C22B 13/02
Obtaining lead: by dry processes
Official title: by dry processes
C22B13/02 (Obtaining lead: by dry processes) appears on 182 US grants and 77 published applications in this corpus.
Search patents in C22B- Granted patents
- 182
- Published applications
- 77
- Assignees
- 137
- Inventors
- 404
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 6 | 0 |
| 1978 | 8 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 5 | 0 |
| 1985 | 9 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 6 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 7 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 2 |
| 2009 | 2 | 2 |
| 2010 | 2 | 6 |
| 2011 | 3 | 3 |
| 2012 | 4 | 4 |
| 2013 | 4 | 0 |
| 2014 | 0 | 3 |
| 2015 | 2 | 2 |
| 2016 | 3 | 7 |
| 2017 | 5 | 2 |
| 2018 | 2 | 6 |
| 2019 | 2 | 2 |
| 2020 | 5 | 4 |
| 2021 | 2 | 7 |
| 2022 | 3 | 6 |
| 2023 | 6 | 3 |
| 2024 | 5 | 4 |
| 2025 | 5 | 2 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method, apparatus and system for processing a composite waste source26 May 2026US 12,637,737 B2NewSouth Innovations Pty Limited
- Molten lead scrap submergence apparatus11 Nov 2025US 12,467,118 B2Pyrotek, Inc.
- Metal recovery process12 Aug 2025US 12,385,106 B2Minex Technology Group Limited
- Method and apparatus for recovering copper, bronze and lead from mixture of copper oxide, tin oxide and lead oxide18 Feb 2025US 12,227,819 B2Pukyong National University Industry-University Cooperation Foundation
- Method for removing arsenic from copper smelting soot and comprehensive recovery of valuable metals4 Feb 2025US 12,215,406 B1Shandong Humon Smelting Co., Ltd.
- Method for fire refining of complex crude lead21 May 2026US 2026/0139341 A1Kunming University of Science and Technology
- Lead-recovery process30 Apr 2026US 2026/0117341 A1
- Spent and/or decommissioned lead-acid accumulator treatment plants and/or processes19 Feb 2026US 2026/0049373 A1Engitec Technologies S.P.A.
- Process for heavy metal removal from iron- and steelmaking flue dust12 Feb 2026US 2026/0043110 A1Tata Steel Ijmuiden B.V.
- Spent and/or decommissioned lead-acid accumulator treatment plants and/or processes25 Dec 2025US 2025/0391945 A1Engitec Technologies S.P.A.
Most cited
By later US patents
- Extraction of trace metals from fly ash43US 4,475,993 AThe United States of America as represented by the United States Department of Energy · 1984
- Process for remediation of lead-contaminated soil and waste battery33US 5,284,503 AExide Corporation · 1994
- Process for recovering lead oxides from exhausted batteries33US 7,507,496 B1Kinsbursky Brothers Inc · 2009
- Method for processing oxidic materials in metallurgical waste30US 4,802,919 AWestinghouse Electric Corp. · 1989
- Process for recovery of selected metal values from waste waters26US 4,033,763 AWorld Resources Company · 1977