C21D 2211/009
Pearlite
C21D2211/009 (Pearlite) appears on 520 US grants and 807 published applications in this corpus.
Search patents in C21D- Granted patents
- 520
- Published applications
- 807
- Assignees
- 220
- Inventors
- 1,541
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 3 | 0 |
| 1998 | 7 | 0 |
| 1999 | 3 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 2 |
| 2002 | 4 | 5 |
| 2003 | 8 | 16 |
| 2004 | 7 | 8 |
| 2005 | 6 | 4 |
| 2006 | 2 | 2 |
| 2007 | 4 | 4 |
| 2008 | 3 | 5 |
| 2009 | 1 | 9 |
| 2010 | 8 | 18 |
| 2011 | 5 | 15 |
| 2012 | 10 | 18 |
| 2013 | 6 | 28 |
| 2014 | 12 | 27 |
| 2015 | 19 | 47 |
| 2016 | 20 | 40 |
| 2017 | 29 | 44 |
| 2018 | 30 | 43 |
| 2019 | 31 | 58 |
| 2020 | 36 | 57 |
| 2021 | 37 | 39 |
| 2022 | 35 | 71 |
| 2023 | 25 | 57 |
| 2024 | 39 | 69 |
| 2025 | 48 | 58 |
| 2026 | 54 | 63 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-strength alloyed hot-dip galvanized steel sheet and manufacturing method therefor6 Oct 2026US 12,753,477 B2Kobe Steel, Ltd.
- Welded rail29 Sep 2026US 12,747,483 B2Nippon Steel Corporation
- Wire rod and steel wire for high strength spring, and manufacturing method therefor22 Sep 2026US 12,742,220 B2Posco
- 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
- Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor17 Sep 2026US 2026/0275439 A1Posco
- Steel sheet and method of production of same17 Sep 2026US 2026/0275470 A1Nippon Steel Corporation
- Cold-rolled steel sheet, stamping member, and manufacturing method for cold-rolled steel sheet17 Sep 2026US 2026/0275475 A1Baoshan Iron & Steel Co., Ltd.
- Method for Producing a Rail for Railway Infrastructure10 Sep 2026US 2026/0265854 A1voestalpine Rail Technology GmbH
- Steel material for vacuum tube and method of manufacturing same10 Sep 2026US 2026/0265856 A1Posco
Most cited
By later US patents
- Steel plate having superior toughness in weld heat-affected zone and welded structure made therefrom84US 7,105,066 B2Posco · 2006
- Rails of pearlitic steel with high wear resistance and toughness and their manufacturing methods25US 5,658,400 ANippon Steel Corporation · 1997
- Pearlitic steel rail having excellent wear resistance and method of producing the same22US 5,762,723 ANippon Steel Corporation · 1998
- Method for heat treating an impact beam of automotive vehicle door and a system of the same20US 5,487,795 ADong Won Metal Ind. Co., Ltd. · 1996
- Cold formed high-strength steel structural members16US 5,496,425 AConsolidated Metal Products, Inc. · 1996