C21D 9/52
Heat treatment: for wires
Official title: for wires; for strips {; for rods of unlimited length}
C21D9/52 (Heat treatment: for wires) appears on 1,640 US grants and 1,500 published applications in this corpus.
Search patents in C21D- Granted patents
- 1,640
- Published applications
- 1,500
- Assignees
- 731
- Inventors
- 4,186
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 17 | 0 |
| 1977 | 34 | 0 |
| 1978 | 22 | 0 |
| 1979 | 23 | 0 |
| 1980 | 22 | 0 |
| 1981 | 28 | 0 |
| 1982 | 30 | 0 |
| 1983 | 35 | 0 |
| 1984 | 33 | 0 |
| 1985 | 36 | 0 |
| 1986 | 33 | 0 |
| 1987 | 31 | 0 |
| 1988 | 36 | 0 |
| 1989 | 31 | 0 |
| 1990 | 25 | 0 |
| 1991 | 21 | 0 |
| 1992 | 17 | 0 |
| 1993 | 28 | 0 |
| 1994 | 26 | 0 |
| 1995 | 21 | 0 |
| 1996 | 25 | 0 |
| 1997 | 34 | 0 |
| 1998 | 33 | 0 |
| 1999 | 25 | 0 |
| 2000 | 25 | 0 |
| 2001 | 25 | 8 |
| 2002 | 24 | 24 |
| 2003 | 25 | 24 |
| 2004 | 23 | 26 |
| 2005 | 13 | 18 |
| 2006 | 6 | 28 |
| 2007 | 10 | 25 |
| 2008 | 13 | 22 |
| 2009 | 22 | 47 |
| 2010 | 12 | 44 |
| 2011 | 16 | 43 |
| 2012 | 15 | 45 |
| 2013 | 29 | 49 |
| 2014 | 35 | 46 |
| 2015 | 32 | 84 |
| 2016 | 38 | 89 |
| 2017 | 48 | 98 |
| 2018 | 56 | 81 |
| 2019 | 71 | 81 |
| 2020 | 65 | 97 |
| 2021 | 62 | 80 |
| 2022 | 64 | 95 |
| 2023 | 60 | 105 |
| 2024 | 57 | 104 |
| 2025 | 73 | 73 |
| 2026 | 55 | 64 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hot rolled high strength steel strip having high hole expansion ratio6 Oct 2026US 12,753,461 B2Tata Steel Ijmuiden B.V.
- Method for producing a steel part and steel part6 Oct 2026US 12,753,462 B2ArcelorMittal
- Steel sheet for hot press formed member22 Sep 2026US 12,741,447 B2Posco
- Wire rod for 5000 MPa-grade diamond wire and production method therefor15 Sep 2026US 12,735,763 B2Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
- Zinc or zinc-alloy coated strip or steel with improved zinc adhesion15 Sep 2026US 12,735,780 B2voestalpine Stahl GmbH
- Martensitic stainless steel strip8 Oct 2026US 2026/0308709 A1Proterial, Ltd.
- Method and device for rapidly cooling a metal strip and continuous production line for metal strips1 Oct 2026US 2026/0297700 A1Fives Stein
- Annealing method for hot-rolled steel strip, and method for producing electrical steel sheet using such annealing method24 Sep 2026US 2026/0286461 A1Jfe Steel Corporation
- Low-coercivity wire rod and manufacturing method therefor24 Sep 2026US 2026/0286481 A1Baoshan Iron & Steel Co., Ltd.
- An annealing apparatus for a metal strip coating system17 Sep 2026US 2026/0275448 A1Danieli & C. Officine Meccaniche SpA
Most cited
By later US patents
- Guidewire having braided wire over drawn tube construction109US 6,142,975 AAdvanced Cardiovascular Systems, Inc. · 2000
- Insulated furnace door and wall panel system72US 5,483,548 A1996
- High strength steel sheet having excellent formability and method for production thereof66US 7,090,731 B2Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) · 2006
- Color marks on catheter guide wire57US 4,951,686 AB. Braun-SSC AG · 1990
- Method and apparatus for flexible manufacturing a discrete curved product from feed stock47US 6,813,923 B2Trico Products Corporation · 2004