C01F 7/32
Thermal decomposition of sulfates including complex sulfates
Official title: Thermal decomposition of sulfates including complex sulfates, e.g. alums
C01F7/32 (Thermal decomposition of sulfates including complex sulfates) appears on 25 US grants and 5 published applications in this corpus.
Search patents in C01F- Granted patents
- 25
- Published applications
- 5
- Assignees
- 19
- Inventors
- 54
- Latest grant
- 5 Sep 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 1 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- High purity aluminum oxide via electrodialysis5 Sep 2023US 11,746,021 B2Nextchem S.P.A.
- α-alumina particles and method for manufacturing the same28 Mar 2017US 9,604,852 B2DIC Corporation
- Silicon tetrafluoride byproduct separation process1 Mar 2011US 7,897,125 B1
- .alpha.-alumina powder and process for producing the same12 Dec 2000US 6,159,441 ASumitomo Chemical Company, Limited
- .alpha.-alumina powder and process for producing the same10 Aug 1999US 5,935,550 ASumitomo Chemical Company, Limited
- A method for the preparation of alumina13 Aug 2026US 2026/0234017 A1Playa One Pty Ltd
- High purity aluminum oxide via electrodialysis22 Oct 2020US 2020/0331769 A1Nextchem S.P.A.
- Alpha-alumina particles and method for manufacturing the same27 Aug 2015US 2015/0239746 A1DIC Corporation
- Process for obtaining nanocrystalline corundum from natural or synthetic alums18 Jul 2013US 2013/0183527 A1Universitat De Valencia
- Silicon tetrafluoride byproduct separation process17 Feb 2011US 2011/0038778 A1
Most cited
By later US patents
- Heat resistant transition alumina and process for producing the same24US 5,155,085 ASumitomo Chemical Company, Limited · 1992
- .alpha.-alumina powder and process for producing the same19US 5,935,550 ASumitomo Chemical Company, Limited · 1999
- Process for reducing the iron15US 4,530,819 AMecseki Ercbanyaszati Vallalat · 1985
- High surface area metal oxide foams and method of producing the same13US 4,937,062 ACabot Corporation · 1990
- Process for production of transition alumina9US 5,508,016 ASumitomo Chemical Company, Limited · 1996