | 8 |
| 2019 | 1 | 2 |
| 2020 | 2 | 0 |
| 2021 | 3 | 3 |
| 2022 | 0 | 6 |
| 2023 | 2 | 4 |
| 2024 | 4 | 6 |
| 2025 | 5 | 8 |
| 2026 | 2 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Direct current electric arc furnace22 Sep 2026US 12,742,218 B2Masercata Oy
- Method for producing chromium-containing molten steel16 Jun 2026US 12,655,488 B2Jfe Steel Corporation
- 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.
- Process of production of a polymer product8 Apr 2025US 12,269,926 B2I.Blu S.R.L.
- Novel process for the smelting of a blend of hot and cold metalliferous feedstock material yielding reduced carbon emissions1 Oct 2026US 2026/0297695 A1Metix (Proprietary) Limited
- Novel process for the smelting of a metalliferous feedstock material yielding reduced carbon emissions1 Oct 2026US 2026/0297698 A1Metix (Proprietary) Limited
- A method for manufacturing molten pig iron into an electrical smelting furnace10 Sep 2026US 2026/0265845 A1
- Molten steel manufacturing method and arc furnace20 Aug 2026US 2026/0242884 A1Nippon Steel Corporation
- A method for manufacturing pig iron in an electrical smelting furnace and associated furnace25 Jun 2026US 2026/0176708 A1
Most cited
By later US patents
- High pressure dry coal slurry extrusion pump48US 7,717,046 B2Pratt & Whitney Rocketdyne, Inc. · 2010
- Method and apparatus for the detection of slag co-flowing within a stream of molten metal22US 4,816,758 AAMEPA Angewandte Messtechnik und Prozessautomatisierung GmbH · 1989
- Preparation of recarburizer coke22US 5,158,668 AConoco Inc. · 1992
- Pellets of graphite and carbon black and method of producing16US 4,308,073 APhillips Petroleum Company · 1981
- Method and apparatus for the acceleration of solid particles entrained in a carrier gas16US 4,603,810 AArbed S.A. · 1986