F25J 3/04151
Purification and cooling of the feed air
Official title: {Purification and (pre-)cooling of the feed air; recuperative heat-exchange with product streams}
F25J3/04151 (Purification and cooling of the feed air) appears on 690 US grants and 474 published applications in this corpus.
Search patents in F25J- Granted patents
- 690
- Published applications
- 474
- Assignees
- 128
- Inventors
- 725
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 3 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 10 | 0 |
| 1987 | 17 | 0 |
| 1988 | 11 | 0 |
| 1989 | 17 | 0 |
| 1990 | 10 | 0 |
| 1991 | 7 | 0 |
| 1992 | 28 | 0 |
| 1993 | 22 | 0 |
| 1994 | 28 | 0 |
| 1995 | 33 | 0 |
| 1996 | 24 | 0 |
| 1997 | 32 | 0 |
| 1998 | 28 | 0 |
| 1999 | 31 | 0 |
| 2000 | 24 | 0 |
| 2001 | 30 | 9 |
| 2002 | 17 | 17 |
| 2003 | 22 | 9 |
| 2004 | 8 | 12 |
| 2005 | 5 | 6 |
| 2006 | 6 | 19 |
| 2007 | 10 | 14 |
| 2008 | 3 | 13 |
| 2009 | 13 | 16 |
| 2010 | 5 | 14 |
| 2011 | 4 | 20 |
| 2012 | 3 | 20 |
| 2013 | 7 | 25 |
| 2014 | 10 | 20 |
| 2015 | 15 | 21 |
| 2016 | 13 | 27 |
| 2017 | 14 | 30 |
| 2018 | 12 | 19 |
| 2019 | 27 | 21 |
| 2020 | 17 | 14 |
| 2021 | 18 | 27 |
| 2022 | 8 | 26 |
| 2023 | 13 | 27 |
| 2024 | 17 | 24 |
| 2025 | 17 | 12 |
| 2026 | 12 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column15 Sep 2026US 12,736,282 B2Praxair Technology, Inc.
- Method and apparatus for cryogenic air separation8 Sep 2026US 12,729,907 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Refrigeration-integrated hydrocarbon collection system and method of operation25 Aug 2026US 12,716,649 B2Oxy Low Carbon Ventures, LLC
- Method and plant for low temperature fractionation of air18 Aug 2026US 12,710,228 B2Linde Aktiengesellschaft
- System for storing and producing energy to stabilize the power network26 May 2026US 12,638,234 B2Saipem S.P.A.
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo 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
- Apparatus and method for maintaining or increasing liquid production of an air separation unit9 Jul 2026US 2026/0194295 A1Air Liquide Large Industries U.S. LP
Most cited
By later US patents
- Hydrocarbon combustion power generation system with CO2 sequestration337US 6,389,814 B1Clean Energy Systems, Inc. · 2002
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Hydrocarbon combustion power generation system with CO2 sequestration216US 7,043,920 B2Clean Energy Systems, Inc. · 2006
- Hydrocarbon combustion power generation system with CO2 sequestration209US 6,170,264 B2Clean Energy Systems, Inc. · 2001
- Hydrocarbon combustion power generation system with CO2 sequestration163US 6,598,398 B2Clean Energy Systems, Inc. · 2003