F25J 2250/04
Down-flowing type boiler-condenser, i.e. with evaporation of a falling liquid film
F25J2250/04 (Down-flowing type boiler-condenser, i.e. with evaporation of a falling liquid film) appears on 83 US grants and 61 published applications in this corpus.
Search patents in F25J- Granted patents
- 83
- Published applications
- 61
- Assignees
- 22
- Inventors
- 136
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 3 | 0 |
| 1998 | 8 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 6 | 4 |
| 2003 | 3 | 1 |
| 2004 | 2 | 2 |
| 2005 | 1 | 0 |
| 2006 | 1 | 1 |
| 2007 | 0 | 3 |
| 2008 | 1 | 2 |
| 2009 | 0 | 4 |
| 2010 | 0 | 2 |
| 2011 | 0 | 1 |
| 2012 | 2 | 3 |
| 2013 | 0 | 1 |
| 2014 | 0 | 2 |
| 2015 | 2 | 4 |
| 2016 | 7 | 9 |
| 2017 | 3 | 3 |
| 2018 | 3 | 5 |
| 2019 | 4 | 1 |
| 2020 | 2 | 2 |
| 2021 | 3 | 5 |
| 2022 | 1 | 2 |
| 2023 | 3 | 2 |
| 2024 | 2 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for separating air by cryogenic distillation26 May 2026US 12,638,239 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit11 Mar 2025US 12,247,783 B2Linde Aktiengesellschaft
- Method for separating a mixture containing at least nitrogen and methane2 Apr 2024US 11,946,692 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- System and method for recovery of nitrogen, argon, and oxygen in moderate pressure cryogenic air separation unit19 Mar 2024US 11,933,538 B2Praxair Technology, Inc.
- Heat exchanger, hardway fin arrangement for a heat exchanger, and methods relating to same3 Oct 2023US 11,774,189 B2Air Products and Chemicals, Inc.
- Titanium or titanium alloy heat exchanger1 May 2025US 2025/0137731 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for separating air by cryogenic distillation8 Feb 2024US 2024/0044578 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit13 Jul 2023US 2023/0221069 A1Linde Aktiengesellschaft
- Nitrogen and argon producing air separation unit23 Feb 2023US 2023/0055084 A1
- Method for separating a mixture containing at least nitrogen and methane13 Oct 2022US 2022/0325951 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
Most cited
By later US patents
- Heat exchanger with rectification effect51US 3,992,168 AKobe Steel, Ltd. · 1976
- Boiling process and a heat exchanger for use in the process37US 5,122,174 AAir Products and Chemicals, Inc. · 1992
- Cryogenic rectification system for lower pressure operation32US 5,410,885 A1995
- Heat exchanger31US 5,709,264 AThe BOC Group, Inc. · 1998
- Condenser/evaporator27US 5,222,549 AJapan Oxygen Co., Ltd. · 1993