C01F 7/441
By calcination
Official title: by calcination
C01F7/441 (By calcination) appears on 195 US grants and 208 published applications in this corpus.
Search patents in C01F- Granted patents
- 195
- Published applications
- 208
- Assignees
- 130
- Inventors
- 596
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 6 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 2 | 0 |
| 2000 | 8 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 2 | 3 |
| 2004 | 1 | 7 |
| 2005 | 2 | 11 |
| 2006 | 4 | 4 |
| 2007 | 1 | 1 |
| 2008 | 4 | 7 |
| 2009 | 2 | 5 |
| 2010 | 2 | 10 |
| 2011 | 4 | 5 |
| 2012 | 5 | 5 |
| 2013 | 5 | 3 |
| 2014 | 3 | 6 |
| 2015 | 1 | 9 |
| 2016 | 4 | 4 |
| 2017 | 7 | 18 |
| 2018 | 6 | 10 |
| 2019 | 10 | 8 |
| 2020 | 6 | 8 |
| 2021 | 8 | 12 |
| 2022 | 5 | 15 |
| 2023 | 9 | 21 |
| 2024 | 12 | 9 |
| 2025 | 9 | 13 |
| 2026 | 11 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing abrasive particles15 Sep 2026US 12,735,614 B2Tyrolit Schleifmittelwerke Swarovski K.G.
- Process for the preparation of high surface area alpha alumina and the use thereof12 May 2026US 12,623,207 B2Studiengesellschaft Kohle mbH
- Crystalline boehmite materials as precursors for large crystal gamma alumina and low surface area alpha alumina5 May 2026US 12,617,690 B2BASF SE
- Abrasive particles having complex shapes and methods of forming same21 Apr 2026US 12,606,727 B2Saint-Gobain Ceramics & Plastics, Inc.
- Alumina particles, resin composition, molded body, and method for producing alumina particles14 Apr 2026US 12,600,674 B2DIC Corporation
- Abrasive particles having complex shapes and methods of forming same27 Aug 2026US 2026/0250567 A1Saint-Gobain Ceramics & Plastics, Inc.
- Process for producing high purity aluminium materials13 Aug 2026US 2026/0234015 A1HiPurA Pty Ltd
- Calcination Apparatus and Process23 Jul 2026US 2026/0209059 A1Rio Tinto Alcan International Limited
- Low sodium activated alumina materials16 Jul 2026US 2026/0199867 A1BASF SE
- Alumina porous material and its preparation and application25 Jun 2026US 2026/0175210 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Process for durable sol-gel produced alumina-based ceramics, abrasive grain and abrasive products536US 4,744,802 AMinnesota Mining and Manufacturing Company · 1988
- Abrasive material and method for preparing the same483US 4,623,364 ANorton Company · 1986
- Abrasive grits formed of ceramic, impregnation method of making the same and products made therewith176US 5,312,789 AMinnesota Mining and Manufacturing Company · 1994
- Aluminum oxide powders and process155US 4,657,754 ANorton Company · 1987
- Abrasive material and method131US 5,395,407 ANorton Company · 1995