F25J 2250/30
External or auxiliary boiler-condenser in general
Official title: External or auxiliary boiler-condenser in general, e.g. without a specified fluid or one fluid is not a primary air component or an intermediate fluid
F25J2250/30 (External or auxiliary boiler-condenser in general) appears on 270 US grants and 132 published applications in this corpus.
Search patents in F25J- Granted patents
- 270
- Published applications
- 132
- Assignees
- 59
- Inventors
- 342
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 9 | 0 |
| 1988 | 10 | 0 |
| 1989 | 10 | 0 |
| 1990 | 7 | 0 |
| 1991 | 5 | 0 |
| 1992 | 13 | 0 |
| 1993 | 15 | 0 |
| 1994 | 14 | 0 |
| 1995 | 12 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 14 | 0 |
| 1999 | 14 | 0 |
| 2000 | 11 | 0 |
| 2001 | 18 | 4 |
| 2002 | 8 | 4 |
| 2003 | 6 | 4 |
| 2004 | 3 | 4 |
| 2005 | 6 | 3 |
| 2006 | 0 | 2 |
| 2007 | 0 | 6 |
| 2008 | 2 | 5 |
| 2009 | 3 | 5 |
| 2010 | 0 | 1 |
| 2011 | 3 | 8 |
| 2012 | 2 | 5 |
| 2013 | 0 | 6 |
| 2014 | 3 | 6 |
| 2015 | 2 | 6 |
| 2016 | 3 | 5 |
| 2017 | 5 | 3 |
| 2018 | 4 | 6 |
| 2019 | 5 | 4 |
| 2020 | 4 | 6 |
| 2021 | 4 | 10 |
| 2022 | 3 | 10 |
| 2023 | 2 | 5 |
| 2024 | 4 | 6 |
| 2025 | 6 | 2 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions25 Aug 2026US 12,716,650 B2Saipem S.P.A.
- 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
- Power generation process utilizing fuel, liquid air and/or oxygen with zero CO2 emissions28 Apr 2026US 12,613,064 B2Saipem S.P.A.
- System for purifying argon by cryogenic distillation23 Dec 2025US 12,503,365 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Apparatus and process for liquefying gases9 Dec 2025US 12,492,864 B1
- 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
- Nitrogen Rejection Unit with Mixed Refrigerant Cooling System and Method28 May 2026US 2026/0146785 A1
- 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 hydrogen recycling to avoid liquefier shutdown due to insufficient feed of hydrogen19 Feb 2026US 2026/0049761 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Power plant with carbon dioxide capture and zero pollutant emissions254US 5,724,805 AUniversity of Massachusetts Lowell · 1998
- Zero emissions closed rankine cycle power system124US 7,882,692 B2Clean Energy Systems, Inc. · 2011
- Air separation process and system utilizing pressure-swing driers95US 3,967,464 AAir Products and Chemicals, Inc. · 1976
- Efficient process to produce oxygen48US 5,966,967 AAir Products and Chemicals, Inc. · 1999
- Triple column distillation system for oxygen and pressurized nitrogen production46US 5,341,646 AAir Products and Chemicals, Inc. · 1994