C21D 1/68
Temporary coatings or embedding materials applied before or during heat treatment
C21D1/68 (Temporary coatings or embedding materials applied before or during heat treatment) appears on 197 US grants and 155 published applications in this corpus.
Search patents in C21D- Granted patents
- 197
- Published applications
- 155
- Assignees
- 146
- Inventors
- 578
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 18 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 3 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 9 | 0 |
| 1989 | 9 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 3 |
| 2003 | 2 | 1 |
| 2004 | 3 | 0 |
| 2005 | 0 | 4 |
| 2006 | 0 | 2 |
| 2007 | 1 | 2 |
| 2008 | 2 | 3 |
| 2009 | 3 | 9 |
| 2010 | 2 | 4 |
| 2011 | 4 | 10 |
| 2012 | 2 | 10 |
| 2013 | 4 | 11 |
| 2014 | 8 | 12 |
| 2015 | 4 | 9 |
| 2016 | 8 | 6 |
| 2017 | 9 | 5 |
| 2018 | 5 | 5 |
| 2019 | 2 | 11 |
| 2020 | 3 | 9 |
| 2021 | 6 | 3 |
| 2022 | 4 | 15 |
| 2023 | 7 | 8 |
| 2024 | 6 | 5 |
| 2025 | 8 | 4 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Annealing separator composition for grain- oriented electrical steel sheet, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet6 Oct 2026US 12,753,457 B2Posco
- Double-oriented electrical steel sheet and manufacturing method therefor24 Feb 2026US 12,559,807 B2Posco
- Modified hot-dip galvanize coatings with low liquidus temperature, methods of making and using the same3 Feb 2026US 12,540,383 B2Colorado School of Mines
- Steel sheet for hot stamping and hot-stamped member13 Jan 2026US 12,522,929 B2Nippon Steel Corporation
- Coated steel substrate18 Nov 2025US 12,473,609 B2ArcelorMittal
- Method of manufacturing overlapped hot stamped component2 Jul 2026US 2026/0183820 A1Nippon Steel Corporation
- Production method for a grain-oriented electrical steel sheet4 Jun 2026US 2026/0152815 A1Jfe Steel Corporation
- Grain-oriented electrical steel sheet26 Mar 2026US 2026/0085390 A1Nippon Steel Corporation
- Mixed powder, mgo particles, method for manufacturing grain-oriented electrical steel sheet, method for manufacturing mgo particles, and method for manufacturing mixed powder22 Jan 2026US 2026/0022433 A1Nippon Steel Corporation
- Overlapped blank for hot stamping and overlapped hot stamped component21 Aug 2025US 2025/0262841 A1Nippon Steel Corporation
Most cited
By later US patents
- Method for hot shaping a workpiece and agent for reducing the heat emission51US 8,685,298 B2Boehler Schmiedetechnik GmbH & Co KG · 2014
- Surface on a stainless steel matrix23US 6,824,883 B1NOVA Chemicals (International) S.A. · 2004
- Method for forming an insulating coating on an oriented silicon steel sheet22US 3,985,583 AKawasaki Steel Corporation · 1976
- Process for producing grain-oriented electrical steel sheet having improved magnetic properties18US 4,775,430 ANippon Steel Corporation · 1988
- Method and apparatus for controlling article temperature during treatment in vacuum15US 4,528,208 AZymet, Inc. · 1985