F25J 3/04896
Details of columns
Official title: {Details of columns, e.g. internals, inlet/outlet devices}
F25J3/04896 (Details of columns) appears on 184 US grants and 132 published applications in this corpus.
Search patents in F25J- Granted patents
- 184
- Published applications
- 132
- Assignees
- 39
- Inventors
- 275
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 5 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 4 | 0 |
| 1996 | 3 | 0 |
| 1997 | 12 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 5 | 0 |
| 2001 | 17 | 0 |
| 2002 | 8 | 5 |
| 2003 | 8 | 4 |
| 2004 | 4 | 4 |
| 2005 | 1 | 3 |
| 2006 | 4 | 7 |
| 2007 | 3 | 2 |
| 2008 | 3 | 5 |
| 2009 | 2 | 1 |
| 2010 | 1 | 4 |
| 2011 | 0 | 4 |
| 2012 | 0 | 3 |
| 2013 | 2 | 5 |
| 2014 | 0 | 16 |
| 2015 | 3 | 4 |
| 2016 | 7 | 2 |
| 2017 | 11 | 10 |
| 2018 | 8 | 13 |
| 2019 | 4 | 12 |
| 2020 | 14 | 8 |
| 2021 | 8 | 4 |
| 2022 | 4 | 5 |
| 2023 | 1 | 2 |
| 2024 | 1 | 3 |
| 2025 | 4 | 4 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System for purifying argon by cryogenic distillation23 Dec 2025US 12,503,365 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Waste argon separation system and method capable of reducing emission of cryogenic waste argon26 Aug 2025US 12,398,952 B2Shanghai Lifengas Co., Ltd
- 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.
- 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
- 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 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
- Waste argon separation system and method capable of reducing emission of cryogenic waste argon20 Mar 2025US 2025/0093095 A1Shanghai Lifengas Co., Ltd
- Argon column for air separation unit and air separation unit13 Mar 2025US 2025/0085050 A1Taiyo Nippon Sanso Corporation
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 process using microchannel technology56US 7,610,775 B2Velocys, Inc. · 2009
- Distillation process using microchannel technology54US 7,305,850 B2Velocys, Inc. · 2007
- Distillation system with partitioned column39US 5,339,648 APraxair Technology, Inc. · 1994
- Packing with improved capacity for rectification systems39US 5,632,934 APraxair Technology, Inc. · 1997