C04B 2237/406
Iron
Official title: Iron, e.g. steel
C04B2237/406 (Iron) appears on 357 US grants and 183 published applications in this corpus.
Search patents in C04B- Granted patents
- 357
- Published applications
- 183
- Assignees
- 224
- Inventors
- 772
- Latest grant
- 27 Jan 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 17 | 0 |
| 1987 | 21 | 0 |
| 1988 | 17 | 0 |
| 1989 | 15 | 0 |
| 1990 | 20 | 0 |
| 1991 | 26 | 0 |
| 1992 | 23 | 0 |
| 1993 | 9 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 7 | 0 |
| 2000 | 3 | 0 |
| 2001 | 8 | 5 |
| 2002 | 7 | 9 |
| 2003 | 13 | 8 |
| 2004 | 4 | 9 |
| 2005 | 5 | 2 |
| 2006 | 4 | 1 |
| 2007 | 3 | 5 |
| 2008 | 1 | 5 |
| 2009 | 3 | 7 |
| 2010 | 4 | 11 |
| 2011 | 2 | 5 |
| 2012 | 8 | 18 |
| 2013 | 5 | 8 |
| 2014 | 6 | 5 |
| 2015 | 8 | 6 |
| 2016 | 7 | 13 |
| 2017 | 3 | 14 |
| 2018 | 7 | 7 |
| 2019 | 9 | 9 |
| 2020 | 8 | 3 |
| 2021 | 5 | 4 |
| 2022 | 3 | 7 |
| 2023 | 3 | 4 |
| 2024 | 4 | 9 |
| 2025 | 7 | 7 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processing apparatuses and methods of using27 Jan 2026US 12,533,869 B2QuantumScape Battery, Inc.
- Method for manufacturing printed circuit board6 Jan 2026US 12,520,435 B2Fj Composite Materials Co., Ltd.
- Susceptor and method of manufacturing the same23 Dec 2025US 12,506,025 B2Semes Co., Ltd.
- Electrostatic chuck and method of manufacturing the same30 Sep 2025US 12,431,380 B2Temnest Inc.
- Substrate structures and methods of manufacture9 Sep 2025US 12,414,238 B2Semiconductor Components Industries, LLC
- Processing apparatuses and methods of using13 Aug 2026US 2026/0233495 A1QuantumScape Battery, Inc.
- Processing apparatuses and methods of using23 Apr 2026US 2026/0109138 A1QuantumScape Battery, Inc.
- Joined solid production method11 Sep 2025US 2025/0281977 A1K.K. Sun Metalon
- Ruhrstahl-heraeus snorkel design21 Aug 2025US 2025/0263808 A1HarbisonWalker International Holdings, Inc.
- Processing apparatuses and methods of using24 Jul 2025US 2025/0236097 A1Quantumspace Battery, Inc.
Most cited
By later US patents
- Functionally stepped, resistive ceramic163US 5,880,439 APhilip Morris Incorporated · 1999
- Multilayer coated abrasive element for bonding to a backing162US 5,049,164 ANorton Company · 1991
- Composite materials156US 4,055,451 A1977
- Composite material bonded by an amorphous metal, and preparation thereof152US 4,621,031 ADresser Industries, Inc. · 1986
- Brazed thermally-stable polycrystalline diamond compact workpieces and their fabrication143US 4,899,922 AGeneral Electric Company · 1990