F25J 3/04187
Cooling of the purified feed air by recuperative heat-exchange
Official title: {Cooling of the purified feed air by recuperative heat-exchange; Heat-exchange with product streams (arrangements of cold exchangers F25J5/002)}
F25J3/04187 (Cooling of the purified feed air by recuperative heat-exchange) appears on 468 US grants and 300 published applications in this corpus.
Search patents in F25J- Granted patents
- 468
- Published applications
- 300
- Assignees
- 79
- Inventors
- 458
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 3 | 0 |
| 1985 | 6 | 0 |
| 1986 | 10 | 0 |
| 1987 | 15 | 0 |
| 1988 | 11 | 0 |
| 1989 | 16 | 0 |
| 1990 | 9 | 0 |
| 1991 | 7 | 0 |
| 1992 | 23 | 0 |
| 1993 | 17 | 0 |
| 1994 | 22 | 0 |
| 1995 | 22 | 0 |
| 1996 | 14 | 0 |
| 1997 | 18 | 0 |
| 1998 | 20 | 0 |
| 1999 | 17 | 0 |
| 2000 | 14 | 0 |
| 2001 | 23 | 7 |
| 2002 | 10 | 9 |
| 2003 | 10 | 4 |
| 2004 | 2 | 5 |
| 2005 | 1 | 3 |
| 2006 | 3 | 5 |
| 2007 | 5 | 9 |
| 2008 | 1 | 8 |
| 2009 | 7 | 12 |
| 2010 | 3 | 11 |
| 2011 | 2 | 11 |
| 2012 | 2 | 14 |
| 2013 | 6 | 20 |
| 2014 | 6 | 9 |
| 2015 | 11 | 18 |
| 2016 | 8 | 17 |
| 2017 | 11 | 19 |
| 2018 | 9 | 11 |
| 2019 | 17 | 16 |
| 2020 | 9 | 9 |
| 2021 | 9 | 22 |
| 2022 | 6 | 19 |
| 2023 | 8 | 15 |
| 2024 | 13 | 17 |
| 2025 | 12 | 5 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- F25J 3/04193Division of the main heat exchange line in consecutive sections having different282
- F25J 3/04218Parallel arrangement of the main heat exchange line in cores having different128
- F25J 3/0423Subcooling of liquid process streams103
- F25J 3/04236Integration of different exchangers in a single core, so-called integrated cores43
Recent patents
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- System for storing and producing energy to stabilize the power network26 May 2026US 12,638,234 B2Saipem S.P.A.
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Process and apparatus for producing argon by cryogenic air separation23 Jul 2026US 2026/0210624 A1
- Air separation unit2 Apr 2026US 2026/0092735 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- High-purity oxygen production apparatus5 Mar 2026US 2026/0063360 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Heat exchanger5 Feb 2026US 2026/0036366 A1Taiyo Nippon Sanso Corporation
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- Combined air separation natural gas liquefaction plant104US 7,143,606 B2L'Air Liquide-Societe Anonyme a'Directoire et Conseil de Surveillance pour l'Etide et l'Exploitation des Procedes Georges Claude · 2006
- Integrated apparatus for generating power and/or oxygen enriched fluid, process for the operation thereof82US 6,276,171 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Apparatus for the low-temperature separation of a gas mixture, in particular air80US 7,516,626 B2Linde Aktiengesellschaft · 2009