F25J 2250/10
Boiler-condenser with superposed stages
F25J2250/10 (Boiler-condenser with superposed stages) appears on 55 US grants and 39 published applications in this corpus.
Search patents in F25J- Granted patents
- 55
- Published applications
- 39
- Assignees
- 19
- Inventors
- 99
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 2 | 2 |
| 2002 | 5 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 1 |
| 2005 | 0 | 1 |
| 2006 | 2 | 1 |
| 2007 | 1 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 1 | 0 |
| 2012 | 0 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 3 |
| 2016 | 4 | 4 |
| 2017 | 2 | 4 |
| 2018 | 3 | 2 |
| 2019 | 5 | 3 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 1 |
| 2023 | 0 | 3 |
| 2024 | 2 | 3 |
| 2025 | 0 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- 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 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
- Nitrogen generating device and nitrogen generating method31 Mar 2026US 12,590,758 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Multistage liquid storage-type condenser-evaporator and nitrogen production device using the same29 Oct 2024US 12,130,081 B2Taiyo Nippon Sanso Corporation
- Cryogenic air separation unit with argon condenser vapor recycle19 Mar 2024US 11,933,539 B2Praxair Technology, Inc.
- High-purity oxygen production apparatus5 Mar 2026US 2026/0063360 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- High-purity oxygen production method, and air separation device for producing high-purity oxygen12 Jun 2025US 2025/0189218 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Ultra-high-purity oxygen production method and ultra-high-purity oxygen production apparatus24 Oct 2024US 2024/0353173 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Air separation unit and air separation method15 Feb 2024US 2024/0053097 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
Most cited
By later US patents
- Tonnage nitrogen air separation with side reboiler condenser35US 4,617,036 AAir Products and Chemicals, Inc. · 1986
- Process to produce ultrahigh purity oxygen27US 4,560,397 AUnion Carbide Corporation · 1985
- Condenser-evaporator for large air separation plant27US 4,606,745 ANippon Sanso Corporation · 1986
- Condenser/evaporator27US 5,222,549 AJapan Oxygen Co., Ltd. · 1993
- Vaporization-condensation apparatus for air distillation double column, and air distillation equipment including such apparatus22US 5,071,458 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1991