C21D 9/085
Cooling or quenching
Official title: {Cooling or quenching}
C21D9/085 (Cooling or quenching) appears on 267 US grants and 371 published applications in this corpus.
Search patents in C21D- Granted patents
- 267
- Published applications
- 371
- Assignees
- 138
- Inventors
- 744
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 7 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 3 |
| 2005 | 1 | 2 |
| 2006 | 0 | 5 |
| 2007 | 4 | 4 |
| 2008 | 2 | 5 |
| 2009 | 2 | 6 |
| 2010 | 1 | 7 |
| 2011 | 3 | 11 |
| 2012 | 2 | 11 |
| 2013 | 3 | 12 |
| 2014 | 3 | 15 |
| 2015 | 13 | 21 |
| 2016 | 9 | 25 |
| 2017 | 15 | 25 |
| 2018 | 16 | 27 |
| 2019 | 22 | 28 |
| 2020 | 23 | 23 |
| 2021 | 18 | 27 |
| 2022 | 26 | 22 |
| 2023 | 11 | 23 |
| 2024 | 14 | 23 |
| 2025 | 22 | 14 |
| 2026 | 14 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same22 Sep 2026US 12,742,221 B2Jfe Steel Corporation
- Method of forming and heat treating coiled tubing22 Sep 2026US 12,742,232 B2Tenaris Coiled Tubes, LLC
- Stainless steel seamless pipe for oil country tubular goods and method for manufacturing the same23 Jun 2026US 12,662,725 B2Jfe Steel Corporation
- Austenitic stainless steel material, method for producing the same, and device for hydrogen16 Jun 2026US 12,655,509 B2Nippon Steel Stainless Steel Corporation
- Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor26 May 2026US 12,637,727 B2Posco
- Production and preparation method of carburized gear shaft bars by means of converter process24 Sep 2026US 2026/0286458 A1Bengang Steel Plates Co., Ltd.
- High-strength stainless steel seamless pipe for oil wells24 Sep 2026US 2026/0286485 A1Jef Steel Corporation
- Ultra-high-strength hot-rolled steel sheet, steel pipe, member, and manufacturing methods therefor17 Sep 2026US 2026/0275439 A1Posco
- Steel material17 Sep 2026US 2026/0275472 A1Nippon Steel Corporation
- Steel material10 Sep 2026US 2026/0265888 A1Nippon Steel Corporation
Most cited
By later US patents
- Metallic tubular structure having improved collapse strength and method of producing the same44US 4,825,674 ASumitomo Metal Industries, Ltd. · 1989
- Steel pipe hardening apparatus37US 4,376,528 AKawasaki Steel Corporation · 1983
- Method of making ultra high strength steel having good toughness32US 8,414,715 B2Siderca S.A.I.C. · 2013
- Coiled tube with varying mechanical properties for superior performance and methods to produce the same by a continuous heat treatment29US 10,480,054 B2Tenaris Coiled Tubes, LLC · 2019
- High-strength steel for seamless, weldable steel pipes28US 8,007,603 B2Tenaris Connections Limited · 2011