C22B 3/08
Sulfuric acid , other sulfurated acids or salts thereof
Official title: Sulfuric acid {, other sulfurated acids or salts thereof}
C22B3/08 (Sulfuric acid , other sulfurated acids or salts thereof) appears on 443 US grants and 625 published applications in this corpus.
Search patents in C22B- Granted patents
- 443
- Published applications
- 625
- Assignees
- 384
- Inventors
- 1,471
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 8 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 5 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 3 |
| 2002 | 10 | 8 |
| 2003 | 4 | 3 |
| 2004 | 3 | 13 |
| 2005 | 3 | 6 |
| 2006 | 3 | 8 |
| 2007 | 2 | 12 |
| 2008 | 2 | 9 |
| 2009 | 12 | 11 |
| 2010 | 10 | 13 |
| 2011 | 10 | 14 |
| 2012 | 9 | 7 |
| 2013 | 5 | 10 |
| 2014 | 7 | 7 |
| 2015 | 6 | 22 |
| 2016 | 13 | 26 |
| 2017 | 9 | 22 |
| 2018 | 18 | 24 |
| 2019 | 22 | 18 |
| 2020 | 28 | 33 |
| 2021 | 20 | 29 |
| 2022 | 15 | 29 |
| 2023 | 23 | 60 |
| 2024 | 45 | 75 |
| 2025 | 44 | 89 |
| 2026 | 25 | 74 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Integration of carbon sequestration with selective hydrometallurgical recovery of metal values22 Sep 2026US 12,742,226 B2Negative Emissions Materials, Inc.
- Binder for an agglomeration process8 Sep 2026US 12,729,161 B2Mintek
- Method for extracting metals from saprolite laterite nickel ore1 Sep 2026US 12,723,318 B2Gem Co., Ltd.
- Compositions and systems for selective lithium leaching and related methods18 Aug 2026US 12,709,785 B2American Battery Technology Company
- Process for producing lithium salts16 Jun 2026US 12,655,498 B2Tenova Advanced Technologies Ltd.
- Process for the extraction of a by-product metal from a mineral concentrate8 Oct 2026US 2026/0308710 A1
- Method of recovery of scandium8 Oct 2026US 2026/0308716 A1Nippon Steel Corporation
- Recovery of li-salts from ores10 Sep 2026US 2026/0265071 A1Adionics
- Methods employing thiourea for metal extraction10 Sep 2026US 2026/0265857 A1Rzolv Technologies Inc.
- Heap leaching of copper sulphide ores10 Sep 2026US 2026/0265862 A1Mintek
Most cited
By later US patents
- Recovery of gold from refractory auriferous iron-containing sulphidic ore55US 4,571,264 ASherritt Gordon Mines Limited · 1986
- Oxidation/reduction process for recovery of precious metals from MnO.sub.2 ores, sulfidic ores and carbonaceous materials54US 5,232,490 ALeadville Silver and Gold · 1993
- Chloride assisted hydrometallurgical copper extraction52US 5,431,788 ACominco Engineering Services Ltd. · 1995
- Hydrometallurgical process for the recovery of precious metal values from precious metal ores with thiosulfate lixiviant51US 5,354,359 ANewmont Gold Company · 1994
- Method for thiosulfate leaching of precious metal-containing materials49US 6,660,059 B2Placer Dome Technical Services Limited · 2003