F25J 3/044
Using a single pressure main column system only
Official title: {using a single pressure main column system only (F25J3/0446, F25J3/04624, F25J3/04636 take precedence)}
F25J3/044 (Using a single pressure main column system only) appears on 178 US grants and 74 published applications in this corpus.
Search patents in F25J- Granted patents
- 178
- Published applications
- 74
- Assignees
- 55
- Inventors
- 276
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 12 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 13 | 0 |
| 1995 | 8 | 0 |
| 1996 | 5 | 0 |
| 1997 | 7 | 0 |
| 1998 | 10 | 0 |
| 1999 | 10 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 3 |
| 2002 | 6 | 4 |
| 2003 | 5 | 1 |
| 2004 | 0 | 2 |
| 2005 | 1 | 2 |
| 2006 | 0 | 1 |
| 2007 | 1 | 2 |
| 2008 | 0 | 3 |
| 2009 | 1 | 3 |
| 2010 | 1 | 2 |
| 2011 | 0 | 4 |
| 2012 | 1 | 2 |
| 2013 | 3 | 4 |
| 2014 | 1 | 2 |
| 2015 | 1 | 3 |
| 2016 | 2 | 4 |
| 2017 | 3 | 6 |
| 2018 | 2 | 4 |
| 2019 | 0 | 1 |
| 2020 | 2 | 3 |
| 2021 | 4 | 4 |
| 2022 | 3 | 1 |
| 2023 | 1 | 5 |
| 2024 | 3 | 4 |
| 2025 | 1 | 3 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- System for storing and producing energy to stabilize the power network26 May 2026US 12,638,234 B2Saipem S.P.A.
- Nitrogen generating device and nitrogen generating method31 Mar 2026US 12,590,758 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Device for separating air by cryogenic distillation10 Feb 2026US 12,546,533 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Carbon dioxide recycle stream processing with ethylene glycol dehydrating in an enhanced oil recovery process18 Nov 2025US 12,474,115 B2Pilot Intellectual Property, LLC
- Multistage liquid storage-type condenser-evaporator and nitrogen production device using the same29 Oct 2024US 12,130,081 B2Taiyo Nippon Sanso Corporation
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Process and plant for providing a nitrogen product, an oxygen product and a hydrogen product28 Aug 2025US 2025/0271208 A1Linde Aktiengesellschaft
- Nitrogen generating device and nitrogen generating method20 Feb 2025US 2025/0060158 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Microchannel Distillation Device Fabricated Using Additive Manufacture2 Jan 2025US 2025/0003678 A1Battelle Memorial Institute
- Ultra-high-purity oxygen production method and ultra-high-purity oxygen production apparatus24 Oct 2024US 2024/0353173 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- Apparatus for producing nitrogen104US 4,792,502 AInternational Fuel Cells Corporation · 1988
- Integrated apparatus for generating power and/or oxygen enriched fluid and process for the operation thereof91US 6,202,442 B1L'Air Liquide Societe Anonyme Pour l'Etude et l'Expoitation des Procedes Georges Claude · 2001
- Integrated apparatus for generating power and/or oxygen enriched fluid, process for the operation thereof82US 6,276,171 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Apparatus for low temperature purification of gases78US 5,202,096 AThe BOC Group, Inc. · 1993