F25J 3/04909
Structured packings
Official title: {Structured packings}
F25J3/04909 (Structured packings) appears on 72 US grants and 46 published applications in this corpus.
Search patents in F25J- Granted patents
- 72
- Published applications
- 46
- Assignees
- 17
- Inventors
- 120
- Latest grant
- 29 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 7 | 0 |
| 2002 | 4 | 4 |
| 2003 | 5 | 3 |
| 2004 | 3 | 1 |
| 2005 | 0 | 2 |
| 2006 | 3 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 0 |
| 2010 | 1 | 3 |
| 2011 | 0 | 3 |
| 2012 | 0 | 0 |
| 2013 | 1 | 2 |
| 2014 | 0 | 2 |
| 2015 | 1 | 3 |
| 2016 | 3 | 1 |
| 2017 | 2 | 3 |
| 2018 | 0 | 4 |
| 2019 | 3 | 6 |
| 2020 | 8 | 3 |
| 2021 | 2 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Cross-corrugated packing made from metal foam29 Apr 2025US 12,285,733 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Packing assembly, material exchange column, and method15 Jun 2021US 11,033,875 B2Linde Aktiengesellschaft
- 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.
- Annular divided wall column15 Dec 2020US 10,866,026 B2Praxair Technology, Inc.
- Argon column for air separation unit and air separation unit13 Mar 2025US 2025/0085050 A1Taiyo Nippon Sanso Corporation
- Cross-corrugated packing made from metal foam14 Jul 2022US 2022/0219134 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Annular divided wall column13 Aug 2020US 2020/0256616 A1Praxair Technology, Inc.
- Annular divided wall column14 May 2020US 2020/0149809 A1Praxair Technology, Inc.
- Annular divided wall column with ring shaped collectors and distributers14 May 2020US 2020/0149810 A1Praxair Technology, Inc.
Most cited
By later US patents
- Packing with improved capacity for rectification systems39US 5,632,934 APraxair Technology, Inc. · 1997
- Method for operating a cryogenic rectification column35US 5,921,109 APraxair Technology, Inc. · 1999
- Vapor-liquid contactor, cryogenic air separation unit and method of gas separation35US 6,565,629 B1Nippon Sanso Corporation · 2003
- Packed column for exchanging heat and/or mass32US 6,672,572 B2L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2004
- Air separation process using packed columns for oxygen and argon recovery27US 4,871,382 AAir Products and Chemicals, Inc. · 1989