F25J 3/04739
In combination with an auxiliary pure argon column
Official title: {in combination with an auxiliary pure argon column}
F25J3/04739 (In combination with an auxiliary pure argon column) appears on 20 US grants and 10 published applications in this corpus.
Search patents in F25J- Granted patents
- 20
- Published applications
- 10
- Assignees
- 7
- Inventors
- 39
- Latest grant
- 9 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
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| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
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| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 5 |
| 2018 | 6 | 2 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Apparatus and process for liquefying gases9 Dec 2025US 12,492,864 B1
- Apparatus and process for liquefying gases21 Dec 2021US 11,204,196 B2
- Apparatus and process for liquefying gases1 Dec 2020US 10,852,061 B2
- Method ad apparatus for argon recovery in a cryogenic air separation unit integrated with a pressure swing adsorption4 Dec 2018US 10,145,609 B2Praxair Technology, Inc.
- Method and apparatus for argon rejection and recovery4 Sep 2018US 10,066,871 B2Praxair Technology, Inc.
- Apparatus and Process for Liquefying Gases3 Jun 2021US 2021/0164729 A1
- Apparatus and Process for Liquefying Gases22 Nov 2018US 2018/0335256 A1
- Method ad apparatus for argon recovery in a cryogenic air separation unit integrated with a pressure swing adsorption11 Oct 2018US 2018/0292130 A1Praxair Technology, Inc.
- Method and apparatus for argon rejection and recovery2 Feb 2017US 2017/0030638 A1Praxair Technology, Inc.
- Method and apparatus for argon recovery in a cryogenic air separation unit integrated with a pressure swing adsorption system2 Feb 2017US 2017/0030639 A1Praxair Technology, Inc.
Most cited
By later US patents
- Process for removing oxygen from crude argon50US 5,035,726 AAir Products and Chemicals, Inc. · 1991
- Purification of crude argon47US 4,935,044 ALinde Aktiengesellschaft · 1990
- Process for the purification of the inert gases34US 5,204,075 AThe BOC Group, Inc. · 1993
- Combined cryogenic distillation and PSA for argon production19US 7,501,009 B2Air Products and Chemicals, Inc. · 2009
- Production of high purity argon17US 4,983,194 AAir Products and Chemicals, Inc. · 1991