F25J 3/068
Separation of h2/n2 mixtures, i.e. of ammonia synthesis gas
Official title: {separation of H2/N2 mixtures, i.e. of ammonia synthesis gas (in general C01B3/00)}
F25J3/068 (Separation of h2/n2 mixtures, i.e. of ammonia synthesis gas) appears on 7 US grants and 2 published applications in this corpus.
Search patents in F25J- Granted patents
- 7
- Published applications
- 2
- Assignees
- 6
- Inventors
- 9
- Latest grant
- 7 Aug 2018
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 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 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydrogen and nitrogen recovery from ammonia purge gas7 Aug 2018US 10,040,691 B2Casale SA
- Moderate excess nitrogen Braun Purifier.TM. process and method for retrofitting non-Braun Purifier.TM. ammonia plants10 Aug 1999US 5,935,544 ABrown & Root, Inc.
- Production of ammonia synthesis gas13 Jan 1987US 4,636,334 AFoster Wheeler USA Corporation
- Recovery of hydrogen from ammonia synthesis purge gas19 Apr 1983US 4,380,461 APetrocarbon Developments Limited
- Treatment of ammonia synthesis purge gas26 Jan 1982US 4,312,851 A
Most cited
By later US patents
- Production of ammonia synthesis gas29US 4,636,334 AFoster Wheeler USA Corporation · 1987
- Treatment of ammonia synthesis purge gas16US 4,312,851 A1982
- Moderate excess nitrogen Braun Purifier.TM. process and method for retrofitting non-Braun Purifier.TM. ammonia plants16US 5,935,544 ABrown & Root, Inc. · 1999
- Treatment of ammonia synthesis purge gas12US 4,058,589 APetrocarbon Developments Limited · 1977
- Treatment of ammonia synthesis purge gas9US 4,255,406 APetrocarbon Developments Limited · 1981