C21D 1/74
Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
C21D1/74 (Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material) appears on 1,158 US grants and 1,305 published applications in this corpus.
Search patents in C21D- Granted patents
- 1,158
- Published applications
- 1,305
- Assignees
- 509
- Inventors
- 2,777
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 12 | 0 |
| 1978 | 8 | 0 |
| 1979 | 10 | 0 |
| 1980 | 19 | 0 |
| 1981 | 13 | 0 |
| 1982 | 6 | 0 |
| 1983 | 10 | 0 |
| 1984 | 8 | 0 |
| 1985 | 10 | 0 |
| 1986 | 14 | 0 |
| 1987 | 9 | 0 |
| 1988 | 6 | 0 |
| 1989 | 13 | 0 |
| 1990 | 12 | 0 |
| 1991 | 19 | 0 |
| 1992 | 17 | 0 |
| 1993 | 20 | 0 |
| 1994 | 19 | 0 |
| 1995 | 17 | 0 |
| 1996 | 11 | 0 |
| 1997 | 12 | 0 |
| 1998 | 25 | 0 |
| 1999 | 16 | 0 |
| 2000 | 16 | 0 |
| 2001 | 9 | 3 |
| 2002 | 7 | 14 |
| 2003 | 13 | 15 |
| 2004 | 12 | 21 |
| 2005 | 6 | 7 |
| 2006 | 13 | 24 |
| 2007 | 8 | 10 |
| 2008 | 12 | 17 |
| 2009 | 6 | 27 |
| 2010 | 8 | 29 |
| 2011 | 8 | 23 |
| 2012 | 15 | 31 |
| 2013 | 24 | 45 |
| 2014 | 25 | 36 |
| 2015 | 23 | 41 |
| 2016 | 29 | 75 |
| 2017 | 46 | 41 |
| 2018 | 48 | 54 |
| 2019 | 35 | 58 |
| 2020 | 45 | 70 |
| 2021 | 51 | 75 |
| 2022 | 63 | 124 |
| 2023 | 55 | 128 |
| 2024 | 86 | 161 |
| 2025 | 108 | 97 |
| 2026 | 68 | 79 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Wound core22 Sep 2026US 12,744,149 B2Nippon Steel Corporation
- Zinc or zinc-alloy coated strip or steel with improved zinc adhesion15 Sep 2026US 12,735,780 B2voestalpine Stahl GmbH
- Method for manufacturing grain-oriented electrical steel sheet8 Sep 2026US 12,729,412 B2Jfe Steel Corporation
- Steel sheet and plated steel sheet8 Sep 2026US 12,729,420 B2Nippon Steel Corporation
- Steel sheet1 Sep 2026US 12,723,295 B2Nippon Steel Corporation
- Steel sheet and plated steel sheet1 Oct 2026US 2026/0297714 A1Nippon Steel Corporation
- High-strength and low-iron-loss non-oriented electrical steel plate and manufacturing method therefor17 Sep 2026US 2026/0275466 A1Baoshan Iron & Steel Co., Ltd.
- Grain-oriented electrical steel sheet and method for forming insulating coating17 Sep 2026US 2026/0279630 A1Nippon Steel Corporation
- One-step carbo-nitro-austempering process for forming steel bearings10 Sep 2026US 2026/0265851 A1GM Global Technology Operations LLC
- Non-oriented silicon steel palte and production method therefor10 Sep 2026US 2026/0265878 A1Institute of Research of Iron and Steel, Jiangsu Province/Sha-Steel, Co. Ltd (Cn)
Most cited
By later US patents
- Hydrogen annealing process and apparatus therefor428US 6,527,884 B1Hitachi Kokusai Electric Inc. · 2003
- In-situ generation of heat treating atmospheres using non-cryogenically produced nitrogen320US 5,298,089 AAir Products and Chemicals, Inc. · 1994
- Implantable vascular and endoluminal stents and process of fabricating the same285US 5,843,117 AInflow Dynamics Inc. · 1998
- Implantable vascular and endoluminal stents171US 6,159,237 AInflow Dynamics Inc. · 2000
- Tubular stent with oval struts91US 7,153,322 B2Inflow Dynamics Inc. · 2006