C01B 17/62
Methods of preparing sulfites in general
Official title: Methods of preparing sulfites in general (particular individual sulfites, see the relevant groups of subclasses C01B - C01G, according to the cation)
C01B17/62 (Methods of preparing sulfites in general) appears on 19 US grants and 10 published applications in this corpus.
Search patents in C01B- Granted patents
- 19
- Published applications
- 10
- Assignees
- 20
- Inventors
- 41
- Latest grant
- 18 Oct 2022
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 1 | 1 |
| 2011 | 0 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Process and system for producing sodium hydrosulfite crystals18 Oct 2022US 11,472,704 B2Silox Canada Inc.
- Sulfur dioxide scrubbing system and process for producing potassium products12 Nov 2019US 10,472,238 B2Tessenderio Kerley, Inc.
- Sulfur dioxide scrubbing system and process for producing potassium products26 Jun 2018US 10,005,667 B2Tessenderlo Kerley, Inc.
- Thiosulfate removal methods and systems13 Mar 2012US 8,133,399 B2ConocoPhillips Company
- Bisulfite conversion reagent9 Feb 2010US 7,658,288 B2Applied Biosystems, LLC
- Process and system for producing sodium hydrosulfite crystals12 May 2022US 2022/0144635 A1Hydro Technologies (Canada) Inc.
- Sulfur dioxide scrubbing system and process for producing potassium products6 Sep 2018US 2018/0251375 A1Tessenderlo Kerley, Inc.
- Sulfur dioxide scrubbing system and process for producing potassium products6 Jul 2017US 2017/0190575 A1Tessenderlo Kerley, Inc.
- Thiosulfate removal methods and systems17 May 2012US 2012/0118817 A1ConocoPhillips Company
- Thiosulfate removal methods and systems8 Sep 2011US 2011/0215056 A1ConocoPhillips Company
Most cited
By later US patents
- Method for protecting an ion-exchange resin from chemical poisoning22US 4,296,075 AMobil Oil Corporation · 1981
- Removal of hydrogen sulfide from fluid streams with minimum production of solids17US 4,830,838 AThe Dow Chemical Company · 1989
- Process for dry scrubbing of flue gas16US 4,324,770 APeabody Process Systems, Inc. · 1982
- System for dry scrubbing of flue gas12US 4,446,109 APeabody Process Systems, Inc. · 1984
- Method for dry removal of sulfur dioxide from furnace flue, coal and other gases9US 3,983,218 A1976