C23G 1/36
Regeneration of waste pickling liquors
C23G1/36 (Regeneration of waste pickling liquors) appears on 227 US grants and 98 published applications in this corpus.
Search patents in C23G- Granted patents
- 227
- Published applications
- 98
- Assignees
- 155
- Inventors
- 473
- Latest grant
- 18 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 5 | 0 |
| 1978 | 8 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 3 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 5 | 0 |
| 1987 | 3 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 8 | 0 |
| 1991 | 8 | 0 |
| 1992 | 8 | 0 |
| 1993 | 10 | 0 |
| 1994 | 8 | 0 |
| 1995 | 9 | 0 |
| 1996 | 9 | 0 |
| 1997 | 5 | 0 |
| 1998 | 15 | 0 |
| 1999 | 8 | 0 |
| 2000 | 5 | 0 |
| 2001 | 9 | 3 |
| 2002 | 9 | 9 |
| 2003 | 2 | 5 |
| 2004 | 7 | 6 |
| 2005 | 5 | 5 |
| 2006 | 3 | 7 |
| 2007 | 2 | 2 |
| 2008 | 2 | 1 |
| 2009 | 2 | 4 |
| 2010 | 1 | 1 |
| 2011 | 0 | 4 |
| 2012 | 1 | 2 |
| 2013 | 2 | 6 |
| 2014 | 5 | 8 |
| 2015 | 2 | 2 |
| 2016 | 5 | 5 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 2 | 2 |
| 2020 | 3 | 3 |
| 2021 | 0 | 4 |
| 2022 | 2 | 4 |
| 2023 | 0 | 5 |
| 2024 | 3 | 5 |
| 2025 | 1 | 2 |
| 2026 | 4 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Solvent free copper extraction18 Aug 2026US 12,709,784 B2GreenSource Fabrication LLC
- Method of chemically cleaning pipework systems12 May 2026US 12,624,459 B2
- Cleaning plant for metal products14 Apr 2026US 12,601,065 B2Danieli & C. Officine Meccaniche SpA
- Method for recovering chromium contained in a bath for pickling metallic materials and facility for implementing same17 Feb 2026US 12,553,109 B2Aperam
- Acidic treatment liquid processing apparatus, acidic treatment liquid processing method, surface treatment system, and surface treatment method29 Jul 2025US 12,371,799 B2Mitsubishi Heavy Industries, Ltd.
- Process for regenerating chemical milling solutions6 Nov 2025US 2025/0340998 A1Green Etching S.R.L.
- Solvent free copper extraction3 Jul 2025US 2025/0220820 A1GreenSource Fabrication LLC
- Cleaning plant for metal products14 Nov 2024US 2024/0376609 A1Danieli & C. Officine Meccaniche SpA
- Method of removing lead materials to regenerate anode for manufacturing copper foil11 Jul 2024US 2024/0229274 A9Wesco Electrode Co., Ltd.
- Inline silicon deposition in a pickling plant20 Jun 2024US 2024/0200202 A1Primetals Technologies Austria GmbH
Most cited
By later US patents
- Cleaning compositions63US 5,977,040 AToshiba Silicone Co., Ltd. · 1999
- Cleaning compositions60US 5,985,810 AToshiba Silicone Co., Ltd. · 1999
- Cleaning compositions57US 6,136,766 AToshiba Silicone Co., Ltd. · 2000
- Method and apparatus for closed loop recycling of contaminated cleaning solution53US 5,593,598 A1997
- Cleaning compositions50US 5,443,747 AKabushiki Kaisha Toshiba · 1995