F25J 3/048
Argon recovery
Official title: {Argon recovery}
F25J3/048 (Argon recovery) appears on 46 US grants and 46 published applications in this corpus.
Search patents in F25J- Granted patents
- 46
- Published applications
- 46
- Assignees
- 14
- Inventors
- 105
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 1 |
| 2003 | 3 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 0 | 1 |
| 2016 | 1 | 5 |
| 2017 | 2 | 2 |
| 2018 | 2 | 2 |
| 2019 | 3 | 5 |
| 2020 | 4 | 5 |
| 2021 | 2 | 3 |
| 2022 | 3 | 6 |
| 2023 | 1 | 1 |
| 2024 | 3 | 4 |
| 2025 | 3 | 3 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air separation apparatus7 Apr 2026US 12,595,961 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for improved recovery of argon12 Aug 2025US 12,385,692 B2Air Products and Chemicals, Inc.
- Method, device, and storage medium for measuring nitrogen content15 Jul 2025US 12,360,092 B2Shanghai Lifengas Co., Ltd
- Method for starting up an argon separation column of an apparatus for air separation by cryogenic distillation and unit for implementing the method27 May 2025US 12,313,336 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation device and air separation method22 Oct 2024US 12,123,647 B2Taiyo Nippon Sanso Corporation
- Process and apparatus for producing argon by cryogenic air separation23 Jul 2026US 2026/0210624 A1
- Method for cryogenic separation of air, and air separation plant16 Jul 2026US 2026/0202125 A1Linde Aktiengesellschaft
- System and method for optimizing production of argon in a cryogenic air separation unit5 Feb 2026US 2026/0035246 A1
- Apparatus and Process for Improved Argon Recovery9 Oct 2025US 2025/0314424 A1Air Products and Chemicals, Inc.
- Cryogenic air rectification system, control unit, air separation unit and method of cryogenically separating air8 May 2025US 2025/0146746 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Process and apparatus for controlling argon column feedstreams20US 4,784,677 AThe BOC Group, Inc. · 1988
- Process for maximizing the recovery of argon from an air separation system at high argon recovery rates20US 5,313,800 APraxair Technology, Inc. · 1994
- Control method to maximize argon recovery from cryogenic air separation units18US 4,842,625 AAir Products and Chemicals, Inc. · 1989
- Method for operating a cryogenic plant18US 6,666,049 B1Praxair Technology, Inc. · 2003
- Process for restarting an auxilliary column for argon/oxygen separation by distillation and corresponding installation16US 5,505,051 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1996