F25J 3/04521
Coupling of the air fractionation unit to an air gas-consuming unit, so-called
Official title: {Coupling of the air fractionation unit to an air gas-consuming unit, so-called integrated processes (combined plants, e.g. engine plant combined with an industrial process F01K23/064; gas-turbine plants supplying working fluid to a chemical process F02C6/10)}
F25J3/04521 (Coupling of the air fractionation unit to an air gas-consuming unit, so-called) appears on 389 US grants and 350 published applications in this corpus.
Search patents in F25J- Granted patents
- 389
- Published applications
- 350
- Assignees
- 168
- Inventors
- 708
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 6 | 0 |
| 1989 | 4 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 13 | 0 |
| 1994 | 9 | 0 |
| 1995 | 12 | 0 |
| 1996 | 11 | 0 |
| 1997 | 13 | 0 |
| 1998 | 11 | 0 |
| 1999 | 15 | 0 |
| 2000 | 25 | 0 |
| 2001 | 22 | 3 |
| 2002 | 8 | 16 |
| 2003 | 19 | 11 |
| 2004 | 6 | 24 |
| 2005 | 13 | 13 |
| 2006 | 8 | 17 |
| 2007 | 10 | 11 |
| 2008 | 4 | 16 |
| 2009 | 8 | 17 |
| 2010 | 4 | 18 |
| 2011 | 11 | 18 |
| 2012 | 8 | 22 |
| 2013 | 9 | 21 |
| 2014 | 6 | 16 |
| 2015 | 9 | 11 |
| 2016 | 9 | 10 |
| 2017 | 8 | 8 |
| 2018 | 11 | 17 |
| 2019 | 11 | 6 |
| 2020 | 8 | 12 |
| 2021 | 6 | 3 |
| 2022 | 8 | 10 |
| 2023 | 7 | 20 |
| 2024 | 5 | 14 |
| 2025 | 8 | 12 |
| 2026 | 9 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
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- Compressed carbon dioxide energy storage system and method combined with air separation technology25 Jun 2026US 2026/0176984 A1Xi' An Jiaotong University
- Cryogenic air separation enhanced gas turbine21 May 2026US 2026/0139621 A1Rtx Corporation
- Thermal integration temperature balancing of air separation unit and power generation system19 Mar 2026US 2026/0078947 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Processing Gases18 Dec 2025US 2025/0383143 A1NET Power LLC
Most cited
By later US patents
- Hydrocarbon combustion power generation system with CO2 sequestration337US 6,389,814 B1Clean Energy Systems, Inc. · 2002
- Method for producing methane-containing gaseous mixtures305US 5,388,645 AAmoco Corporation · 1995
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Method for recovering methane from a solid carbonaceous subterranean formation224US 5,566,755 AAmoco Corporation · 1996
- Hydrocarbon combustion power generation system with CO2 sequestration216US 7,043,920 B2Clean Energy Systems, Inc. · 2006