C21D 2221/10
Differential treatment of inner with respect to outer regions
Official title: Differential treatment of inner with respect to outer regions, e.g. core and periphery, respectively
C21D2221/10 (Differential treatment of inner with respect to outer regions) appears on 147 US grants and 138 published applications in this corpus.
Search patents in C21D- Granted patents
- 147
- Published applications
- 138
- Assignees
- 124
- Inventors
- 451
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 4 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 0 |
| 2002 | 12 | 5 |
| 2003 | 5 | 4 |
| 2004 | 3 | 5 |
| 2005 | 3 | 3 |
| 2006 | 1 | 7 |
| 2007 | 4 | 0 |
| 2008 | 2 | 4 |
| 2009 | 5 | 2 |
| 2010 | 2 | 4 |
| 2011 | 1 | 6 |
| 2012 | 2 | 12 |
| 2013 | 2 | 5 |
| 2014 | 4 | 8 |
| 2015 | 8 | 7 |
| 2016 | 5 | 10 |
| 2017 | 6 | 5 |
| 2018 | 6 | 5 |
| 2019 | 6 | 5 |
| 2020 | 5 | 11 |
| 2021 | 5 | 7 |
| 2022 | 5 | 7 |
| 2023 | 6 | 3 |
| 2024 | 2 | 6 |
| 2025 | 6 | 3 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method and arrangement for producing a hardened sheet metal product2 Sep 2025US 12,403,518 B2Tc Tech Sweden AB
- Carbonitrided bearing component15 Jul 2025US 12,359,268 B2Jtekt Corporation
- Cold-rolling strip steel with strength and hardness thereof varying in thickness direction and manufacturing method therefor8 Jul 2025US 12,351,887 B2Baoshan Iron & Steel Co., Ltd.
- Gear component24 Jun 2025US 12,338,885 B2Hitachi Construction Machinery Co., Ltd.
- Hot stamping component and manufacturing method therefor27 Aug 2026US 2026/0249342 A1Hyundai Steel Company
- Steel section having a thickness of at least 100mm and method of manufacturing the same2 Jul 2026US 2026/0185179 A1
- Pin Bushing and Method of Manufacturing the Same7 May 2026US 2026/0126080 A1Caterpillar Inc.
- Method for manufacturing laminated iron core and heating device12 Feb 2026US 2026/0042277 A1Mitsui High-Tec, Inc.
- High-yield ratio high-strength steel plate having excellent impact resistance after cold forming and manufacturing method thereof16 Oct 2025US 2025/0320590 A1Posco
Most cited
By later US patents
- Ground-engaging tool for an excavation bucket60US 6,457,269 B1Caterpillar SARL · 2002
- Screwdriver, screwdriver bit or the like50US 5,953,969 AWera Werk Hermann Werner GmbH & Co. · 1999
- Toothed wheel for use in automobiles and its manufacturing method42US 5,310,432 AKubota Iron Works Co., Ltd. · 1994
- Method of baking treatment of steel product parts37US 6,855,217 B2Aoyama Seisakusho Co., Ltd. · 2005
- Method of manufacturing case-hardened parts with little distortion in heat treatment and superior strength in bending fatigue34US 5,595,610 AKabushiki Kaisha Kobe Seiko Sho · 1997