F25J 3/04915
Combinations of different material exchange elements
Official title: {Combinations of different material exchange elements, e.g. within different columns}
F25J3/04915 (Combinations of different material exchange elements) appears on 37 US grants and 26 published applications in this corpus.
Search patents in F25J- Granted patents
- 37
- Published applications
- 26
- Assignees
- 12
- Inventors
- 73
- Latest grant
- 14 Sep 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 4 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 3 |
| 2016 | 0 | 1 |
| 2017 | 2 | 2 |
| 2018 | 0 | 3 |
| 2019 | 1 | 5 |
| 2020 | 7 | 3 |
| 2021 | 3 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Method and device for generating gaseous compressed nitrogen14 Sep 2021US 11,118,834 B2Linde Aktiengesellschaft
- Process for obtaining one or more air products and air separation plant24 Aug 2021US 11,098,950 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
- Plant and method for low-temperature air separation14 Nov 2024US 2024/0377129 A1Linde Aktiengesellschaft
- Plant and process for low-temperature fractionation of air14 Nov 2024US 2024/0377131 A1Linde Aktiengesellschaft
- Annular divided wall column13 Aug 2020US 2020/0256616 A1Praxair Technology, Inc.
- Annular divided wall column14 May 2020US 2020/0149809 A1Praxair Technology, Inc.
Most cited
By later US patents
- 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
- Method of purifying argon through cryogenic adsorption29US 5,159,816 AAir Products and Chemicals, Inc. · 1992
- Air separation process using packed columns for oxygen and argon recovery27US 4,871,382 AAir Products and Chemicals, Inc. · 1989
- Divided wall columns for smaller sized plants24US 8,480,860 B2Air Products and Chemicals, Inc. · 2013
- Variable density structured packing cryogenic distillation system23US 5,100,448 AUnion Carbide Industrial Gases Technology Corporation · 1992