F25J 2210/20
H2/n2 mixture, i.e. synthesis gas for or purge gas from ammonia synthesis
Official title: H2/N2 mixture, i.e. synthesis gas for or purge gas from ammonia synthesis
F25J2210/20 (H2/n2 mixture, i.e. synthesis gas for or purge gas from ammonia synthesis) appears on 49 US grants and 35 published applications in this corpus.
Search patents in F25J- Granted patents
- 49
- Published applications
- 35
- Assignees
- 25
- Inventors
- 77
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 4 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 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 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 0 |
| 2012 | 1 | 5 |
| 2013 | 1 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 3 |
| 2017 | 1 | 4 |
| 2018 | 5 | 6 |
| 2019 | 5 | 1 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for separating hydrogen and nitrogen from cracked ammonia17 Feb 2026US 12,552,668 B2L'Air Liquide, Societe Anonyme Pour l'Etude et l'Exploitation des Procedes Claude Georges
- System and method for rare gas recovery4 May 2021US 10,995,982 B2Praxair Technology, Inc.
- Plant and process for ammonia production with cryogenic purification, and related method of revamping24 Dec 2019US 10,514,203 B2Casale SA
- System and method for argon recovery from a feed stream comprising hydrogen, methane, nitrogen and argon4 Jun 2019US 10,309,720 B2Praxair Technology, Inc.
- System and method for enhanced argon recovery from a feed stream comprising hydrogen, methane, nitrogen and argon4 Jun 2019US 10,309,721 B2Praxair Technology, Inc.
- Process and Apparatus for Cracking Ammonia25 Sep 2025US 2025/0296836 A1Air Products and Chemicals, Inc.
- Cryogenic Neon Purification System and Method2 Jan 2025US 2025/0003677 A1Chart Energy & Chemicals, Inc.
- Helium separation and recovery process17 Oct 2024US 2024/0343578 A1Arjae Design Solutions Ltd.
- Method for separating hydrogen and nitrogen from cracked ammonia27 Jun 2024US 2024/0208813 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for recycling argon7 Oct 2021US 2021/0310733 A1Messer Group GmbH
Most cited
By later US patents
- Heat exchanger with rectification effect51US 3,992,168 AKobe Steel, Ltd. · 1976
- Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic separating means42US 4,687,498 AThe BOC Group, Inc. · 1987
- Process for the production of ammonia and the corresponding synthesis gas37US 4,296,085 A1981
- Process for purification of argon from oxygen35US 3,996,028 A1976
- Production of ammonia synthesis gas29US 4,636,334 AFoster Wheeler USA Corporation · 1987