C21C 2100/00
Exhaust gas
C21C2100/00 (Exhaust gas) appears on 62 US grants and 104 published applications in this corpus.
Search patents in C21C- Granted patents
- 62
- Published applications
- 104
- Assignees
- 60
- Inventors
- 226
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 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 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 10 |
| 2010 | 0 | 9 |
| 2011 | 3 | 9 |
| 2012 | 6 | 16 |
| 2013 | 7 | 7 |
| 2014 | 5 | 6 |
| 2015 | 7 | 6 |
| 2016 | 4 | 2 |
| 2017 | 5 | 2 |
| 2018 | 4 | 2 |
| 2019 | 2 | 0 |
| 2020 | 2 | 2 |
| 2021 | 0 | 1 |
| 2022 | 2 | 4 |
| 2023 | 1 | 7 |
| 2024 | 2 | 9 |
| 2025 | 7 | 9 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Blast furnace—converter steel production method based on carbon cycling28 Jul 2026US 12,692,561 B2Cisdi Engineering Co., Ltd
- Steel making plant with electric arc furnace21 Apr 2026US 12,607,409 B2SMS group GmbH
- Process and plant for preheating a metal charge fed in continuous to an electric melting furnace15 Jul 2025US 12,359,873 B2
- Systems and methods for self-reduction of iron ore18 Mar 2025US 12,252,753 B2Charm Industrial, Inc.
- Method and device for producing direct reduced metal18 Feb 2025US 12,227,820 B2Greeniron H2 AB
- Systematic carbon emissions reduction method for whole process of production and casting3 Sep 2026US 2026/0258513 A1Jiqing Low Carbon Technology (Qinhuangdao) Co., Ltd.
- Blast Furnace - Converter Steel Production Method Based on Carbon Cycling12 Feb 2026US 2026/0043097 A1Cisdi Engineering Co., Ltd
- Metallurgical plant and method28 Aug 2025US 2025/0271216 A1Danieli & C. Officine Meccaniche SpA
- Ruhrstahl-heraeus snorkel design21 Aug 2025US 2025/0263808 A1HarbisonWalker International Holdings, Inc.
- Process for reducing fossil co2 emissions17 Jul 2025US 2025/0229224 A1Paul Wurth S. A.
Most cited
By later US patents
- Blast furnace iron production with integrated power generation70US 8,133,298 B2Air Products and Chemicals, Inc. · 2012
- Methods for treating an offgas containing carbon oxides10US 9,475,699 B2Seerstone LLC · 2016
- Method and apparatus for coproduction of pig iron and high quality syngas8US 8,764,875 B22014
- Pre-treatment process for feed material for direct reduction process7US 7,175,690 B2Rio Tinto Brasil · 2007
- Process and plant for producing hot metal4US 8,926,728 B2Outotec Oyj · 2015