C01B 21/1418
By catalytic reduction of nitrogen oxides or nitrates with hydrogen
Official title: {by catalytic reduction of nitrogen oxides or nitrates with hydrogen}
C01B21/1418 (By catalytic reduction of nitrogen oxides or nitrates with hydrogen) appears on 66 US grants and 23 published applications in this corpus.
Search patents in C01B- Granted patents
- 66
- Published applications
- 23
- Assignees
- 16
- Inventors
- 115
- Latest grant
- 25 Nov 2014
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 0 | 0 |
| 1996 | 4 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 2 | 4 |
| 2005 | 1 | 2 |
| 2006 | 3 | 1 |
| 2007 | 1 | 5 |
| 2008 | 3 | 3 |
| 2009 | 3 | 2 |
| 2010 | 2 | 1 |
| 2011 | 1 | 2 |
| 2012 | 1 | 1 |
| 2013 | 1 | 1 |
| 2014 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for removing NO and N2O from gas mixtures25 Nov 2014US 8,894,960 B2BASF SE
- Process for working up an exhaust gas from a system for producing hydroxylamine or hydroxylammonium salts25 Mar 2014US 8,679,436 B2BASF SE
- Method for manufacturing hydroxylamine1 Oct 2013US 8,545,789 B2China Petrochemical Development Corporation
- Method for manufacturing hydroxylamine10 Apr 2012US 8,153,092 B2China Petrochemical Development Corporation
- Method for manufacturing hydroxylamine22 Feb 2011US 7,892,512 B2China Petrochemical Development Corporation
- Process for working up an exhaust gas from a system for producing hydroxylamine or hydroxylammonnium salts18 Jul 2013US 2013/0183222 A1BASF SE
- Destruction of ammonium ions24 May 2012US 2012/0128569 A1
- Method for manufacturing hydroxylamine14 Jul 2011US 2011/0171103 A1China Petrochemical Development Corporation
- Regeneration of hydrogenation catalysts based on a platinum metal13 Jan 2011US 2011/0008238 A1BASF SE
- Process for removing no and n2o from gas mixtures10 Jun 2010US 2010/0143226 A1BASF SE
Most cited
By later US patents
- Process for preparing noble metal catalysts35US 4,052,336 AStamicarbon B. V. · 1977
- Platinum-on-graphite catalysts and the use thereof24US 5,120,699 ABASF SE · 1992
- Removal of nitrous oxide from gases containing hydrogen, nitric oxide and nitrous oxide16US 4,507,271 ABASF SE · 1985
- Preparation of hydroxylammonium salts13US 4,889,704 ABASF SE · 1989
- Recycle process for the preparation and processing of a hydroxylammonium salt solution9US 3,940,442 AStamicarbon B. V. · 1976