F25J 3/04157
Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air
Official title: {Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air purification unit and main heat exchange line (F25J3/04618 takes precedence)}
F25J3/04157 (Afterstage cooling and so-called "pre-cooling" of the feed air upstream the air) appears on 98 US grants and 69 published applications in this corpus.
Search patents in F25J- Granted patents
- 98
- Published applications
- 69
- Assignees
- 42
- Inventors
- 209
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 3 |
| 2004 | 4 | 4 |
| 2005 | 2 | 2 |
| 2006 | 2 | 9 |
| 2007 | 5 | 0 |
| 2008 | 0 | 2 |
| 2009 | 5 | 2 |
| 2010 | 0 | 2 |
| 2011 | 0 | 2 |
| 2012 | 0 | 3 |
| 2013 | 2 | 4 |
| 2014 | 0 | 6 |
| 2015 | 0 | 1 |
| 2016 | 3 | 1 |
| 2017 | 3 | 6 |
| 2018 | 2 | 4 |
| 2019 | 4 | 0 |
| 2020 | 3 | 1 |
| 2021 | 1 | 4 |
| 2022 | 0 | 3 |
| 2023 | 3 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device for separating air by cryogenic distillation10 Feb 2026US 12,546,533 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation apparatus, adsorber, and method14 Jan 2025US 12,196,486 B2Air Products and Chemicals, Inc.
- Chiller, air separation system, and related methods16 Jul 2024US 12,038,230 B2Air Products and Chemicals, Inc.
- Air separation device16 Apr 2024US 11,959,702 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and apparatus for separating air by cryogenic distillation26 Dec 2023US 11,852,408 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Apparatus and process for low temperature regeneration of adsorbent material14 May 2026US 2026/0131276 A1Air Products and Chemicals, Inc.
- Process and apparatus for separating a gas mixture5 Feb 2026US 2026/0036365 A1L'Air Liquide, Société Anonyme pour I'Etube et I'Exploitation des Procédés Georges Claude
- Processing Gases18 Dec 2025US 2025/0383143 A1NET Power LLC
- Method and apparatus for compressing a gas24 Jul 2025US 2025/0237431 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Water cooling system and air separation device provided with same12 Jun 2025US 2025/0189246 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Combined power cycle with liquefied natural gas (LNG) and synthesis or fuel gas140US 5,295,350 ATexaco Inc. · 1994
- 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
- Air separation process and system with gas turbine drivers97US 6,345,493 B1Air Products and Chemicals, Inc. · 2002
- Process and device for cooling a gas by direct heat exchange with a cooling liquid97US 7,536,873 B2Linde Aktiengesellschaft · 2009
- Apparatus for the low-temperature separation of a gas mixture, in particular air80US 7,516,626 B2Linde Aktiengesellschaft · 2009