C01B 7/194
Preparation from ammonium fluoride
Official title: {Preparation from ammonium fluoride}
C01B7/194 (Preparation from ammonium fluoride) appears on 13 US grants and 4 published applications in this corpus.
Search patents in C01B- Granted patents
- 13
- Published applications
- 4
- Assignees
- 11
- Inventors
- 22
- Latest grant
- 14 Dec 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing diluted hydrofluoric acid14 Dec 2021US 11,198,609 B2Condias GmbH
- Method for the preparation of anhydrous hydrogen halides, inorganic substances and/or inorganic hydrides by using as reactants inorganic halides and reducing agents16 Sep 2014US 8,834,830 B2Midwest Inorganics LLC
- Method for the production of nitrogen trifluoride21 Jun 2005US 6,908,601 B2The BOC Group, Inc.
- Process for nitrogen trifluoride synthesis10 Jun 1997US 5,637,285 AAir Products and Chemicals, Inc.
- Process for removing fluoride from a wastewater and producing hydrofluoric acid therefrom23 Oct 1990US 4,965,061 AFlorida Recoveries Partnership
- Method for producing diluted hydrofluoric acid31 May 2018US 2018/0148332 A1Condias GmbH
- Method for the preparation of anhydrous hydrogen halides, inorganic substances and/or inorganic hydrides by using as reactants inorganic halides and reducing agents13 Mar 2014US 2014/0070137 A1Midwest Inorganics LLC
- Method and apparatus for the production of nitrogen trifluoride30 Sep 2004US 2004/0191156 A1
- Method and apparatus for the production of nitrogen trifluoride14 Aug 2003US 2003/0152507 A1The BOC Group, Inc.
Most cited
By later US patents
- Process for nitrogen trifluoride synthesis14US 5,637,285 AAir Products and Chemicals, Inc. · 1997
- Recovery of hydrogen fluoride from an aqueous solution containing ammonium fluoride and hydrogen fluoride8US 4,882,134 AIMC Fertilizer, Inc. · 1989
- Production of hydrogen fluoride7US 4,144,315 AGoulding Chemicals Limited · 1979
- Production of hydrogen fluoride6US 4,056,604 A1977
- Process for processing waste solution containing ammonium ions and fluoride ions6US 4,655,929 AMitsubishi Kinzoku Kabushiki Kaisha · 1987