F25J 3/04309
Of nitrogen
Official title: {of nitrogen}
F25J3/04309 (Of nitrogen) appears on 185 US grants and 89 published applications in this corpus.
Search patents in F25J- Granted patents
- 185
- Published applications
- 89
- Assignees
- 36
- Inventors
- 209
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 2 | 0 |
| 1988 | 9 | 0 |
| 1989 | 12 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 11 | 0 |
| 1993 | 10 | 0 |
| 1994 | 12 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 9 | 0 |
| 2000 | 6 | 0 |
| 2001 | 12 | 1 |
| 2002 | 2 | 2 |
| 2003 | 7 | 3 |
| 2004 | 2 | 1 |
| 2005 | 2 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 4 |
| 2008 | 0 | 4 |
| 2009 | 1 | 2 |
| 2010 | 2 | 5 |
| 2011 | 1 | 4 |
| 2012 | 0 | 5 |
| 2013 | 3 | 3 |
| 2014 | 1 | 5 |
| 2015 | 3 | 3 |
| 2016 | 1 | 3 |
| 2017 | 2 | 5 |
| 2018 | 5 | 5 |
| 2019 | 6 | 3 |
| 2020 | 2 | 4 |
| 2021 | 3 | 5 |
| 2022 | 1 | 4 |
| 2023 | 1 | 5 |
| 2024 | 2 | 4 |
| 2025 | 3 | 3 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Method and plant for low temperature fractionation of air18 Aug 2026US 12,710,228 B2Linde Aktiengesellschaft
- Air separation apparatus7 Apr 2026US 12,595,961 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process for cryogenic fractionation of air, air fractionation plant and integrated system composed of at least two air fractionation plants30 Dec 2025US 12,510,294 B2Linde Aktiengesellschaft
- Apparatus and process for liquefying gases9 Dec 2025US 12,492,864 B1
- 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
- Air separation unit2 Apr 2026US 2026/0092735 A1L' Air Liquide, Societe Anonyme pour I' Etude et I'Exploitation des Procedes Georges Claude
- Apparatus and process for providing nitrogen and oxygen18 Sep 2025US 2025/0290692 A1Air Products and Chemicals, Inc.
- Air separation unit14 Aug 2025US 2025/0257941 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Air separation process and system utilizing pressure-swing driers95US 3,967,464 AAir Products and Chemicals, Inc. · 1976
- 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
- Turbine/motor (generator) driven booster compressor74US 5,924,307 APraxair Technology, Inc. · 1999
- Integrated air separation plant-integrated gasification combined cycle power generator60US 5,421,166 AAir Products and Chemicals, Inc. · 1995