C23C 22/53
Treatment of zinc or alloys based thereon
C23C22/53 (Treatment of zinc or alloys based thereon) appears on 166 US grants and 191 published applications in this corpus.
Search patents in C23C- Granted patents
- 166
- Published applications
- 191
- Assignees
- 107
- Inventors
- 459
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 7 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 1 |
| 2002 | 3 | 3 |
| 2003 | 4 | 8 |
| 2004 | 6 | 8 |
| 2005 | 5 | 10 |
| 2006 | 3 | 13 |
| 2007 | 2 | 8 |
| 2008 | 3 | 8 |
| 2009 | 1 | 9 |
| 2010 | 4 | 8 |
| 2011 | 6 | 16 |
| 2012 | 7 | 9 |
| 2013 | 4 | 4 |
| 2014 | 6 | 5 |
| 2015 | 9 | 11 |
| 2016 | 2 | 10 |
| 2017 | 4 | 8 |
| 2018 | 7 | 9 |
| 2019 | 7 | 9 |
| 2020 | 8 | 9 |
| 2021 | 7 | 2 |
| 2022 | 4 | 3 |
| 2023 | 6 | 6 |
| 2024 | 4 | 7 |
| 2025 | 8 | 4 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Surface modifying method for galvanized steel sheet21 Jul 2026US 12,686,909 B2Posco
- Passivation composition and method for depositing a chromium-comprising passivation layer on a zinc or zinc-nickel coated substrate7 Jul 2026US 12,674,236 B2Atotech Deutschland GmbH
- Chemical conversion treatment solution, chemical conversion treatment method in which same is used, and chemical conversion coating9 Jun 2026US 12,649,972 B2Dipsol Chemicals Co., Ltd.
- Pre-coated plated steel sheet and molded product16 Dec 2025US 12,497,519 B2Nippon Steel Corporation
- Conversion coating application system including hydrogels and methods of using same5 Aug 2025US 12,378,674 B2Chemeon Surface Technology, LLC
- Metal sheet with zinc hydroxysulfate/zinc sulfate-based protection layer17 Sep 2026US 2026/0275562 A1
- Complexing agent and potassium chloride-based zinc-iron alloy plating solution containing the same, and zinc-iron electroplating method2 Jul 2026US 2026/0185257 A1Guangzhou Ultra Union Chemicals Ltd
- Solution composition for surface treatment of steel sheet, steel sheet surface-treated using same, and manufacturing method therefor11 Jun 2026US 2026/0159956 A1Posco
- Conversion coating application system including hydrogels and methods of using same23 Oct 2025US 2025/0327186 A1Chemeon Surface Technology, LLC
- Conversion coating application system including hydrogels and methods of using same23 Oct 2025US 2025/0327187 A1Chemeon Surface Technology, LLC
Most cited
By later US patents
- Coating solution having trivalent chromium and manganese for coating metal surfaces38US 3,932,198 AAmchem Products, Inc. · 1976
- Chromium-free black zinc-nickel alloy surfaces37US 5,393,353 AMcGean-Rohco, Inc. · 1995
- Non-peroxide trivalent chromium passivate composition and process32US 4,578,122 AOMI International Corporation · 1986
- Method of treating metals using amino silanes and multi-silyl-functional silanes in admixture29US 6,132,808 ABrent International PLC · 2000
- Trivalent chromium passivate solution and process25US 4,349,392 AOccidental Chemical Corporation · 1982