F25J 3/04775
Air purification and pre-cooling
Official title: {Air purification and pre-cooling}
F25J3/04775 (Air purification and pre-cooling) appears on 43 US grants and 51 published applications in this corpus.
Search patents in F25J- Granted patents
- 43
- Published applications
- 51
- Assignees
- 18
- Inventors
- 105
- Latest grant
- 11 Mar 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 3 | 4 |
| 2003 | 2 | 2 |
| 2004 | 1 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 2 | 4 |
| 2011 | 0 | 1 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 3 | 1 |
| 2016 | 1 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 4 |
| 2020 | 2 | 1 |
| 2021 | 1 | 5 |
| 2022 | 0 | 4 |
| 2023 | 4 | 2 |
| 2024 | 4 | 1 |
| 2025 | 3 | 3 |
| 2026 | 0 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Pre-purification arrangement for air separation and method of hybrid air purification11 Mar 2025US 12,247,782 B2Air Products and Chemicals, Inc.
- Air separation apparatus, adsorber, and method14 Jan 2025US 12,196,486 B2Air Products and Chemicals, Inc.
- Plant and process for aerial gas separation using a parallelepipedal adsorber14 Jan 2025US 12,196,487 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- 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
- System and method for separating air gases at low pressure24 Sep 2024US 12,098,883 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Process and apparatus for intermittent liquefaction operation that can support continuous air separation processing6 Aug 2026US 2026/0227123 A1Air Products and Chemicals, Inc.
- 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
- Air separation method and plant18 Dec 2025US 2025/0383144 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Process and device for cooling a gas by direct heat exchange with a cooling liquid97US 7,536,873 B2Linde Aktiengesellschaft · 2009
- Temperature swing adsorption71US 5,846,295 AAir Products and Chemicals, Inc. · 1998
- Temperature swing adsorption with regeneration by elevated pressure ASU nitrogen-enriched gas64US 5,968,234 AAir Products and Chemicals, Inc. · 1999
- Method for operation of an air prepurifier which takes into account inlet air conditions54US 5,989,313 APraxair Technology, Inc. · 1999
- Purification of air51US 9,108,145 B2Air Products and Chemicals, Inc. · 2015