C23C 8/50
Of ferrous surfaces
Official title: of ferrous surfaces
C23C8/50 (Of ferrous surfaces) appears on 77 US grants and 89 published applications in this corpus.
Search patents in C23C- Granted patents
- 77
- Published applications
- 89
- Assignees
- 68
- Inventors
- 259
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 4 |
| 2004 | 3 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
| 2011 | 2 | 2 |
| 2012 | 0 | 5 |
| 2013 | 1 | 3 |
| 2014 | 1 | 4 |
| 2015 | 2 | 11 |
| 2016 | 0 | 1 |
| 2017 | 8 | 9 |
| 2018 | 4 | 6 |
| 2019 | 7 | 4 |
| 2020 | 5 | 7 |
| 2021 | 8 | 7 |
| 2022 | 3 | 3 |
| 2023 | 6 | 2 |
| 2024 | 6 | 2 |
| 2025 | 1 | 3 |
| 2026 | 2 | 4 |
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.
- Steel sheet and method of manufacturing a steel sheet for packaging10 Feb 2026US 12,545,973 B2thyssenkrupp Rasselstein GmbH
- Iron-based nanoparticles and grains30 Dec 2025US 12,512,238 B2Regents of the University of Minnesota
- Precipitation strengthened carburizable and nitridable steel alloys26 Nov 2024US 12,152,295 B2QuesTek Innovations LLC
- FeNi ordered alloy, method for manufacturing FeNi ordered alloy, and magnetic material including FeNi ordered alloy19 Nov 2024US 12,146,210 B2Denso Corporation
- Ceramic coating13 Aug 2026US 2026/0234782 A1
- Method for producing a nitrided part of an aircraft turbomachine9 Jul 2026US 2026/0193767 A1Safran
- Impregnation liquid, method of treatment with such an impregnation liquid, and treated part obtained25 Jun 2026US 2026/0175351 A1Hydromecanique Et Frottement
- 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
Most cited
By later US patents
- Expandable locking thread joint100US 6,619,696 B2Baker Hughes Incorporated · 2003
- Process for nitriding iron and steel in salt baths regenerated with triazine polymers14US 4,019,928 ADuetsche Gold- und Silber-Scheideanstalt vormals Roessler · 1977
- Method of maintaining at very low values the content of cyanide in salt baths containing cyanates10US 4,006,043 ACentre Stephanois de Recherches Mecaniques Hydromecanique et Frottement · 1977
- 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