C21C 7/0685
Of stainless steel
Official title: {of stainless steel}
C21C7/0685 (Of stainless steel) appears on 80 US grants and 26 published applications in this corpus.
Search patents in C21C- Granted patents
- 80
- Published applications
- 26
- Assignees
- 48
- Inventors
- 184
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 4 | 0 |
| 1978 | 3 | 0 |
| 1979 | 8 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 3 | 4 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 1 | 2 |
| 2010 | 1 | 3 |
| 2011 | 1 | 2 |
| 2012 | 2 | 1 |
| 2013 | 2 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for preparing stainless steel seamless tube with ultra-high cleanliness for integrated circuit and IC industry preparation device, and stainless steel seamless tube14 Apr 2026US 12,601,026 B2Shengtak New Materials Co., Ltd
- Fe—Ni—Cr alloy having superior corrosion resistance, weldability, and oxidation resistance30 Dec 2025US 12,509,753 B2Nippon Yakin Kogyo Co., Ltd.
- Ferritic stainless steel12 Jul 2022US 11,384,405 B2Outokumpu Oyj
- Grain refinement in iron-based materials5 Nov 2019US 10,465,258 B2The Curators of the University of Missouri
- Method for manufacturing duplex stainless steel sheet having reduced inclusions16 Jan 2018US 9,869,002 B2Posco
- Method for manufacturing high-chromium (cr) molten steel, method for manufacturing cast piece, and method for manufacturing press roll16 Apr 2026US 2026/0103769 A1Posco
- Martensitic stainless steel material24 Jul 2025US 2025/0236939 A1Nippon Steel Corporation
- Martensitic stainless steel material8 May 2025US 2025/0146112 A1Nippon Steel Corporation
- Precipitation hardening martensitic stainless steel having excellent weldability, and method for producing the same14 Nov 2024US 2024/0376561 A1Nippon Yakin Kogyo Co., Ltd.
- Method for Preparing Stainless Steel Seamless Tube with Ultra-High Cleanliness for Integrated Circuit and IC Industry Preparation Device, and Stainless Steel Seamless Tube28 Sep 2023US 2023/0304118 A1Jiangsu Wujin Stainless Steel Pipe Group Co., Ltd.
Most cited
By later US patents
- Method of decarburizing molten metal in the refining of steel using neural networks87US 5,327,357 APraxair Technology, Inc. · 1994
- Process and unit for supplying a gas under pressure to an installation that consumes a constituent of air17US 5,505,052 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1996
- Replacement of argon with carbon dioxide in a reactor containing molten metal for the purpose of refining molten metal13US 5,190,577 ALiquid Air Corporation · 1993
- Method for controlling secondary top-blown oxygen in subsurface pneumatic steel refining10US 4,599,107 AUnion Carbide Corporation · 1986
- Process for refining high-carbon ferro-alloys8US 4,130,417 AGfE Gesellschaft fur Elektrometallurgie mit beschrankter Haftung · 1978