C04B 2235/3272
Iron oxides or oxide forming salts thereof
Official title: Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
C04B2235/3272 (Iron oxides or oxide forming salts thereof) appears on 1,373 US grants and 1,794 published applications in this corpus.
Search patents in C04B- Granted patents
- 1,373
- Published applications
- 1,794
- Assignees
- 786
- Inventors
- 3,640
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 5 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 11 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 12 | 0 |
| 2001 | 7 | 4 |
| 2002 | 14 | 19 |
| 2003 | 18 | 66 |
| 2004 | 33 | 71 |
| 2005 | 39 | 57 |
| 2006 | 49 | 51 |
| 2007 | 28 | 74 |
| 2008 | 33 | 68 |
| 2009 | 42 | 80 |
| 2010 | 58 | 120 |
| 2011 | 62 | 83 |
| 2012 | 70 | 89 |
| 2013 | 77 | 96 |
| 2014 | 64 | 69 |
| 2015 | 70 | 69 |
| 2016 | 73 | 76 |
| 2017 | 68 | 76 |
| 2018 | 72 | 67 |
| 2019 | 52 | 80 |
| 2020 | 58 | 84 |
| 2021 | 52 | 66 |
| 2022 | 66 | 74 |
| 2023 | 50 | 79 |
| 2024 | 46 | 84 |
| 2025 | 56 | 54 |
| 2026 | 37 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- M-type hexaferrite comprising a low dielectric loss ceramic29 Sep 2026US 12,749,604 B2Rogers Corporation
- Synthetic mineral composition, a method of forming a synthetic mineral composition and uses of a synthetic mineral composition15 Sep 2026US 12,735,360 B2Sibelco Nederland N.V.
- Ceramic material of ceramic electrode for tumor treating fields and preparation method thereof15 Sep 2026US 12,735,361 B2Hebei Puni Medical Technology Co., Ltd
- Batch for the production of a coarse ceramic refractory basic product, such product and method for its production, lining of an industrial furnace and industrial furnace25 Aug 2026US 12,715,815 B2Refratechnik Holding GmbH
- High-zirconia electro-fused cast refractory material25 Aug 2026US 12,715,817 B2Saint-Gobain TM K.K.
- Dielectric ceramic, method of preparing the same, and multilayer ceramic capacitor including the same8 Oct 2026US 2026/0311933 A1Samsung Electro-Mechanics Co., Ltd.
- Self-assembled soft magnetic ferrite nanocomposite materials and passive components and methods of making same1 Oct 2026US 2026/0296983 A1University of Pittsburgh—Of the Commonwealth System of Higher Education
- Hearth mixture for disposing on the hearth bottom of an electric arc furnace, use of a hearth mixture for disposing on the hearth bottom of an electric arc furnace, electric arc furnace, method for disposing a hearth mixture on the hearth bottom of an electric arc furnace and use of magnesia spinel used in a lining of a cement rotary kiln24 Sep 2026US 2026/0287256 A1Refractory Intellectual Property GmbH & Co.KG
- Air terminal coating17 Sep 2026US 2026/0275484 A1Lightning Protection International Pty Ltd
- Ceramic particles for use in a solar power tower17 Sep 2026US 2026/0276244 A1Carbo Ceramics Inc.
Most cited
By later US patents
- Lithium ion-conductive solid electrolyte containing lithium titanium phosphate169US 4,985,317 AJapan Synthetic Rubber Co., Ltd. · 1991
- Alumina-zirconia abrasive165US 4,457,767 ANorton Company · 1984
- Ceramic aggregate particles158US 6,881,483 B23M Innovative Properties Company · 2005
- Polycrystalline diamond compact (PDC) cutting element having multiple catalytic elements156US 7,635,035 B1US Synthetic Corporation · 2009
- Very high purity fine powders and methods to produce such powders142US 6,569,397 B12003