F25J 3/04939
Vertical
Official title: {Vertical, e.g. dividing wall columns (details of dephlegmators F25J5/007)}
F25J3/04939 (Vertical) appears on 39 US grants and 40 published applications in this corpus.
Search patents in F25J- Granted patents
- 39
- Published applications
- 40
- Assignees
- 13
- Inventors
- 74
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 0 |
| 2003 | 2 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 4 |
| 2007 | 1 | 0 |
| 2008 | 3 | 3 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 6 |
| 2018 | 6 | 4 |
| 2019 | 1 | 5 |
| 2020 | 7 | 4 |
| 2021 | 1 | 2 |
| 2022 | 1 | 2 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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.
- System and method for the production of argon in an air separation plant facility or enclave having multiple cryogenic air separation units1 Aug 2023US 11,713,921 B2Praxair Technology, Inc.
- Method and apparatus for separating air by cryogenic distillation6 Sep 2022US 11,435,139 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Annular divided wall column23 Feb 2021US 10,928,129 B2Praxair Technology, Inc.
- Annular divided wall column with ring shaped collectors and distributers15 Dec 2020US 10,866,025 B2Praxair Technology, Inc.
- System and method for production of ultra-high purity oxygen5 Feb 2026US 2026/0035243 A1
- System and method for optimizing production of argon in a cryogenic air separation unit5 Feb 2026US 2026/0035246 A1
- Cryogenic air rectification system, control unit, air separation unit and method of cryogenically separating air8 May 2025US 2025/0146746 A1Linde Aktiengesellschaft
- 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.
- Argon enhancing method and device21 Sep 2023US 2023/0296314 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Process for distillation of multicomponent fluid and production of an argon-enriched stream from a cryogenic air separation process57US 6,240,744 B1Air Products and Chemicals, Inc. · 2001
- Distillation system with partitioned column39US 5,339,648 APraxair Technology, Inc. · 1994
- Hydraulically balanced fully thermally coupled system27US 6,347,533 B12002
- Divided wall columns for smaller sized plants24US 8,480,860 B2Air Products and Chemicals, Inc. · 2013
- Process for separation of multicomponent fluids using a multizone distallation column22US 6,250,106 B1Air Products and Chemicals, Inc. · 2001