C01D 5/04
Preparation of sulfates with the aid of sulfurous acid or sulfites
Official title: Preparation of sulfates with the aid of sulfurous acid or sulfites, e.g. Hargreaves process {(pyrosulfites or metabisulfites C01D5/145)}
C01D5/04 (Preparation of sulfates with the aid of sulfurous acid or sulfites) appears on 10 US grants and 9 published applications in this corpus.
Search patents in C01D- Granted patents
- 10
- Published applications
- 9
- Assignees
- 9
- Inventors
- 17
- Latest grant
- 15 Sep 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 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 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 3 | 2 |
| 2020 | 1 | 1 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing potassium sulfate from potassium chloride and sulfuric acid15 Sep 2020US 10,773,968 B2Veolia Water Technologies, Inc.
- Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment24 Dec 2019US 10,513,714 B2Iogen Corporation
- Process for treating lignocellulosic feedstock comprising wet oxidation24 Sep 2019US 10,421,667 B2Iogen Corporation
- Method of producing high-purity lithium carbonate and barium sulfate from discarded lithium secondary batteries27 Aug 2019US 10,392,258 B2KANGWON NATIONAL UNIVERSITY University-Industry Cooperation Foundation
- Recovery of inorganic salt during processing of lignocellulosic feedstocks16 Dec 2014US 8,911,979 B2Iogen Energy Corporation
- Electrochemical production of alkali metal hydroxides and sulfuric acid from battery manufacturing and recycling outlet streams11 Apr 2024US 2024/0120567 A1Redwood Materials, Inc.
- Method for producing potassium sulfate from potassium chloride and sulfuric acid5 Mar 2020US 2020/0071176 A1Veolia Water Technologies, Inc.
- Method of producing high-purity lithium carbonate and barium sulfate from discarded lithium secondary batteries16 May 2019US 2019/0144294 A1KANGWON NATIONAL UNIVERSITY University-Industry Cooperation Foundation
- Lignocellulosic conversion process comprising sulfur dioxide and/or sulfurous acid pretreatment11 Apr 2019US 2019/0106718 A1Iogen Corporation
- Process for treating lignocellulosic feedstock comprising wet oxidation1 Feb 2018US 2018/0029896 A1Iogen Corporation
Most cited
By later US patents
- Recovery of inorganic salt during processing of lignocellulosic feedstocks52US 7,585,652 B2Iogen Energy Corporation · 2009
- Method of producing high-purity lithium carbonate and barium sulfate from discarded lithium secondary batteries17US 10,392,258 B2KANGWON NATIONAL UNIVERSITY University-Industry Cooperation Foundation · 2019
- Recovery of inorganic salt during processing of lignocellulosic feedstocks17US 8,247,203 B2Iogen Energy Corporation · 2012
- Method for carrying out air oxidation and for adding fine bubbles to a liquid13US 4,152,409 ADowa Mining Co., Ltd. · 1979
- Process for treating lignocellulosic feedstock comprising wet oxidation9US 10,421,667 B2Iogen Corporation · 2019