C21D 9/38
Heat treatment: for roll bodies
Official title: for roll bodies
C21D9/38 (Heat treatment: for roll bodies) appears on 107 US grants and 76 published applications in this corpus.
Search patents in C21D- Granted patents
- 107
- Published applications
- 76
- Assignees
- 72
- Inventors
- 288
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 1 |
| 2002 | 4 | 2 |
| 2003 | 1 | 1 |
| 2004 | 4 | 1 |
| 2005 | 2 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 0 | 1 |
| 2010 | 1 | 6 |
| 2011 | 0 | 5 |
| 2012 | 1 | 2 |
| 2013 | 3 | 2 |
| 2014 | 3 | 4 |
| 2015 | 1 | 8 |
| 2016 | 3 | 4 |
| 2017 | 6 | 6 |
| 2018 | 6 | 5 |
| 2019 | 3 | 4 |
| 2020 | 6 | 2 |
| 2021 | 2 | 1 |
| 2022 | 0 | 6 |
| 2023 | 5 | 2 |
| 2024 | 0 | 5 |
| 2025 | 2 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a rolling bearing component10 Feb 2026US 12,546,361 B2Schaeffler Technologies AG & Co. KG
- Differential heat treatment method for forming roller2 Dec 2025US 12,486,550 B2
- Method for controlling carbide network in a bearing steel wire rod by controlling cooling and controlling rolling25 Feb 2025US 12,234,522 B2Jiangyin Xingcheng Gold Materials Co., Ltd
- Heat-treated roller bearing ring21 Nov 2023US 11,821,465 B2Aktiebolaget Skf
- Centrifugally cast composite roll for hot rolling1 Aug 2023US 11,712,723 B2Proterial, Ltd.
- Forged steel roll13 Aug 2026US 2026/0234772 A1Nippon Steel Corporation
- Method for producing a rolling bearing component21 May 2026US 2026/0139708 A1Schaeffler Technologies AG & Co. KG
- Method for manufacturing high-chromium (cr) molten steel, method for manufacturing cast piece, and method for manufacturing press roll16 Apr 2026US 2026/0103769 A1Posco
- Differential heat treatment method for forming roller14 Aug 2025US 2025/0257421 A1
- Component for a rolling bearing and corresponding method for producing the component26 Sep 2024US 2024/0318690 A1
Most cited
By later US patents
- Ultrasonic impact machining of body surfaces to correct defects and strengthen work surfaces72US 6,932,876 B1U.I.T., L.L.C. · 2005
- Process for marking the surface of a rolling mill39US 4,806,731 A1989
- Cold rolled steel sheets having an improved press formability28US 4,775,599 AKawasaki Steel Corporation · 1988
- Repaired turbine rotor wheel27US 6,494,683 B1General Electric Company · 2002
- Method and apparatus for forming microcavities on the surface of a rolling mill roll25US 4,322,600 ACentre de Recherches Metallurgiques-Centrum voor Research in de Metallurgie · 1982