C01B 21/42
Preparation from nitrates
C01B21/42 (Preparation from nitrates) appears on 11 US grants and 7 published applications in this corpus.
Search patents in C01B- Granted patents
- 11
- Published applications
- 7
- Assignees
- 11
- Inventors
- 32
- Latest grant
- 25 Apr 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 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 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 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 | 0 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 1 |
| 2023 | 1 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Separation and concentration of nitrate from aqueous solutions and gaseous streams25 Apr 2023US 11,634,326 B2Clairion Ltd.
- Method for continuously preparing metal oxides catalyst and apparatus thereof21 Apr 2015US 9,012,351 B2Synfuels China Technology Co., Ltd.
- Method for recovering nitric acid and purifying silver nitrate electrolyte9 Oct 2012US 8,282,903 B2Royal Canadian Mint
- Separation of calcium from metal compounds9 Nov 1999US 5,980,842 ADrinkard Metalox, Inc.
- Process for the manufacture of nitric oxide23 Sep 1997US 5,670,127 AThe BOC Group, Inc.
- Selective treatment of nitrate for brine regeneration23 Oct 2025US 2025/0326641 A1Toxsorb Ltd.
- Separation and concentration of nitrate from aqueous solutions and gaseous streams20 Jan 2022US 2022/0017365 A1Clairion Ltd.
- Separation of a strong acid from its salts21 Oct 2021US 2021/0323821 A1
- Method for Obtaining or Recovering Nitric Acid and Hydrofluoric Acid from Solutions of Stainless Steel Pickling Systems3 Oct 2013US 2013/0259793 A1Key Technologies Industriebau GmbH
- Colorless, non-fuming, hazardless and stable aqua-regia, its preparation method and use in treating medical disorders24 May 2012US 2012/0128795 A1
Most cited
By later US patents
- Recovery of mixed acids from mixed salts25US 4,999,095 AAllied-Signal Inc. · 1991
- Method for continuously preparing metal oxides catalyst and apparatus thereof20US 9,012,351 B2Synfuels China Technology Co., Ltd. · 2015
- Thermal decomposition of metal nitrates16US 4,141,963 ACiba-Geigy Corporation · 1979
- Process for the manufacture of nitric oxide10US 5,670,127 AThe BOC Group, Inc. · 1997
- Recovery of mixed acids from mixed salts6US 5,139,632 AAllied-Signal Inc. · 1992