F25J 3/04787
Heat exchange
Official title: {Heat exchange, e.g. main heat exchange line; Subcooler, external reboiler-condenser (F25J3/04793 and F25J3/0486 take precedence)}
F25J3/04787 (Heat exchange) appears on 42 US grants and 50 published applications in this corpus.
Search patents in F25J- Granted patents
- 42
- Published applications
- 50
- Assignees
- 13
- Inventors
- 97
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 2 |
| 2007 | 0 | 0 |
| 2008 | 1 | 3 |
| 2009 | 1 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 2 |
| 2016 | 1 | 2 |
| 2017 | 0 | 3 |
| 2018 | 1 | 1 |
| 2019 | 4 | 18 |
| 2020 | 2 | 1 |
| 2021 | 2 | 2 |
| 2022 | 11 | 5 |
| 2023 | 1 | 1 |
| 2024 | 4 | 2 |
| 2025 | 2 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Dual temperature liquid oxygen subcooling in an air separation unit22 Sep 2026US 12,742,591 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for operating an air separation plant, having a distillation column system, a heat exchanger and an adsorber, and air separation plant14 Oct 2025US 12,442,593 B2Linde Aktiengesellschaft
- Method for operating a heat exchanger, arrangement with a heat exchanger, and system with a corresponding arrangement4 Mar 2025US 12,241,692 B2Linde Aktiengesellschaft
- Apparatus and method for separation of air by cryogenic distillation31 Dec 2024US 12,181,217 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation device and air separation method22 Oct 2024US 12,123,647 B2Taiyo Nippon Sanso Corporation
- Method for managing a process engineering facility19 Feb 2026US 2026/0049773 A1Linde Aktiengesellschaft
- Air separation unit21 Aug 2025US 2025/0264274 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation system and air separation method2 Jan 2025US 2025/0003679 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Dual temperature liquid oxygen subcooling in an air separation unit24 Oct 2024US 2024/0353174 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation unit15 Feb 2024US 2024/0053098 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Method and apparatus for gas separation20US 4,746,343 AHitachi, Ltd. · 1988
- Separation method and apparatus20US 8,020,408 B2Praxair Technology, Inc. · 2011
- Separation method and apparatus12US 9,038,413 B2Praxair Technology, Inc. · 2015
- Process for the separation of a gas mixture by cryogenic distillation10US 5,651,271 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1997
- Cryogenic rectification apparatus for producing high purity oxygen or low purity oxygen7US 5,881,570 APraxair Technology, Inc. · 1999