C23C 22/50
Treatment of iron or alloys based thereon
C23C22/50 (Treatment of iron or alloys based thereon) appears on 146 US grants and 182 published applications in this corpus.
Search patents in C23C- Granted patents
- 146
- Published applications
- 182
- Assignees
- 114
- Inventors
- 440
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 4 | 0 |
| 2001 | 5 | 2 |
| 2002 | 4 | 2 |
| 2003 | 6 | 4 |
| 2004 | 0 | 3 |
| 2005 | 1 | 1 |
| 2006 | 3 | 9 |
| 2007 | 0 | 3 |
| 2008 | 0 | 4 |
| 2009 | 0 | 4 |
| 2010 | 1 | 2 |
| 2011 | 4 | 12 |
| 2012 | 5 | 7 |
| 2013 | 5 | 5 |
| 2014 | 5 | 6 |
| 2015 | 7 | 6 |
| 2016 | 5 | 9 |
| 2017 | 2 | 7 |
| 2018 | 7 | 11 |
| 2019 | 13 | 11 |
| 2020 | 6 | 8 |
| 2021 | 4 | 8 |
| 2022 | 3 | 20 |
| 2023 | 6 | 12 |
| 2024 | 13 | 8 |
| 2025 | 11 | 14 |
| 2026 | 10 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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
- 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
- Stainless steel having excellent surface electrical conductivity for fuel cell separator and manufacturing method therefor4 Aug 2026US 12,700,597 B2Posco
- Ferritic stainless steel sheet for current collectors for sulfide-based solid-state batteries, and method for manufacturing same16 Jun 2026US 12,658,454 B2Jfe Steel Corporation
- Method of producing electrical steel sheet with insulating coating16 Jul 2026US 2026/0204463 A1Jfe Steel Corporation
- Solution composition for surface treatment of steel sheet, steel sheet surface-treated using same, and manufacturing method therefor11 Jun 2026US 2026/0159956 A1Posco
- Hydrothermal black oxide conversion coating process for steel components2 Apr 2026US 2026/0092376 A1GM Global Technology Operations LLC
- Conversion coating solutions and methods of use therefor22 Jan 2026US 2026/0022468 A1DuBois Chemicals, Inc.
- Stabilization treatment liquid for 690 mpa-grade weather-resistant bridge steel member, treatment method and use2 Oct 2025US 2025/0305151 A1Baoshan Iron & Steel Co., Ltd.
Most cited
By later US patents
- Method of preventing corrosion of metals using silanes78US 5,750,197 AUniversity of Cincinnati · 1998
- Passivation of stainless steels in organosulphonic acid medium32US 6,120,619 AElf Atochem S. A. · 2000
- Method of treating metals using amino silanes and multi-silyl-functional silanes in admixture29US 6,132,808 ABrent International PLC · 2000
- Corrosion inhibitor composition applicable for aluminum and steel protection and procedure27US 7,662,241 B2Wayne Pigment Corp. · 2010
- Method of preventing corrosion of metals using silanes23US 6,261,638 B1University of Cincinnati · 2001