C23C 8/30
Carbo-nitriding
C23C8/30 (Carbo-nitriding) appears on 298 US grants and 370 published applications in this corpus.
Search patents in C23C- Granted patents
- 298
- Published applications
- 370
- Assignees
- 177
- Inventors
- 752
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 3 |
| 2002 | 9 | 6 |
| 2003 | 3 | 3 |
| 2004 | 2 | 13 |
| 2005 | 3 | 9 |
| 2006 | 1 | 12 |
| 2007 | 3 | 8 |
| 2008 | 7 | 4 |
| 2009 | 4 | 11 |
| 2010 | 6 | 8 |
| 2011 | 5 | 14 |
| 2012 | 5 | 16 |
| 2013 | 11 | 20 |
| 2014 | 13 | 35 |
| 2015 | 13 | 26 |
| 2016 | 11 | 27 |
| 2017 | 25 | 25 |
| 2018 | 25 | 17 |
| 2019 | 14 | 19 |
| 2020 | 19 | 19 |
| 2021 | 17 | 19 |
| 2022 | 8 | 22 |
| 2023 | 11 | 12 |
| 2024 | 18 | 10 |
| 2025 | 9 | 5 |
| 2026 | 6 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method to produce high corrosion and wear resistant cast iron components by using laser cladding11 Aug 2026US 12,703,047 B2Oerlikon Surface Solutions AG, PfäFfikon
- Steel sheet for gas soft nitriding2 Jun 2026US 12,644,163 B2Nippon Steel Corporation
- Processing method and processing apparatus for metal component19 May 2026US 12,630,914 B2Parker Netsushori Kogyo K.K.
- Method to produce cast iron brake discs with high corrosion and wear resistance10 Mar 2026US 12,571,443 B2Oerlikon Surface Solutions AG, PfäFfikon
- Method of heat treating a steel component27 Jan 2026US 12,534,793 B2Aktiebolaget Skf
- Method for the heat treatment of metallic workpieces, and work-piece produced therewith8 Oct 2026US 2026/0308742 A1ALD Vacuum Technologies GmbH
- One-step carbo-nitro-austempering process for forming steel bearings10 Sep 2026US 2026/0265851 A1GM Global Technology Operations LLC
- Mechanical component and method for manufacturing mechanical component13 Aug 2026US 2026/0235197 A1Komatsu Ltd.
- Low-temperature case hardening of additive manufactured articles and materials and targeted application of surface modification23 Apr 2026US 2026/0108946 A1Swagelok Company
- Method of manufacturing nitrided valve seat insert with supersaturated nitrogen surface layer and product thereof5 Mar 2026US 2026/0062786 A1L. E. Jones Company
Most cited
By later US patents
- Ball-and-roller bearing41US 5,338,377 ANsk Ltd. · 1994
- Rolling bearing38US 5,352,303 ANsk Ltd. · 1994
- Rolling contact bearing and a method of producing thereof33US 5,658,082 ANtn Corporation · 1997
- Rolling bearing32US 5,030,017 ANippon Seiko Kabushiki Kaisha · 1991
- Atmosphere compositions and methods of using same for surface treating ferrous metals26US 4,049,472 AAir Products and Chemicals, Inc. · 1977