C23C 22/48
Not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates
Official title: not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
C23C22/48 (Not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates) appears on 587 US grants and 634 published applications in this corpus.
Search patents in C23C- Granted patents
- 587
- Published applications
- 634
- Assignees
- 363
- Inventors
- 1,615
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 7 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 8 | 0 |
| 1983 | 3 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 7 | 0 |
| 1994 | 15 | 0 |
| 1995 | 13 | 0 |
| 1996 | 9 | 0 |
| 1997 | 2 | 0 |
| 1998 | 11 | 0 |
| 1999 | 8 | 0 |
| 2000 | 16 | 0 |
| 2001 | 17 | 3 |
| 2002 | 17 | 13 |
| 2003 | 15 | 27 |
| 2004 | 17 | 27 |
| 2005 | 10 | 21 |
| 2006 | 13 | 21 |
| 2007 | 9 | 16 |
| 2008 | 11 | 14 |
| 2009 | 2 | 19 |
| 2010 | 9 | 21 |
| 2011 | 9 | 28 |
| 2012 | 18 | 25 |
| 2013 | 18 | 17 |
| 2014 | 16 | 22 |
| 2015 | 25 | 31 |
| 2016 | 17 | 26 |
| 2017 | 10 | 20 |
| 2018 | 20 | 32 |
| 2019 | 27 | 35 |
| 2020 | 22 | 37 |
| 2021 | 22 | 27 |
| 2022 | 13 | 44 |
| 2023 | 22 | 37 |
| 2024 | 26 | 27 |
| 2025 | 36 | 28 |
| 2026 | 19 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C23C 22/56Treatment of aluminium or alloys based thereon171
- C23C 22/53Treatment of zinc or alloys based thereon166
- C23C 22/50Treatment of iron or alloys based thereon146
- C23C 22/52Treatment of copper or alloys based thereon105
- C23C 22/57Treatment of magnesium or alloys based thereon38
- C23C 22/58Treatment of other metallic material35
- C23C 22/54Treatment of refractory metals or alloys based thereon9
Recent patents
- Continuous coil pretreatment process6 Oct 2026US 12,753,515 B2Arconic Technologies LLC
- System and method of coating an automotive part with iron oxide for an electric drive unit of a vehicle29 Sep 2026US 12,747,506 B2GM Global Technology Operations LLC
- Process for wet-chemical formation of a stable tin oxide layer for printed circuit boards25 Aug 2026US 12,716,133 B2Atotech Deutschland GmbH
- Grain-oriented electrical steel sheet and manufacturing method therefor25 Aug 2026US 12,716,134 B2Nippon Steel Corporation
- Stainless steel for separation plate of polymer electrolyte membrane fuel cell having improved hydrophilic property and corrosion resistance, and manufacturing method therefor25 Aug 2026US 12,719,063 B2Posco
- Continuous coil pretreatment process8 Oct 2026US 2026/0308766 A1Arconic Technologies LLC
- Metal sheet with zinc hydroxysulfate/zinc sulfate-based protection layer17 Sep 2026US 2026/0275562 A1
- Chemical conversion coating solution, method for coloring metal element, metal element, and slide fastener23 Jul 2026US 2026/0209947 A1YKK Corporation
- Aluminum Material or Aluminum Alloy Material Provided With Coating Film, Method for Producing Same, and Aqueous Surface Treatment Agent16 Jul 2026US 2026/0201563 A1Nihon Parkerizing Co., Ltd.
- Methods for silanization of substrates16 Jul 2026US 2026/0201564 A1Medtronic, Inc.
Most cited
By later US patents
- Generation of compact alumina passivation layers on aluminum plasma equipment components108US 9,903,020 B2APPLIED Materials.Inc. · 2018
- Conditioned semiconductor system parts107US 9,885,117 B2APPLIED Materials.Inc. · 2018
- 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
- Method of preventing corrosion of metals using silanes78US 5,750,197 AUniversity of Cincinnati · 1998