C01F 7/42
Preparation of aluminium oxide or hydroxide from metallic aluminium
Official title: Preparation of aluminium oxide or hydroxide from metallic aluminium, e.g. by oxidation
C01F7/42 (Preparation of aluminium oxide or hydroxide from metallic aluminium) appears on 102 US grants and 96 published applications in this corpus.
Search patents in C01F- Granted patents
- 102
- Published applications
- 96
- Assignees
- 86
- Inventors
- 261
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 2 | 1 |
| 2003 | 5 | 3 |
| 2004 | 2 | 5 |
| 2005 | 0 | 3 |
| 2006 | 5 | 1 |
| 2007 | 0 | 2 |
| 2008 | 2 | 3 |
| 2009 | 0 | 1 |
| 2010 | 0 | 5 |
| 2011 | 3 | 3 |
| 2012 | 0 | 3 |
| 2013 | 3 | 3 |
| 2014 | 3 | 2 |
| 2015 | 3 | 6 |
| 2016 | 3 | 5 |
| 2017 | 9 | 4 |
| 2018 | 2 | 2 |
| 2019 | 5 | 4 |
| 2020 | 2 | 5 |
| 2021 | 4 | 3 |
| 2022 | 5 | 6 |
| 2023 | 2 | 7 |
| 2024 | 7 | 5 |
| 2025 | 5 | 7 |
| 2026 | 1 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for manufacturing spherical particle material7 Jul 2026US 12,673,877 B2Admatechs Co., Ltd.
- Metal particles and method for preparation thereof using electroerosion dispersion2 Dec 2025US 12,485,483 B2
- Waste battery treatment method28 Oct 2025US 12,456,767 B2LG Energy Solution, Ltd.
- Method and apparatus for recycling lithium-ion batteries3 Jun 2025US 12,322,769 B2Worcester Polytechnic Institute
- Recovery and recycling of byproducts of activated aluminum22 Apr 2025US 12,280,367 B2Massachusetts Institute of Technology
- High-purity alumina particles and method of producing same, and resin composition for electronic devices and method of producing the same10 Sep 2026US 2026/0265496 A1Admatechs Co., Ltd.
- Process for conversion of energy in the form of process heat and hydrogen9 Jul 2026US 2026/0193081 A1Technische Universität Darmstadt
- Hydrogen and aluminum salt production via aluminum-water reaction18 Jun 2026US 2026/0167486 A1
- Controllable hydrogen production system and controllable hydrogen production method28 May 2026US 2026/0145933 A1
- Metal particles and method for preparation thereof using electroerosion dispersion5 Mar 2026US 2026/0061486 A1
Most cited
By later US patents
- Method of making nanostructured materials142US 5,460,701 ANanophase Technologies Corporation · 1995
- Process for preparaing polyhedral .alpha.-alumina particles97US 5,523,074 ASumitomo Chemical Company, Limited · 1996
- Process for producing ultra-fine ceramic particles84US 4,705,762 AToyota Jidosha Kabushiki Kaisha · 1987
- Nanocrystalline materials74US 5,874,684 ANanophase Technologies Corporation · 1999
- Method and apparatus for hydrogenating hydrocarbon fuels66US 7,326,263 B22008