C21D 1/22
Martempering
C21D1/22 (Martempering) appears on 136 US grants and 258 published applications in this corpus.
Search patents in C21D- Granted patents
- 136
- Published applications
- 258
- Assignees
- 84
- Inventors
- 507
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 4 |
| 2009 | 1 | 2 |
| 2010 | 2 | 3 |
| 2011 | 1 | 1 |
| 2012 | 0 | 3 |
| 2013 | 1 | 8 |
| 2014 | 2 | 7 |
| 2015 | 4 | 15 |
| 2016 | 4 | 7 |
| 2017 | 8 | 16 |
| 2018 | 5 | 11 |
| 2019 | 15 | 18 |
| 2020 | 6 | 17 |
| 2021 | 6 | 24 |
| 2022 | 21 | 26 |
| 2023 | 8 | 26 |
| 2024 | 19 | 32 |
| 2025 | 25 | 15 |
| 2026 | 7 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-strength steel sheet having excellent bendability and formability and method for manufacturing same11 Aug 2026US 12,703,890 B2Posco
- Steel sheet, member, and method for producing steel sheet, and method for producing member12 May 2026US 12,624,413 B2Jfe Steel Corporation
- Steel material having excellent hydrogen embrittlement resistance and impact toughness and method for manufacturing14 Apr 2026US 12,601,027 B2Posco
- Method for producing a rolling bearing component10 Feb 2026US 12,546,361 B2Schaeffler Technologies AG & Co. KG
- Modified hot-dip galvanize coatings with low liquidus temperature, methods of making and using the same3 Feb 2026US 12,540,383 B2Colorado School of Mines
- Induction hardening treatment method and application for large bearing ring3 Sep 2026US 2026/0258521 A1
- Steel for knives20 Aug 2026US 2026/0242886 A1Proterial, Ltd.
- A high strength steel strip or sheet, and a method for producing the same20 Aug 2026US 2026/0242908 A1voestalpine Stahl GmbH
- Steel sheet, member, and method for producing the same6 Aug 2026US 2026/0226592 A1Jfe Steel Corporation
- Steel sheet30 Jul 2026US 2026/0218348 A1Nippon Steel Corporation
Most cited
By later US patents
- Secondary-hardening gear steel26US 8,801,872 B2QuesTek Innovations LLC · 2014
- High strength steel sheet and method for manufacturing the same15US 9,200,343 B2Jfe Steel Corporation · 2015
- High strength press-formed member and method for manufacturing the same14US 8,992,697 B2Jfe Steel Corporation · 2015
- Methods for manufacturing a high-strength press-formed member14US 9,644,247 B2Jfe Steel Corporation · 2017
- High-strength cold-rolled steel sheet and method for manufacturing the same (as amended)10US 10,174,396 B2Jfe Steel Corporation · 2019