F25J 3/04793
Rectification
Official title: {Rectification, e.g. columns; Reboiler-condenser (F25J3/0486 takes precedence)}
F25J3/04793 (Rectification) appears on 100 US grants and 70 published applications in this corpus.
Search patents in F25J- Granted patents
- 100
- Published applications
- 70
- Assignees
- 23
- Inventors
- 165
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 4 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 0 |
| 2002 | 2 | 3 |
| 2003 | 5 | 3 |
| 2004 | 2 | 2 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 3 | 3 |
| 2008 | 0 | 0 |
| 2009 | 2 | 2 |
| 2010 | 0 | 1 |
| 2011 | 0 | 2 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 2 | 0 |
| 2015 | 1 | 2 |
| 2016 | 4 | 6 |
| 2017 | 2 | 2 |
| 2018 | 3 | 4 |
| 2019 | 5 | 6 |
| 2020 | 4 | 8 |
| 2021 | 5 | 5 |
| 2022 | 3 | 6 |
| 2023 | 2 | 1 |
| 2024 | 4 | 4 |
| 2025 | 3 | 3 |
| 2026 | 1 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air separation apparatus7 Apr 2026US 12,595,961 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for improved recovery of argon12 Aug 2025US 12,385,692 B2Air Products and Chemicals, Inc.
- Method, device, and storage medium for measuring nitrogen content15 Jul 2025US 12,360,092 B2Shanghai Lifengas Co., Ltd
- Method for starting up an argon separation column of an apparatus for air separation by cryogenic distillation and unit for implementing the method27 May 2025US 12,313,336 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation device and air separation method22 Oct 2024US 12,123,647 B2Taiyo Nippon Sanso Corporation
- Process and apparatus for producing argon by cryogenic air separation23 Jul 2026US 2026/0210624 A1
- Method for cryogenic separation of air, and air separation plant16 Jul 2026US 2026/0202125 A1Linde Aktiengesellschaft
- High-purity oxygen production apparatus5 Mar 2026US 2026/0063360 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for optimizing production of argon in a cryogenic air separation unit5 Feb 2026US 2026/0035246 A1
- Apparatus and Process for Improved Argon Recovery9 Oct 2025US 2025/0314424 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Process and apparatus for the recovery of krypton and/or xenon36US 6,694,775 B1Air Products and Chemicals, Inc. · 2004
- Hydraulically balanced fully thermally coupled system27US 6,347,533 B12002
- Vaporization-condensation apparatus for air distillation double column, and air distillation equipment including such apparatus22US 5,071,458 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1991
- Distillation process to separate mixtures containing three or more components21US 6,116,051 AAir Products and Chemicals, Inc. · 2000
- Process and apparatus for controlling argon column feedstreams20US 4,784,677 AThe BOC Group, Inc. · 1988