F25J 3/04193
Division of the main heat exchange line in consecutive sections having different
Official title: {Division of the main heat exchange line in consecutive sections having different functions}
F25J3/04193 (Division of the main heat exchange line in consecutive sections having different) appears on 282 US grants and 125 published applications in this corpus.
Search patents in F25J- Granted patents
- 282
- Published applications
- 125
- Assignees
- 46
- Inventors
- 241
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 3 | 0 |
| 1986 | 9 | 0 |
| 1987 | 13 | 0 |
| 1988 | 10 | 0 |
| 1989 | 13 | 0 |
| 1990 | 8 | 0 |
| 1991 | 6 | 0 |
| 1992 | 13 | 0 |
| 1993 | 15 | 0 |
| 1994 | 13 | 0 |
| 1995 | 20 | 0 |
| 1996 | 10 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 8 | 0 |
| 2000 | 9 | 0 |
| 2001 | 14 | 3 |
| 2002 | 3 | 5 |
| 2003 | 8 | 3 |
| 2004 | 1 | 2 |
| 2005 | 0 | 3 |
| 2006 | 0 | 2 |
| 2007 | 5 | 3 |
| 2008 | 0 | 3 |
| 2009 | 1 | 4 |
| 2010 | 0 | 4 |
| 2011 | 1 | 6 |
| 2012 | 1 | 9 |
| 2013 | 1 | 12 |
| 2014 | 2 | 5 |
| 2015 | 5 | 7 |
| 2016 | 3 | 9 |
| 2017 | 6 | 9 |
| 2018 | 3 | 1 |
| 2019 | 9 | 10 |
| 2020 | 6 | 3 |
| 2021 | 3 | 9 |
| 2022 | 1 | 2 |
| 2023 | 4 | 4 |
| 2024 | 4 | 7 |
| 2025 | 4 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
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
- Method for obtaining one or more air products, and air separation unit14 Jan 2025US 12,196,488 B2Linde Aktiengesellschaft
- Method for separating air by cryogenic distillation11 Jul 2024US 2024/0230222 A9L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for separating air by cryogenic distillation25 Apr 2024US 2024/0133624 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- 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.
Most cited
By later US patents
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- Process and apparatus for purifying air to be distilled by adsorption75US 5,137,548 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1992
- Liquefied natural gas refrigeration transfer to a cryogenics air separation unit using high presure nitrogen stream67US 5,137,558 AAir Products and Chemicals, Inc. · 1992
- Process for the generation of gaseous and/or liquid nitrogen49US 4,595,405 AAir Products and Chemicals, Inc. · 1986
- Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery46US 4,822,395 AUnion Carbide Corporation · 1989