C23C 2222/10
Use of solutions containing trivalent chromium but free of hexavalent chromium
C23C2222/10 (Use of solutions containing trivalent chromium but free of hexavalent chromium) appears on 200 US grants and 273 published applications in this corpus.
Search patents in C23C- Granted patents
- 200
- Published applications
- 273
- Assignees
- 120
- Inventors
- 553
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 2 |
| 2002 | 3 | 6 |
| 2003 | 7 | 9 |
| 2004 | 6 | 11 |
| 2005 | 6 | 8 |
| 2006 | 7 | 11 |
| 2007 | 4 | 8 |
| 2008 | 2 | 4 |
| 2009 | 3 | 13 |
| 2010 | 5 | 15 |
| 2011 | 8 | 17 |
| 2012 | 7 | 8 |
| 2013 | 9 | 9 |
| 2014 | 4 | 12 |
| 2015 | 6 | 11 |
| 2016 | 10 | 12 |
| 2017 | 7 | 12 |
| 2018 | 7 | 8 |
| 2019 | 8 | 14 |
| 2020 | 7 | 17 |
| 2021 | 5 | 15 |
| 2022 | 4 | 8 |
| 2023 | 11 | 15 |
| 2024 | 9 | 13 |
| 2025 | 18 | 9 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for coating zinc die-cast parts, multi-layered coating for the protection of zinc die-cast parts, and coated zinc die-cast part4 Aug 2026US 12,698,564 B2Fnt Co., Ltd.
- 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.
- Cr(III) based dry-in-place coating composition for zinc coated steel6 Jan 2026US 12,516,418 B2Henkel AG & Co. KGaA
- Aqueous surface treatment agent and surface-treated metal16 Dec 2025US 12,497,700 B2Nippon Paint Surf Chemicals Co., Ltd.
- Insulation coating film composition for grain-oriented electrical steel sheet, preparation method therefor, grain-oriented electrical steel sheet having an insulation coating film formed on surface thereof by using same, and manufacturing method therefor23 Jul 2026US 2026/0209120 A1Posco
- Composition for forming insulating film on electrical steel sheet, electrical steel sheet, and method for manufacturing electrical steel sheet23 Jul 2026US 2026/0209946 A1Posco
- Solution composition for surface treatment of steel sheet, steel sheet surface-treated using same, and manufacturing method therefor11 Jun 2026US 2026/0159956 A1Posco
- Compositions, systems and methods for treating a substrate4 Jun 2026US 2026/0152858 A1PRC-DeSoto International, Inc.
- Systems and methods for treating a metal substrate26 Feb 2026US 2026/0055512 A1PRC-DeSoto International, Inc.
Most cited
By later US patents
- Coating solution having trivalent chromium and manganese for coating metal surfaces38US 3,932,198 AAmchem Products, Inc. · 1976
- Coating solutions of trivalent chromium for coating zinc surfaces35US 4,171,231 AR. O. Hull & Company, Inc. · 1979
- Non-peroxide trivalent chromium passivate composition and process32US 4,578,122 AOMI International Corporation · 1986
- Trivalent chromium conversion coatings for aluminum27US 5,304,257 AThe United States of America as represented by the Secretary of the Navy · 1994
- Black chromium-containing conversion coatings on zinc-nickel and zinc-iron alloys27US 5,415,702 AMcGean-Rohco, Inc. · 1995