C21D 1/28
Normalising
C21D1/28 (Normalising) appears on 143 US grants and 211 published applications in this corpus.
Search patents in C21D- Granted patents
- 143
- Published applications
- 211
- Assignees
- 118
- Inventors
- 623
- Latest grant
- 15 Sep 2026
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 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 5 |
| 2003 | 3 | 2 |
| 2004 | 2 | 3 |
| 2005 | 0 | 2 |
| 2006 | 0 | 4 |
| 2007 | 1 | 4 |
| 2008 | 0 | 1 |
| 2009 | 1 | 5 |
| 2010 | 1 | 8 |
| 2011 | 2 | 7 |
| 2012 | 6 | 6 |
| 2013 | 4 | 3 |
| 2014 | 2 | 4 |
| 2015 | 5 | 9 |
| 2016 | 5 | 9 |
| 2017 | 4 | 8 |
| 2018 | 4 | 10 |
| 2019 | 10 | 13 |
| 2020 | 7 | 10 |
| 2021 | 8 | 15 |
| 2022 | 8 | 32 |
| 2023 | 10 | 10 |
| 2024 | 15 | 23 |
| 2025 | 17 | 5 |
| 2026 | 9 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Plastic mold steel plate and method for producing same15 Sep 2026US 12,735,760 B2Institute of Research of Iron and Steel, Jianagsu Province/Sha-Steel, Co., Ltd. (Cn)
- Pressure vessel steel having excellent hydrogen induced cracking resistance, and manufacturing method therefor15 Sep 2026US 12,735,761 B2Posco
- 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 material having excellent hydrogen induced cracking resistance, and manufacturing method therefor7 Jul 2026US 12,674,219 B2Posco
- Ultra-thick steel sheet with excellent strength and low-temperature impact toughness and manufacturing method thereof16 Jun 2026US 12,655,496 B2Posco
- Low-alloy steel24 Sep 2026US 2026/0286488 A1ELSmidth A/S
- High-strength and low-iron-loss non-oriented electrical steel plate and manufacturing method therefor17 Sep 2026US 2026/0275466 A1Baoshan Iron & Steel Co., Ltd.
- Austenitic stainless steel containing niobium27 Aug 2026US 2026/0250818 A1Doosan Enerbility Co., Ltd.
- Austenitic stainless steel containing boron27 Aug 2026US 2026/0250823 A1Doosan Enerbility Co., Ltd.
- Austenitic stainless steel containing tungsten27 Aug 2026US 2026/0250824 A1Doosan Enerbility Co., Ltd.
Most cited
By later US patents
- Steel for oil well pipe with high corrosion resistance to wet carbon dioxide and seawater, and a seamless oil well pipe33US 6,217,676 B1Sumitomo Metal Industries, Ltd. · 2001
- Low-alloy carbon steel for the manufacture of pipes for exploration and the production of oil and/or gas having an improved corrosion resistance, a process for the manufacture of seamless pipes, and the seamless pipes obtained therefrom29US 6,648,991 B2Siderca S.A.I.C. · 2003
- High strength steel member with a low yield ratio19US 5,449,420 ASumitomo Metal Industries, Ltd. · 1995
- Heat resistance Cr-Mo alloy steel18US 6,358,336 B1Sumitomo Metal Industries, Ltd. · 2002
- Method of manufacturing high strength steel member with a low yield ratio12US 5,374,322 ASumitomo Metal Industries, Ltd. · 1994