C25C 1/18
Electrolytic production, recovery or refining of metals by electrolysis of solutions: of
Official title: of lead
C25C1/18 (Electrolytic production, recovery or refining of metals by electrolysis of solutions: of) appears on 88 US grants and 57 published applications in this corpus.
Search patents in C25C- Granted patents
- 88
- Published applications
- 57
- Assignees
- 63
- Inventors
- 209
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 1 | 3 |
| 2015 | 2 | 0 |
| 2016 | 3 | 2 |
| 2017 | 3 | 6 |
| 2018 | 2 | 5 |
| 2019 | 4 | 8 |
| 2020 | 7 | 2 |
| 2021 | 6 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 4 |
| 2024 | 0 | 8 |
| 2025 | 1 | 4 |
| 2026 | 3 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Systems and methods for direct oxide production29 Sep 2026US 12,747,511 B2Aqua Metals Inc.
- Electrolyzer with horizontal cathode29 Sep 2026US 12,747,512 B2Verdeen Chemicals Inc.
- Bipolar electrolyzer22 Sep 2026US 12,742,251 B2Verdeen Chemicals Inc.
- Sulfonate electroplating bath, process for refining metal by electrolytic depositing and process for controlling metal morphology in electrolytic refining30 Dec 2025US 12,509,789 B2BASF SE
- Systems and methods for aqueous recovery of lead from lead acid batteries with reduced electrolyte demand25 Jul 2023US 11,708,640 B2Aqua Metals Inc.
- Electrolytic extraction of elemental metal from metal compounds25 Sep 2025US 2025/0297395 A1Verdeen Chemicals Inc.
- Electrolyzer with horizontal cathode17 Apr 2025US 2025/0122637 A1Verdeen Chemicals Inc.
- Systems And Methods For Direct Oxide Production6 Mar 2025US 2025/0075357 A1Aqua Metals Inc.
- Methods and systems of controlling bidirectional operation of an electrowinning plant9 Jan 2025US 2025/0011959 A1Form Energy, Inc.
- Method for removing halide from waelz oxide7 Nov 2024US 2024/0368729 A1Korea Zinc Co., Ltd.
Most cited
By later US patents
- Electrolytic method for regenerating tin or tin-lead alloy stripping compositions38US 4,944,851 AMacDermid, Incorporated · 1990
- Method of recovering lead values from battery sludge28US 4,229,271 ARSR Limited · 1980
- Process for recovery of metal values from lead-zinc ores, even those having a high carbonate content26US 4,272,341 ADuval Corporation · 1981
- Process for the recovery of metallic lead from battery paste25US 5,514,263 AH. J. Enthoven Limited · 1996
- Critical solvent separations in inorganic systems24US 4,457,812 AKerr-McGee Chemical Corporation · 1984