C23C 8/56
Of ferrous surfaces
Official title: of ferrous surfaces
C23C8/56 (Of ferrous surfaces) appears on 28 US grants and 39 published applications in this corpus.
Search patents in C23C- Granted patents
- 28
- Published applications
- 39
- Assignees
- 28
- Inventors
- 93
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 3 |
| 2012 | 1 | 1 |
| 2013 | 2 | 3 |
| 2014 | 2 | 2 |
| 2015 | 1 | 7 |
| 2016 | 2 | 0 |
| 2017 | 4 | 2 |
| 2018 | 2 | 4 |
| 2019 | 0 | 2 |
| 2020 | 3 | 1 |
| 2021 | 1 | 3 |
| 2022 | 1 | 2 |
| 2023 | 0 | 2 |
| 2024 | 2 | 1 |
| 2025 | 2 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processing method and processing apparatus for metal component19 May 2026US 12,630,914 B2Parker Netsushori Kogyo K.K.
- Braking band of a disk for disk brake21 Oct 2025US 12,449,011 B2Brembo S.p.A.
- Method for treating a part made of ferrous metal, and part made of ferrous metal15 Apr 2025US 12,276,032 B2Hydromecanique Et Frottement
- Guiding member, mechanical system comprising such a guiding member, and method for producing such a guiding member24 Sep 2024US 12,098,744 B2Hydromecanique Et Frottement
- Sliding spline shaft device12 Mar 2024US 11,927,225 B2Nihon Parkerizing Co., Ltd.
- Method of manufacturing nitrided valve seat insert with supersaturated nitrogen surface layer and product thereof5 Mar 2026US 2026/0062786 A1L. E. Jones Company
- Method for treating a part made of iron alloy for improving the anti-corrosion properties thereof29 May 2025US 2025/0171906 A1Hydromecanique Et Frottement
- Processing method and processing apparatus for metal component11 Jan 2024US 2024/0011142 A1Parker Netsushori Kogyo K.K.
- Method for treating a part made of ferrous metal, and part made of ferrous metal26 Jan 2023US 2023/0029324 A1Hydromecanique Et Frottement
- Braking band of a disk for disk brake19 Jan 2023US 2023/0018275 A1Brembo S.p.A.
Most cited
By later US patents
- Process for nitrocarburizing components made from steel10US 5,102,476 ADegussa AG · 1992
- Method of treating ferrous surfaces subjected to high friction strains10US 5,753,052 ACentre Stephanois de Recherches Mecaniques Hydromecanique et Frottement · 1998
- Process for case hardening steel8US 4,268,323 AKolene Corporation · 1981
- Extreme duty machine gun barrel4US 8,333,029 B12012
- Method for hardening stainless steel and molten salt bath for realizing said process3US 7,909,943 B2Durferrit GmbH · 2011