C21D 1/84
Controlled slow cooling
Official title: Controlled slow cooling (cooling-beds for metal rolling B21B43/00)
C21D1/84 (Controlled slow cooling) appears on 198 US grants and 316 published applications in this corpus.
Search patents in C21D- Granted patents
- 198
- Published applications
- 316
- Assignees
- 152
- Inventors
- 973
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 3 |
| 2002 | 2 | 2 |
| 2003 | 3 | 2 |
| 2004 | 2 | 2 |
| 2005 | 3 | 1 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 0 | 2 |
| 2010 | 3 | 1 |
| 2011 | 1 | 5 |
| 2012 | 0 | 1 |
| 2013 | 3 | 0 |
| 2014 | 0 | 3 |
| 2015 | 1 | 8 |
| 2016 | 5 | 29 |
| 2017 | 2 | 1 |
| 2018 | 10 | 12 |
| 2019 | 11 | 5 |
| 2020 | 7 | 14 |
| 2021 | 8 | 11 |
| 2022 | 4 | 15 |
| 2023 | 7 | 27 |
| 2024 | 14 | 76 |
| 2025 | 24 | 49 |
| 2026 | 36 | 43 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Ultra-high strength cold rolled steel sheet having excellent bendability, and method of manufacturing same6 Oct 2026US 12,753,455 B2Posco
- Hot-rolled steel sheet15 Sep 2026US 12,735,778 B2Nippon Steel Corporation
- Zinc or zinc-alloy coated strip or steel with improved zinc adhesion15 Sep 2026US 12,735,780 B2voestalpine Stahl GmbH
- Hot-rolled steel sheet for non-oriented electromagnetic steel sheets25 Aug 2026US 12,716,120 B2Nippon Steel Corporation
- Method for fabricating a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and magnetic part cut from same18 Aug 2026US 12,709,790 B2Aperam
- Steel sheet, member, and methods for manufacturing same17 Sep 2026US 2026/0275444 A1Jfe Steel Corporation
- Method for Producing a Rail for Railway Infrastructure10 Sep 2026US 2026/0265854 A1voestalpine Rail Technology GmbH
- Plated steel sheet and method for manufacturing same10 Sep 2026US 2026/0265880 A1Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
- A bainite seamless steel pipe and manufacturing method therefor3 Sep 2026US 2026/0258534 A1Baoshan Iron & Steel Co., Ltd.
- 1000mpa-grade high hole expansion hot-rolled complex phase steel plate and manufacturing method thereof3 Sep 2026US 2026/0258535 A1Baoshan Iron & Steel Co., Ltd.
Most cited
By later US patents
- Double wall fast cool-down furnace366US 4,802,441 ABTU Engineering Corporation · 1989
- Ductile medium-and high-density, non-toxic shot and other articles and method for producing the same31US 7,267,794 B22007
- Combined sintering-annealing furnace30US 4,579,319 AM. C. L. Co., Ltd. · 1986
- Process for combined casting and heat treatment25US 5,327,955 AThe Board of Trustees of Western Michigan University · 1994
- Pearlitic steel rail having excellent wear resistance and method of producing the same22US 5,762,723 ANippon Steel Corporation · 1998