C21D 2281/02
Temperature gradient
Official title: temperature gradient
C21D2281/02 (Temperature gradient) appears on 19 US grants and 8 published applications in this corpus.
Search patents in C21D- Granted patents
- 19
- Published applications
- 8
- Assignees
- 13
- Inventors
- 46
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hot-rolled steel sheet and manufacturing method thereof1 Jul 2025US 12,344,913 B2Nippon Steel Corporation
- Method for thermal processing bullets26 Nov 2024US 12,152,285 B2
- Multiple layer FePt structure20 Feb 2018US 9,899,050 B2Seagate Technology LLC
- Multiple layer FePt structure13 Dec 2016US 9,520,151 B2Seagate Technology LLC
- Method of making grain-oriented magnetic steel sheet having low iron loss23 Jul 2002US 6,423,157 B2Kawasaki Steel Corporation
- Thermally Treating a Metallic Component9 Jul 2026US 2026/0193728 A1
- Method for Thermal Processing Bullets9 Apr 2026US 2026/0098314 A1
- Hot-rolled steel sheet and manufacturing method thereof30 Mar 2023US 2023/0097055 A1Nippon Steel Corporation
- Method for thermal processing bullets11 Jun 2020US 2020/0181723 A1
- Dissimilar metal joined material and method of manufacturing same7 Nov 2019US 2019/0337086 A1Hitachi Metals, Ltd.
Most cited
By later US patents
- Apparatus and method for making uniformly38US 5,891,212 AAeroquip Corporation · 1999
- Method and apparatus for characterizing and controlling the heat treatment of a metal alloy25US 5,981,919 ABouillon, Inc. · 1999
- Apparatus and method for making uniformly sized and shaped spheres21US 6,083,454 AAeroquip Corporation · 2000
- Batch annealing apparatus11US 4,502,671 ANippon Steel Corporation · 1985
- Method of producing grain oriented silicon steel sheets having magnetic properties11US 4,975,127 AKawasaki Steel Corporation · 1990