C21D 8/0257
With diffusion of elements
Official title: {with diffusion of elements, e.g. decarburising, nitriding}
C21D8/0257 (With diffusion of elements) appears on 126 US grants and 177 published applications in this corpus.
Search patents in C21D- Granted patents
- 126
- Published applications
- 177
- Assignees
- 62
- Inventors
- 420
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 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 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 3 |
| 2004 | 1 | 1 |
| 2005 | 3 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 3 |
| 2011 | 2 | 2 |
| 2012 | 0 | 0 |
| 2013 | 1 | 3 |
| 2014 | 0 | 4 |
| 2015 | 3 | 3 |
| 2016 | 3 | 4 |
| 2017 | 3 | 12 |
| 2018 | 5 | 7 |
| 2019 | 6 | 9 |
| 2020 | 4 | 13 |
| 2021 | 10 | 10 |
| 2022 | 13 | 21 |
| 2023 | 10 | 22 |
| 2024 | 15 | 33 |
| 2025 | 21 | 12 |
| 2026 | 11 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Steel sheet and plated steel sheet25 Aug 2026US 12,716,111 B2Nippon Steel Corporation
- Method of heat treating a steel component18 Aug 2026US 12,709,781 B2Aktiebolaget Skf
- Galvanized steel sheet and member, and method of producing same18 Aug 2026US 12,709,783 B2Jfe Steel Corporation
- Production of carbon materials via metal melt spinning4 Aug 2026US 12,698,209 B2The Johns Hopkins University
- Steel sheet and press-formed article16 Jun 2026US 12,655,511 B2Nippon Steel Corporation
- Grain-oriented electrical steel sheet and wound iron core10 Sep 2026US 2026/0265881 A1Jfe Steel Corporation
- Steel sheet10 Sep 2026US 2026/0265883 A1Nippon Steel Corporation
- Hot-stamp formed body and aluminum-coated steel sheet for hot stamping13 Aug 2026US 2026/0234770 A1Nippon Steel Corporation
- Steel sheet and method for producing same6 Aug 2026US 2026/0226573 A1Nippon Steel Corporation
- Plated steel sheet6 Aug 2026US 2026/0226600 A1Nippon Steel Corporation
Most cited
By later US patents
- Method of making CG iron16US 4,596,606 AFord Motor Company · 1986
- Process for manufacturing a foil of ferritic stainless steel having a high aluminum content, aluminum-containing ferritic stainless steel, and catalyst support useful for a motor-vehicle exhaust13US 6,086,689 AUsinor · 2000
- Cold rolled steel sheets having an excellent enamelability and a method for producing said cold rolled steel sheets11US 3,950,191 AKawasaki Steel Corporation · 1976
- Television picture tube inner shielding material having a blackened layer of superior adhesion and method of manufacturing the same10US 5,094,920 ANippon Steel Corporation · 1992
- Method for producing workpieces from lightweight steel having material properties that are adjustable across the wall thickness10US 9,593,392 B2Salzgitter Flachstahl GmbH · 2017