C22B 15/0021
By reducing in gaseous or solid state
Official title: {by reducing in gaseous or solid state (slag reduction C22B15/0054)}
C22B15/0021 (By reducing in gaseous or solid state) appears on 22 US grants and 11 published applications in this corpus.
Search patents in C22B- Granted patents
- 22
- Published applications
- 11
- Assignees
- 14
- Inventors
- 60
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 2 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 2 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 4 |
| 2023 | 1 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for recovering valuable materials from batteries7 Jul 2026US 12,676,351 B2University of Kentucky Research Foundation
- Method for producing copper metal from copper concentrates without generating waste26 May 2026US 12,637,738 B2Universidad De Concepcion
- Bio-reduction of metal ores integrated with biomass pyrolysis6 May 2025US 12,291,760 B2Carbon Technology Holdings, LLC
- Opportunities for recovery augmentation process as applied to molybdenum production22 Oct 2024US 12,123,075 B2Cidra Corporate Services Inc.
- Bio-reduction of metal ores integrated with biomass pyrolysis12 Sep 2023US 11,753,698 B2Carbon Technology Holdings, LLC
- Process and device for producing copper composite material4 Jun 2026US 2026/0155470 A1BASF SE
- Method for recovering valuable materials from batteries23 Jan 2025US 2025/0030074 A1University of Kentucky Research Foundation
- Method for producing copper metal from copper concentrates without generating waste15 Dec 2022US 2022/0396851 A1Universidad De Concepcion
- Bio-reduction of metal ores integrated with biomass pyrolysis31 Mar 2022US 2022/0098685 A1Carbon Technology Holdings, LLC
- Bio-reduction of metal ores integrated with biomass pyrolysis31 Mar 2022US 2022/0098700 A1Carbon Technology Holdings, LLC
Most cited
By later US patents
- Bio-reduction of metal ores integrated with biomass pyrolysis29US 11,753,698 B2Carbon Technology Holdings, LLC · 2023
- Method for direct metal making by microwave energy25US 6,277,168 B12001
- Production of copper and sulfur from copper-iron sulfides15US 3,964,901 ACominco Ltd. · 1976
- Process for recovering metals from solution through solvent extraction and pyrometallurgical reduction13US 4,561,887 ASociedad Minera Pudahuel Ltda., C.P.A. · 1985
- Fluidized hydrogen reduction process for the recovery of copper11US 4,039,324 ACyprus Metallurgical Processes Corporation · 1977