C01G 49/00
Compounds of iron
C01G49/00 (Compounds of iron) appears on 2,420 US grants and 2,374 published applications in this corpus.
Search patents in C01G- Granted patents
- 2,420
- Published applications
- 2,374
- Assignees
- 1,409
- Inventors
- 6,482
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 38 | 0 |
| 1978 | 35 | 0 |
| 1979 | 21 | 0 |
| 1980 | 30 | 0 |
| 1981 | 32 | 0 |
| 1982 | 26 | 0 |
| 1983 | 32 | 0 |
| 1984 | 31 | 0 |
| 1985 | 35 | 0 |
| 1986 | 41 | 0 |
| 1987 | 30 | 0 |
| 1988 | 34 | 0 |
| 1989 | 26 | 0 |
| 1990 | 21 | 0 |
| 1991 | 35 | 0 |
| 1992 | 30 | 0 |
| 1993 | 28 | 0 |
| 1994 | 30 | 0 |
| 1995 | 24 | 0 |
| 1996 | 34 | 0 |
| 1997 | 38 | 0 |
| 1998 | 36 | 0 |
| 1999 | 24 | 0 |
| 2000 | 37 | 0 |
| 2001 | 38 | 11 |
| 2002 | 39 | 54 |
| 2003 | 42 | 62 |
| 2004 | 47 | 67 |
| 2005 | 31 | 54 |
| 2006 | 35 | 66 |
| 2007 | 32 | 63 |
| 2008 | 31 | 86 |
| 2009 | 38 | 75 |
| 2010 | 56 | 98 |
| 2011 | 52 | 103 |
| 2012 | 61 | 88 |
| 2013 | 70 | 85 |
| 2014 | 61 | 94 |
| 2015 | 70 | 130 |
| 2016 | 99 | 120 |
| 2017 | 99 | 91 |
| 2018 | 71 | 132 |
| 2019 | 84 | 113 |
| 2020 | 97 | 108 |
| 2021 | 89 | 112 |
| 2022 | 90 | 116 |
| 2023 | 93 | 112 |
| 2024 | 84 | 144 |
| 2025 | 92 | 109 |
| 2026 | 47 | 81 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01G 49/02Oxides1,007
- C01G 49/0018Mixed oxides or hydroxides784
- C01G 49/009Compounds containing iron, with or without oxygen or hydrogen, and containing two577
- C01G 49/10Halides109
- C01G 49/14Sulfates99
- C01G 49/0009Preparation involving a liquid-liquid extraction, an adsorption or an ion-exchange75
- C01G 49/12Sulfides63
- C01G 49/16Carbonyls9
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Most cited
By later US patents
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- Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions202US 5,306,411 AThe Standard Oil Company · 1994
- Electroactive material for secondary batteries and methods of preparation146US 6,599,662 B1Massachusetts Institute of Technology · 2003
- Very high purity fine powders and methods to produce such powders142US 6,569,397 B12003
- Non-spherical nanopowder derived nanocomposites126US 6,916,872 B2NanoProducts Corporation · 2005