C23C 22/52
Treatment of copper or alloys based thereon
C23C22/52 (Treatment of copper or alloys based thereon) appears on 105 US grants and 92 published applications in this corpus.
Search patents in C23C- Granted patents
- 105
- Published applications
- 92
- Assignees
- 70
- Inventors
- 275
- Latest grant
- 16 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 1 |
| 2002 | 6 | 5 |
| 2003 | 4 | 5 |
| 2004 | 6 | 6 |
| 2005 | 1 | 4 |
| 2006 | 3 | 4 |
| 2007 | 3 | 4 |
| 2008 | 2 | 3 |
| 2009 | 1 | 1 |
| 2010 | 4 | 4 |
| 2011 | 0 | 1 |
| 2012 | 3 | 3 |
| 2013 | 4 | 2 |
| 2014 | 1 | 6 |
| 2015 | 4 | 0 |
| 2016 | 3 | 2 |
| 2017 | 1 | 4 |
| 2018 | 0 | 5 |
| 2019 | 4 | 1 |
| 2020 | 3 | 8 |
| 2021 | 5 | 5 |
| 2022 | 1 | 5 |
| 2023 | 4 | 3 |
| 2024 | 3 | 2 |
| 2025 | 6 | 7 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aqueous surface treatment agent and surface-treated metal16 Dec 2025US 12,497,700 B2Nippon Paint Surf Chemicals Co., Ltd.
- Laminate, metal plating solution, and manufacturing process of laminate29 Jul 2025US 12,371,792 B2Hitachi, Ltd.
- Ceramic-cladded copper plate and method for manufacturing ceramic-cladded copper plate22 Apr 2025US 12,284,766 B2BYD Company Limited
- Patinated or patina-ready metal transaction cards and manufacturing processes28 Jan 2025US 12,208,599 B2CompoSecure, LLC
- Acid zinc sulfate metal pretreatment7 Jan 2025US 12,188,130 B2Freiborne Industries, Inc.
- Chemical conversion coating solution, method for coloring metal element, metal element, and slide fastener23 Jul 2026US 2026/0209947 A1YKK Corporation
- Organic film and method for producing same23 Oct 2025US 2025/0331107 A1Shikoku Chemicals Corporation
- Metal surface treatment liquid21 Aug 2025US 2025/0263580 A1Shikoku Chemicals Corporation
- Aqueous surface treatment agent and surface-treated metal21 Aug 2025US 2025/0263842 A1Nippon Paint Surf Chemicals Co., Ltd.
- Preparation method and use of surface-enhanced raman spectroscopy (sers) substrate with self-confined nanosilver gaps31 Jul 2025US 2025/0244244 A1Jinan Customs Technology Center
Most cited
By later US patents
- Process for producing chalcogenide semiconductors95US 4,642,140 AThe United States of America as represented by the United States Department of Energy · 1987
- Process for improving the adhesion of polymeric materials to metal surfaces90US 5,869,130 AMac Dermid, Incorporated · 1999
- Copper coating of printed circuit boards61US 5,800,859 A1998
- Composition for treating copper or copper alloy surfaces54US 5,532,094 AMec Company Ltd. · 1996
- Method of increasing corrosion resistance of metals and alloys by treatment with rare earth elements21US 6,068,711 AMcMaster University · 2000