C01F 7/38
Preparation of aluminium oxide by thermal reduction of aluminous minerals
C01F7/38 (Preparation of aluminium oxide by thermal reduction of aluminous minerals) appears on 11 US grants and 6 published applications in this corpus.
Search patents in C01F- Granted patents
- 11
- Published applications
- 6
- Assignees
- 14
- Inventors
- 44
- Latest grant
- 3 Sep 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
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| 1980 | 1 | 0 |
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| 1992 | 1 | 0 |
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| 1995 | 1 | 0 |
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| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
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| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
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| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Sintered abrasive particles, method of making the same, and abrasive articles including the same3 Sep 2019US 10,400,146 B23M Innovative Properties Company
- Titanium oxide-containing aluminum oxide particles based on corundum melted in an electric arc furnace from calcined alumina, and a method for the production thereof20 Oct 2015US 9,163,128 B2Center for Abrasives and Refractories Research & Development C.A.R.R.D. GmbH
- Extraction process for reactive metal oxides16 Sep 2014US 8,834,600 B2University of Leeds
- Phase formation of oxygen reduced valve metal oxides and granulation methods2 Feb 2010US 7,655,214 B2Cabot Corporation
- Process for producing spherical metal-oxide powder particles30 Nov 1999US 5,994,252 ARW silicium GmbH
- Sintered abrasive particles, method of making the same, and abrasive articles including the same7 Nov 2019US 2019/0338172 A13M Innovative Properties Company
- Sintered abrasive particles, method of making the same, and abrasive articles including the same10 Mar 2016US 2016/0068729 A13M Innovative Properties Company
- Titanium Oxide-Containing Aluminum Oxide Particles Based on Corundum Melted in an Electric Arc Furnace from Calcined Alumina, and a Method for the Production Thereof25 Jun 2015US 2015/0175769 A1Center for Abrasives and Refratories Research and Development - C.A.R.R.D. GmbH
- Process for obtaining nanocrystalline corundum from natural or synthetic alums18 Jul 2013US 2013/0183527 A1Universitat De Valencia
- Extraction process for reactive metal oxides17 Dec 2009US 2009/0311154 A1Urquhart-Dykes & Lord
Most cited
By later US patents
- Spherical metal-oxide powder particles and process for their manufacture39US 5,856,254 AVAW silizium GmbH · 1999
- Process for recovering soda and alumina values from red mud18US 4,045,537 AReynolds Metals Company · 1977
- Method for manufacturing fine-grained silicon monoxide13US 5,096,685 AKawasaki Steel Corporation · 1992
- In situ production of silicon carbide-containing ceramic composite powders11US 5,455,212 AThe University of British Columbia · 1995
- Phase formation of oxygen reduced valve metal oxides and granulation methods8US 7,655,214 B2Cabot Corporation · 2010