F25J 3/04212
And simultaneously condensing vapor from a column serving as reflux within the
Official title: {and simultaneously condensing vapor from a column serving as reflux within the or another column}
F25J3/04212 (And simultaneously condensing vapor from a column serving as reflux within the) appears on 75 US grants and 39 published applications in this corpus.
Search patents in F25J- Granted patents
- 75
- Published applications
- 39
- Assignees
- 19
- Inventors
- 67
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 5 | 0 |
| 1994 | 3 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 3 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 6 | 2 |
| 2002 | 3 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 1 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 4 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 3 | 4 |
| 2020 | 4 | 3 |
| 2021 | 2 | 7 |
| 2022 | 0 | 0 |
| 2023 | 2 | 3 |
| 2024 | 2 | 3 |
| 2025 | 3 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column15 Sep 2026US 12,736,282 B2Praxair Technology, Inc.
- Process and plant for low-temperature separation of air9 Dec 2025US 12,492,863 B2Linde Aktiengesellschaft
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column8 Jul 2025US 12,352,496 B2Praxair Technology, Inc.
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit11 Mar 2025US 12,247,783 B2Linde Aktiengesellschaft
- Air separation unit and method for production of nitrogen and argon using a distillation column system with an intermediate pressure kettle column6 Aug 2024US 12,055,345 B2Praxair Technology, Inc.
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column1 Feb 2024US 2024/0035740 A1Praxair Technology, Inc.
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column1 Feb 2024US 2024/0035741 A1Praxair Technology, Inc.
- Air separation unit and method for production of nitrogen and argon using a distillation column system with an intermediate pressure kettle column1 Feb 2024US 2024/0035744 A1Praxair Technology, Inc.
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit13 Jul 2023US 2023/0221069 A1Linde Aktiengesellschaft
- Nitrogen and argon producing air separation unit23 Feb 2023US 2023/0055084 A1
Most cited
By later US patents
- Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery46US 4,822,395 AUnion Carbide Corporation · 1989
- Cryogenic air separation with cold argon recycle38US 4,533,375 A1985
- Air separation with medium pressure enrichment30US 4,433,989 A1984
- Liquefied gases using an air recycle liquefier26US 4,715,873 AAir Products and Chemicals, Inc. · 1987
- 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