F25J 2250/42
One fluid being nitrogen
F25J2250/42 (One fluid being nitrogen) appears on 100 US grants and 40 published applications in this corpus.
Search patents in F25J- Granted patents
- 100
- Published applications
- 40
- Assignees
- 32
- Inventors
- 169
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 3 | 0 |
| 1988 | 3 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 4 | 0 |
| 1994 | 7 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 6 | 0 |
| 1999 | 7 | 0 |
| 2000 | 4 | 0 |
| 2001 | 10 | 2 |
| 2002 | 4 | 1 |
| 2003 | 1 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 4 |
| 2012 | 1 | 3 |
| 2013 | 0 | 0 |
| 2014 | 2 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 2 |
| 2018 | 2 | 3 |
| 2019 | 1 | 0 |
| 2020 | 3 | 3 |
| 2021 | 2 | 6 |
| 2022 | 1 | 3 |
| 2023 | 1 | 2 |
| 2024 | 1 | 0 |
| 2025 | 2 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions28 Apr 2026US 12,613,064 B2Saipem S.P.A.
- Apparatus and process for liquefying gases9 Dec 2025US 12,492,864 B1
- Method to convert excess liquid oxygen into liquid nitrogen20 May 2025US 12,305,916 B2Airgas, Inc.
- Method and apparatus for air separation by cryogenic distillation2 Jul 2024US 12,025,372 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and apparatus for managing industrial gas production23 May 2023US 11,656,612 B2Air Products and Chemicals, Inc.
- Process and apparatus for intermittent liquefaction operation that can support continuous air separation processing6 Aug 2026US 2026/0227123 A1Air Products and Chemicals, Inc.
- 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
- Process and device for producing liquid methane10 Jul 2025US 2025/0223245 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Power generation process utilizing fuel, liquid air and/or oxygen with zero co2 emissions28 Dec 2023US 2023/0417482 A1Saipem S.P.A.
Most cited
By later US patents
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999
- Tonnage nitrogen generator38US 4,222,756 AAir Products and Chemicals, Inc. · 1980
- Tonnage nitrogen air separation with side reboiler condenser35US 4,617,036 AAir Products and Chemicals, Inc. · 1986
- High speed pressure swing adsorption liquid oxygen/liquid nitrogen generating plant34US 4,957,523 APacific Consolidated Industries, LLC · 1990
- Liquid products using an air and a nitrogen recycle liquefier30US 4,705,548 AAir Products and Chemicals, Inc. · 1987