C23C 8/38
Treatment of ferrous surfaces
C23C8/38 (Treatment of ferrous surfaces) appears on 127 US grants and 135 published applications in this corpus.
Search patents in C23C- Granted patents
- 127
- Published applications
- 135
- Assignees
- 130
- Inventors
- 436
- Latest grant
- 24 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 2 |
| 2004 | 3 | 3 |
| 2005 | 0 | 2 |
| 2006 | 0 | 5 |
| 2007 | 1 | 6 |
| 2008 | 0 | 8 |
| 2009 | 0 | 3 |
| 2010 | 5 | 7 |
| 2011 | 3 | 5 |
| 2012 | 6 | 7 |
| 2013 | 4 | 7 |
| 2014 | 2 | 10 |
| 2015 | 3 | 12 |
| 2016 | 3 | 4 |
| 2017 | 8 | 8 |
| 2018 | 11 | 5 |
| 2019 | 8 | 11 |
| 2020 | 4 | 2 |
| 2021 | 8 | 7 |
| 2022 | 3 | 9 |
| 2023 | 3 | 2 |
| 2024 | 9 | 4 |
| 2025 | 3 | 1 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for plasma-assisted and multi-step continuous preparation of diffusion layer/amorphous carbon film composite coating and use thereof24 Jun 2025US 12,340,982 B2Anhui University of Technology
- Workpiece carrier device, method for coating a workpiece, and workpiece17 Jun 2025US 12,331,391 B2Oerlikon Surface Solutions AG, PfäFfikon
- 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
- Grain-oriented electrical steel sheet and manufacturing method therefor10 Sep 2024US 12,084,736 B2Posco
- Method for nitriding a steel3 Sep 2026US 2026/0258544 A1Safran Transmission Systems
- Method for producing a nitrided part of an aircraft turbomachine9 Jul 2026US 2026/0193767 A1Safran
- Hard film formed body, machine component, and bearing2 Jul 2026US 2026/0185562 A1Ntn Corporation
- Method of manufacturing nitrided valve seat insert with supersaturated nitrogen surface layer and product thereof5 Mar 2026US 2026/0062786 A1L. E. Jones Company
- Cutting tool insert4 Dec 2025US 2025/0367734 A1AB Sandvik Coromant
Most cited
By later US patents
- Screwdriver, screwdriver bit or the like50US 5,953,969 AWera Werk Hermann Werner GmbH & Co. · 1999
- Method for treating at least one part of soft magnetic material to form a hard wear area39US 5,769,965 ARobert Bosch GmbH · 1998
- Case-hardened stainless steel bearing component and process and manufacturing the same31US 5,851,313 AThe Timken Company · 1998
- Duplex coated steel composite products and method of manufacturing them30US 6,110,571 AResearch Institute for Metal Surface of High Performance, Ltd. · 2000
- Case hardened roller cutter for a rotary drill bit and method of making24US 4,969,378 AReed Tool Company · 1990