C01B 17/905
Removal of organic impurities
Official title: {Removal of organic impurities}
C01B17/905 (Removal of organic impurities) appears on 32 US grants and 24 published applications in this corpus.
Search patents in C01B- Granted patents
- 32
- Published applications
- 24
- Assignees
- 26
- Inventors
- 90
- Latest grant
- 21 Dec 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 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 | 1 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 3 |
| 2008 | 2 | 2 |
| 2009 | 0 | 0 |
| 2010 | 3 | 2 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 2 | 2 |
| 2019 | 3 | 1 |
| 2020 | 1 | 2 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Acid recovery from acid-rich solutions21 Dec 2021US 11,203,527 B2Melodea Ltd.
- Reduction of content of carboxylic acids and derivatives thereof in oleum, disulfuric acid or concentrated sulfuric acid7 Sep 2021US 11,111,201 B2Solvay SA
- Acid recovery from acid-rich solutions4 Aug 2020US 10,730,750 B2Melodea Ltd.
- Sulfonation process1 Oct 2019US 10,428,163 B2Rohm and Haas Company
- Regeneration of acidic ionic liquid catalysts27 Aug 2019US 10,391,481 B2Chevron U.S.A.Inc.
- Process for concentrating diluted sulfuric acid21 Dec 2023US 2023/0406704 A1BASF SE
- Acid recovery from acid-rich solutions19 Nov 2020US 2020/0361771 A1Melodea Ltd.
- Reduction of content of carboxylic acids and derivatives thereof in oleum, disulfuric acid or concentrated sulfuric acid16 Jul 2020US 2020/0223778 A1Solvay SA
- Acid recovery from acid-rich solutions25 Jul 2019US 2019/0225492 A1Melodea Ltd.
- Sulfonation process29 Mar 2018US 2018/0086863 A1Rohm and Haas Company
Most cited
By later US patents
- Regeneration of acidic catalysts31US 7,732,363 B2Chevron U.S.A.Inc. · 2010
- Method for the manufacture of an ammonium sulfate composition25US 8,496,905 B2Nutrinova Nutrition Specialties & Food Ingredients GmbH · 2013
- Method and apparatus for the oxidation of organic material present in concentrated sulfuric acid24US 4,085,016 ANoranda Mines Limited · 1978
- Hall-effect sensor having integrally molded frame with printed conductor thereon24US 5,093,617 AMitsubishi Denki Kabushiki Kaisha · 1992
- Process for purification and concentration of sulfuric acid17US 5,275,701 AAir Products and Chemicals, Inc. · 1994