C01F 7/021
After-treatment of oxides or hydroxides
C01F7/021 (After-treatment of oxides or hydroxides) appears on 304 US grants and 309 published applications in this corpus.
Search patents in C01F- Granted patents
- 304
- Published applications
- 309
- Assignees
- 242
- Inventors
- 888
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 6 | 0 |
| 1980 | 8 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 6 | 0 |
| 1987 | 4 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 8 | 1 |
| 2002 | 9 | 5 |
| 2003 | 2 | 11 |
| 2004 | 1 | 10 |
| 2005 | 5 | 9 |
| 2006 | 5 | 15 |
| 2007 | 2 | 13 |
| 2008 | 5 | 10 |
| 2009 | 4 | 14 |
| 2010 | 9 | 17 |
| 2011 | 11 | 6 |
| 2012 | 6 | 12 |
| 2013 | 8 | 9 |
| 2014 | 8 | 6 |
| 2015 | 7 | 8 |
| 2016 | 7 | 10 |
| 2017 | 12 | 20 |
| 2018 | 15 | 26 |
| 2019 | 14 | 17 |
| 2020 | 15 | 13 |
| 2021 | 13 | 11 |
| 2022 | 7 | 12 |
| 2023 | 6 | 14 |
| 2024 | 6 | 15 |
| 2025 | 11 | 13 |
| 2026 | 11 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Spherical alumina particle mixture, method for producing same, and resin composite composition and resin composite body each containing said spherical alumina particle mixture14 Apr 2026US 12,600,838 B2Nippon Steel Chemical & Material Co., Ltd.
- Improved alpha alumina compositions8 Oct 2026US 2026/0308005 A1CoorsTek, Inc.
- Spherical alumina and supported catalyst, and preparation methods and use thereof17 Sep 2026US 2026/0273511 A1Dalian University of Technology
- Nanocrystalline composite catalyst for alkane dehydrogenation and process for preparation thereof30 Jul 2026US 2026/0216716 A1Indian Oil Corporation Limited
- Spherical alumina particles and method for producing same30 Jul 2026US 2026/0217550 A1Nippon Steel Chemical & Material Co., Ltd.
- Method for producing reduced form of metal oxide23 Jul 2026US 2026/0209886 A1K.K. Sun Metalon
Most cited
By later US patents
- Abrasive grits formed of ceramic containing oxides of aluminum and yttrium, method of making and using the same and products made therewith446US 4,770,671 AMinnesota Mining and Manufacturing Company · 1988
- Method for making abrasive grain using impregnation and abrasive articles148US 6,053,956 A3M Innovative Properties Company · 2000
- Production of alpha alumina131US 5,641,469 ANorton Company · 1997
- Process for the production of spherical shaped bodies based on Al.sub.2 O.sub.3 and optionally SiO.sub.2123US 4,341,663 AKali-Chemie Aktiengesellschaft · 1982
- Method for producing ceramic particles and agglomerates119US 6,261,484 B1The Regents of the University of California · 2001