F25J 3/0276
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)}
F25J3/0276 (Separation of h2/n2 mixtures, i.e. of ammonia synthesis gas) appears on 48 US grants and 43 published applications in this corpus.
Search patents in F25J- Granted patents
- 48
- Published applications
- 43
- Assignees
- 22
- Inventors
- 82
- Latest grant
- 12 Nov 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
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| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
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| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 3 |
| 2006 | 1 | 2 |
| 2007 | 2 | 0 |
| 2008 | 1 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 3 |
| 2011 | 1 | 0 |
| 2012 | 1 | 4 |
| 2013 | 1 | 2 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 1 | 2 |
| 2017 | 0 | 4 |
| 2018 | 5 | 6 |
| 2019 | 6 | 4 |
| 2020 | 0 | 1 |
| 2021 | 2 | 0 |
| 2022 | 1 | 0 |
| 2023 | 0 | 4 |
| 2024 | 4 | 1 |
| 2025 | 0 | 2 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for producing high purity hydrogen12 Nov 2024US 12,140,374 B2Air Products and Chemicals, Inc.
- Method for producing high purity hydrogen3 Sep 2024US 12,077,434 B2Air Products and Chemicals, Inc.
- Process and apparatus for the cryogenic separation of a mixture of carbon monoxide, hydrogen and methane for the production of CH423 Apr 2024US 11,965,694 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for producing high purity hydrogen2 Apr 2024US 11,945,721 B2Air Products and Chemicals, Inc.
- Synthesis of ammonia with internal cooling circuit6 Sep 2022US 11,434,141 B2Linde Aktiengesellschaft
- Process and apparatus for the production of ammonia synthesis gas16 Oct 2025US 2025/0321050 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Effective use of cryogenic separation section in syngas manufacture23 Jan 2025US 2025/0026639 A1Topsoe A/S
- Methods and systems for efficiently and cleanly manufacturing ammonia, ammonium sulfate, nitric acid, ammonium nitrate, or combinations thereof from coal and petcoke products9 May 2024US 2024/0150189 A1Decarbtek Global Corp.
- Method for producing high purity hydrogen28 Sep 2023US 2023/0304733 A1Air Products and Chemicals, Inc.
- Method for producing high purity hydrogen10 Aug 2023US 2023/0249119 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Process for the production of ammonia and the corresponding synthesis gas37US 4,296,085 A1981
- Production of ammonia synthesis gas29US 4,636,334 AFoster Wheeler USA Corporation · 1987
- Gas purification process27US 4,371,381 ACryoplants Limited · 1983
- Argon recovery from partial oxidation based ammonia plant purge gases21US 5,100,447 AThe BOC Group, Inc. · 1992
- Process for producing ammonia and recovering argon using low purity oxygen19US 5,775,128 APraxair Technology, Inc. · 1998