F25J 2220/52
Separating high boiling, i.e. less volatile components from oxygen
Official title: Separating high boiling, i.e. less volatile components from oxygen, e.g. Kr, Xe, Hydrocarbons, Nitrous oxides, O3
F25J2220/52 (Separating high boiling, i.e. less volatile components from oxygen) appears on 29 US grants and 9 published applications in this corpus.
Search patents in F25J- Granted patents
- 29
- Published applications
- 9
- Assignees
- 15
- Inventors
- 40
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 1 | 1 |
| 2020 | 1 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 0 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air separation unit and air separation method25 Aug 2026US 12,716,651 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- High-purity oxygen production system23 Jan 2024US 11,879,685 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Recovery of krypton and xenon from liquid oxygen4 Oct 2022US 11,460,246 B2Air Products and Chemicals, Inc.
- System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit26 May 2020US 10,663,224 B2Praxair Technology, Inc.
- Method and device for discharging components that are less volatile than oxygen from an air separation plant25 Jun 2019US 10,330,383 B2Linde Aktiengesellschaft
- Air separation unit and air separation method15 Feb 2024US 2024/0053097 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for cryogenic separation of air with mixed gas turbine9 Nov 2023US 2023/0358468 A1Linde Aktiengesellschaft
- Recovery of Krypton and Xenon from Liquid Oxygen24 Jun 2021US 2021/0190422 A1Air Products and Chemicals, Inc.
- High-purity oxygen production system18 Mar 2021US 2021/0080171 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for enhanced recovery of argon and oxygen from a nitrogen producing cryogenic air separation unit14 May 2020US 2020/0149806 A1
Most cited
By later US patents
- Nitrogen generator cycle30US 4,400,188 AAir Products and Chemicals, Inc. · 1983
- Process to produce ultrahigh purity oxygen27US 4,560,397 AUnion Carbide Corporation · 1985
- Purification of oxygen by cryogenic adsorption22US 5,425,240 AThe BOC Group, Inc. · 1995
- Cryogenic production of krypton and xenon from air19US 5,122,173 AAir Products and Chemicals, Inc. · 1992
- Process for producing krypton and xenon13US 4,421,536 ANippon Sanso Corporation · 1983