C21D 9/0075
Heat treatment: for rods of limited length
Official title: {for rods of limited length (of unlimited length C21D9/52)}
C21D9/0075 (Heat treatment: for rods of limited length) appears on 118 US grants and 161 published applications in this corpus.
Search patents in C21D- Granted patents
- 118
- Published applications
- 161
- Assignees
- 111
- Inventors
- 446
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 0 |
| 2003 | 1 | 1 |
| 2004 | 3 | 1 |
| 2005 | 0 | 1 |
| 2006 | 0 | 3 |
| 2007 | 0 | 0 |
| 2008 | 0 | 6 |
| 2009 | 4 | 8 |
| 2010 | 1 | 5 |
| 2011 | 1 | 5 |
| 2012 | 3 | 3 |
| 2013 | 1 | 2 |
| 2014 | 3 | 5 |
| 2015 | 1 | 11 |
| 2016 | 4 | 6 |
| 2017 | 5 | 5 |
| 2018 | 5 | 4 |
| 2019 | 1 | 11 |
| 2020 | 5 | 13 |
| 2021 | 9 | 4 |
| 2022 | 9 | 13 |
| 2023 | 4 | 15 |
| 2024 | 8 | 21 |
| 2025 | 11 | 14 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Non-quenched and tempered round steel with high strength, high toughness and easy cutting and manufacturing method therefor16 Jun 2026US 12,655,508 B2Baoshan Iron & Steel Co., Ltd.
- Austenitic stainless steel material, method for producing the same, and device for hydrogen16 Jun 2026US 12,655,509 B2Nippon Steel Stainless Steel Corporation
- Strong and ductile medium manganese steel and method of making12 May 2026US 12,624,429 B2The University of Hong Kong
- Steel, steel bar and manufacturing method thereof28 Apr 2026US 12,612,686 B2Baoshan Iron & Steel Co., Ltd.
- Fe—Co-based alloy bar13 Jan 2026US 12,522,899 B2Proterial, Ltd.
- Low-thermal-expansion alloy20 Aug 2026US 2026/0242897 A1Shinhokoku Material Corp.
- Steel material suitable for use in sour environment30 Jul 2026US 2026/0218356 A1Nippon Steel Corporation
- Method for producing fe-co alloy rod5 Mar 2026US 2026/0062775 A1Proterial, Ltd.
- Method for producing fe-co-based alloy rod, and fe-co-based alloy rod26 Feb 2026US 2026/0055492 A1Proterial, Ltd.
- Martensitic stainless steel material23 Oct 2025US 2025/0327158 A1Nippon Steel Corporation
Most cited
By later US patents
- Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method46US 7,559,221 B2Rinascimetalli Ltd. · 2009
- Resistance heating process and apparatus15US 5,744,773 ANewcor, Inc. · 1998
- Method for in-line heat treatment of hot rolled stock11US 6,336,980 B12002
- Method for manufacturing tapered rods9US 4,842,818 ADaido Tokushuko Kabushiki Kaisha · 1989
- Method and apparatus for pressing parts from round stock8US 4,404,830 AL. Schuler GmbH · 1983