F25J 3/04284
Using internal refrigeration by open-loop gas work expansion
Official title: {using internal refrigeration by open-loop gas work expansion, e.g. of intermediate or oxygen enriched (waste-)streams (F25J3/04333 takes precedence)}
F25J3/04284 (Using internal refrigeration by open-loop gas work expansion) appears on 785 US grants and 451 published applications in this corpus.
Search patents in F25J- Granted patents
- 785
- Published applications
- 451
- Assignees
- 107
- Inventors
- 643
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 4 | 0 |
| 1983 | 8 | 0 |
| 1984 | 4 | 0 |
| 1985 | 12 | 0 |
| 1986 | 11 | 0 |
| 1987 | 12 | 0 |
| 1988 | 16 | 0 |
| 1989 | 22 | 0 |
| 1990 | 12 | 0 |
| 1991 | 16 | 0 |
| 1992 | 28 | 0 |
| 1993 | 29 | 0 |
| 1994 | 31 | 0 |
| 1995 | 46 | 0 |
| 1996 | 30 | 0 |
| 1997 | 47 | 0 |
| 1998 | 36 | 0 |
| 1999 | 42 | 0 |
| 2000 | 26 | 0 |
| 2001 | 45 | 9 |
| 2002 | 23 | 12 |
| 2003 | 23 | 10 |
| 2004 | 7 | 12 |
| 2005 | 6 | 6 |
| 2006 | 5 | 8 |
| 2007 | 6 | 18 |
| 2008 | 3 | 16 |
| 2009 | 6 | 16 |
| 2010 | 3 | 14 |
| 2011 | 3 | 21 |
| 2012 | 4 | 16 |
| 2013 | 7 | 21 |
| 2014 | 10 | 18 |
| 2015 | 15 | 14 |
| 2016 | 7 | 27 |
| 2017 | 12 | 26 |
| 2018 | 19 | 22 |
| 2019 | 25 | 24 |
| 2020 | 14 | 14 |
| 2021 | 14 | 22 |
| 2022 | 7 | 26 |
| 2023 | 14 | 35 |
| 2024 | 17 | 23 |
| 2025 | 22 | 11 |
| 2026 | 13 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for configuring a control system for a process plant29 Sep 2026US 12,747,912 B2Linde Aktiengesellschaft
- Dual temperature liquid oxygen subcooling in an air separation unit22 Sep 2026US 12,742,591 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Apparatus and process for improved argon recovery8 Sep 2026US 12,729,908 B2Air Products and Chemicals, Inc.
- Air separation unit and air separation method25 Aug 2026US 12,716,651 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and plant for low temperature fractionation of air18 Aug 2026US 12,710,228 B2Linde Aktiengesellschaft
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- System for producing compressed hydrogen13 Aug 2026US 2026/0234824 A1Ceres Intellectual Property Company Limited
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- 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