G01N 3/28
Investigating ductility
Official title: Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
G01N3/28 (Investigating ductility) appears on 54 US grants and 56 published applications in this corpus.
Search patents in G01N- Granted patents
- 54
- Published applications
- 56
- Assignees
- 52
- Inventors
- 176
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 0 |
| 2002 | 1 | 1 |
| 2003 | 3 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 3 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 2 |
| 2011 | 0 | 2 |
| 2012 | 1 | 0 |
| 2013 | 3 | 1 |
| 2014 | 0 | 2 |
| 2015 | 2 | 2 |
| 2016 | 1 | 2 |
| 2017 | 0 | 4 |
| 2018 | 4 | 6 |
| 2019 | 5 | 4 |
| 2020 | 2 | 7 |
| 2021 | 6 | 0 |
| 2022 | 1 | 3 |
| 2023 | 3 | 3 |
| 2024 | 6 | 4 |
| 2025 | 0 | 3 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Metal sheet forming limit determination method and forming limit determination system, and computer program15 Sep 2026US 12,734,634 B2Jfe Steel Corporation
- System and method to measure material ductility and toughness using cutting blades26 May 2026US 12,638,379 B2Massachusetts Materials Technologies LLC
- Method for identifying necking limit strain of metal sheet15 Oct 2024US 12,117,422 B2Jfe Steel Corporation
- Method for evaluating embrittlement of amorphous alloy ribbon and test device for evaluating embrittlement of amorphous alloy ribbon24 Sep 2024US 12,099,039 B2Proterial, Ltd.
- Optimization method and system for hybrid FRP and steel bars24 Sep 2024US 12,099,785 B2Shenzhen University
- Stress-strain relation estimation method and spring-back prediction method, and method for manufacturing press formed part20 Aug 2026US 2026/0243638 A1Jfe Steel Corporation
- Method for inspecting a silicon carbide wafer9 Jul 2026US 2026/0194431 A1LEAP Semiconductor Corp.
- Metal sheet forming limit determination method and forming limit determination system, and computer program11 Jun 2026US 2026/0158605 A1Jfe Steel Corporation
- Press forming fracture judgment method, device, and program, and press formed part manufacturing method26 Feb 2026US 2026/0056101 A1Jfe Steel Corporation
- Method and apparatus of acquiring forming limit of metal sheet4 Dec 2025US 2025/0369846 A1Jfe Steel Corporation
Most cited
By later US patents
- Apparatus for evaluating plane strain stretch formability, and method therefor17US 5,507,189 APohang Iron & Steel Co., Ltd. · 1996
- Method and apparatus for determining the true stress and true strain behavior of a ductile polymer13US 6,267,011 B1Exponent, Inc. · 2001
- Method and apparatus for judging fracture of metal stamped product, program and computer-readable recording medium7US 8,464,591 B2Nippon Steel & Sumitomo Metal Corporation · 2013
- Method and apparatus for characterizing microscale formability of thin sheet materials5US 8,479,589 B2University of Kentucky Research Foundation · 2013
- Method and system for measuring/detecting ice or snow atmospheric accretion on overhead power lines4US 10,451,770 B2Ampacimon S.A. · 2019