F25J 2220/50
Separating low boiling, i.e. more volatile components from oxygen
Official title: Separating low boiling, i.e. more volatile components from oxygen, e.g. N2, Ar
F25J2220/50 (Separating low boiling, i.e. more volatile components from oxygen) appears on 33 US grants and 24 published applications in this corpus.
Search patents in F25J- Granted patents
- 33
- Published applications
- 24
- Assignees
- 19
- Inventors
- 67
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 1 |
| 2003 | 2 | 0 |
| 2004 | 4 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 2 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 2 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 2 | 0 |
| 2020 | 1 | 1 |
| 2021 | 2 | 2 |
| 2022 | 0 | 0 |
| 2023 | 0 | 3 |
| 2024 | 1 | 4 |
| 2025 | 1 | 1 |
| 2026 | 1 | 1 |
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
- Device and method for recovering by-product oxygen of hydrogen production from electrolyzed water by low-temperature method5 Aug 2025US 12,378,686 B2Hangzhou Oxygen Plant Group Co., Ltd.
- 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
- Nitrogen production system for producing nitrogen with different purities and nitrogen production process thereof19 Oct 2021US 11,150,016 B2L'Air Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude
- Process for argon and nitrogen production31 Aug 2021US 11,104,576 B2Casale SA
- System and method for production of ultra-high purity oxygen5 Feb 2026US 2026/0035243 A1
- Process and plant for providing a nitrogen product, an oxygen product and a hydrogen product28 Aug 2025US 2025/0271208 A1Linde Aktiengesellschaft
- Apparatus and Process for Oxygen Production14 Nov 2024US 2024/0375037 A1Air Products and Chemicals, Inc.
- Ultra-high-purity oxygen production method and ultra-high-purity oxygen production apparatus24 Oct 2024US 2024/0353173 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for densification of liquid oxygen11 Jul 2024US 2024/0230218 A1
Most cited
By later US patents
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator136US 5,979,440 ASeQual Technologies, Inc. · 1999
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator133US 6,698,423 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator101US 6,681,764 B1SeQual Technologies, Inc. · 2004
- Methods and apparatus to generate liquid ambulatory oxygen from an oxygen concentrator91US 6,651,653 B1SeQual Technologies, Inc. · 2003
- Thermal cycle for the compression of a fluid by the expansion of another fluid25US 4,022,030 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1977