C23C 8/40
Solid state diffusion of only non-metal elements into metallic material surfaces: using
Official title: using liquids, e.g. salt baths, liquid suspensions
C23C8/40 (Solid state diffusion of only non-metal elements into metallic material surfaces: using) appears on 264 US grants and 302 published applications in this corpus.
Search patents in C23C- Granted patents
- 264
- Published applications
- 302
- Assignees
- 219
- Inventors
- 825
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 1 | 0 |
| 2002 | 4 | 6 |
| 2003 | 9 | 5 |
| 2004 | 4 | 4 |
| 2005 | 0 | 4 |
| 2006 | 2 | 10 |
| 2007 | 3 | 5 |
| 2008 | 3 | 10 |
| 2009 | 2 | 5 |
| 2010 | 6 | 16 |
| 2011 | 4 | 14 |
| 2012 | 7 | 13 |
| 2013 | 13 | 16 |
| 2014 | 8 | 23 |
| 2015 | 7 | 31 |
| 2016 | 10 | 7 |
| 2017 | 28 | 22 |
| 2018 | 10 | 15 |
| 2019 | 17 | 18 |
| 2020 | 15 | 15 |
| 2021 | 15 | 18 |
| 2022 | 8 | 9 |
| 2023 | 14 | 16 |
| 2024 | 13 | 6 |
| 2025 | 8 | 9 |
| 2026 | 3 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Processing method and processing apparatus for metal component19 May 2026US 12,630,914 B2Parker Netsushori Kogyo K.K.
- Surface-treated steel24 Feb 2026US 12,559,830 B2Nippon Steel Corporation
- 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
- Methods and compositions for forming magnetite coatings on ferrous metals16 Dec 2025US 12,497,684 B2Birchwood Laboratories, Inc.
- Residual liquid metal treatment during led fabrication20 Aug 2026US 2026/0242924 A1APPLIED Materials.Inc.
- 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
Most cited
By later US patents
- Surface treatment method135US 6,006,763 ASeiko Epson Corporation · 1999
- Expandable locking thread joint100US 6,619,696 B2Baker Hughes Incorporated · 2003
- Wear resistant nuclear fuel assembly components37US 5,265,137 ASiemens Power Corporation · 1993
- Methods and compositions for boronizing metallic surfaces31US 4,555,326 ABetz Laboratories, Inc. · 1985
- Metal oxide coated diatomite substrates31US 6,641,908 B1Ensci, Inc. · 2003