F25J 3/066
Separation of nitrogen
Official title: {separation of nitrogen (from air F25J3/04, production of nitrogen in general C01B21/00)}
F25J3/066 (Separation of nitrogen) appears on 49 US grants and 61 published applications in this corpus.
Search patents in F25J- Granted patents
- 49
- Published applications
- 61
- Assignees
- 40
- Inventors
- 146
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 3 |
| 2004 | 3 | 3 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 2 | 2 |
| 2013 | 1 | 4 |
| 2014 | 2 | 0 |
| 2015 | 2 | 2 |
| 2016 | 2 | 5 |
| 2017 | 1 | 2 |
| 2018 | 1 | 10 |
| 2019 | 2 | 4 |
| 2020 | 3 | 2 |
| 2021 | 1 | 4 |
| 2022 | 3 | 2 |
| 2023 | 1 | 3 |
| 2024 | 1 | 1 |
| 2025 | 3 | 2 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and apparatus for separating carbon dioxide from a residual gas in a fluidised bed catalytic cracking plant (FCC)17 Feb 2026US 12,551,840 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- 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
- Systems and methods for removing nitrogen during liquefaction of natural gas28 Oct 2025US 12,455,114 B2ConocoPhillips Company
- System and method for the processing of LNG28 Jan 2025US 12,209,801 B2Petroliam Nasional Berhad (Petronas)
- Cryogen chamber with adsorber7 Jan 2025US 12,186,699 B1Lunar Helium-3 Mining, LLC
- Simultaneous carbon dioxide and hydrogen recovery from the tail gas stream of a sulfur recovery unit19 Feb 2026US 2026/0048362 A1Saudi Arabian Oil Company
- Containerized Gas Processing System with Evacuated Processing Compartment19 Feb 2026US 2026/0049763 A1
- Systems and methods for removing nitrogen during liquefaction of natural gas5 Feb 2026US 2026/0036367 A1ConocoPhillips Company
- Process and Apparatus for Cracking Ammonia25 Sep 2025US 2025/0296836 A1Air Products and Chemicals, Inc.
- CO2 Separation Systems and Methods6 Feb 2025US 2025/0044022 A1Carbonquest, Inc.
Most cited
By later US patents
- Process and apparatus for producing liquid carbon dioxide93US 5,233,837 AEnerfex, Inc. · 1993
- Integrated processing of natural gas into liquid products87US 6,743,829 B2BP Corporation North America Inc. · 2004
- Method and apparatus for removing pollutants from flue gas84US 5,467,722 A1995
- Integrated processing of natural gas into liquid products84US 7,168,265 B2BP Corporation North America Inc. · 2007
- Cryogenic recovery of LPG from natural gas45US 4,430,103 APhillips Petroleum Company · 1984