F25J 3/08
Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases
Official title: Separating gaseous impurities from gases or gaseous mixtures {or from liquefied gases or liquefied gaseous mixtures}(cold traps B01D8/00)
F25J3/08 (Separating gaseous impurities from gases or gaseous mixtures or from liquefied gases) appears on 251 US grants and 260 published applications in this corpus.
Search patents in F25J- Granted patents
- 251
- Published applications
- 260
- Assignees
- 124
- Inventors
- 548
- Latest grant
- 14 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 6 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 7 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 7 | 1 |
| 2002 | 5 | 4 |
| 2003 | 1 | 4 |
| 2004 | 2 | 7 |
| 2005 | 5 | 7 |
| 2006 | 3 | 2 |
| 2007 | 4 | 6 |
| 2008 | 2 | 3 |
| 2009 | 4 | 5 |
| 2010 | 1 | 4 |
| 2011 | 4 | 8 |
| 2012 | 2 | 4 |
| 2013 | 2 | 26 |
| 2014 | 10 | 20 |
| 2015 | 9 | 24 |
| 2016 | 8 | 20 |
| 2017 | 16 | 19 |
| 2018 | 17 | 20 |
| 2019 | 19 | 17 |
| 2020 | 9 | 12 |
| 2021 | 14 | 11 |
| 2022 | 6 | 5 |
| 2023 | 7 | 13 |
| 2024 | 9 | 8 |
| 2025 | 4 | 3 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Device and method for recovering carbon dioxide and nitrogen from flue gas14 Apr 2026US 12,601,540 B2Hangzhou Oxygen Plant Group Co., Ltd.
- Purification system for nitrogen gas and xenon gas in water and isotope static analysis method thereof3 Mar 2026US 12,566,154 B2Institute of Geology and Geophysics, Chinese Academy of Sciences
- Method for liquefying a stream rich in CO23 Feb 2026US 12,540,771 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and apparatus for liquefying a CO2-rich gas23 Dec 2025US 12,504,226 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Gas purification method and device13 May 2025US 12,297,107 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and device for separating a carbon dioxide-containing gas by partial condensation and/or distillation and/or solidification8 Oct 2026US 2026/0306989 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Methods and systems for efficient pressurized liquefied natural gas (plng) production, delivery, and use across mobile and stationary applications8 Oct 2026US 2026/0309409 A1Cryosys, LLC
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- Method for liquefying a stream rich in co216 Jul 2026US 2026/0202124 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method and installation for the production of a liquefied cryogenic fluid9 Apr 2026US 2026/0098682 A1L'Air Liquide, Société Anonyme pour |'Etude et |'Exploitation des Procédés Georges Claude
Most cited
By later US patents
- Integrated heat exchanger system for producing carbon dioxide91US 6,477,859 B2Praxair Technology, Inc. · 2002
- Argon recovery from argon-oxygen-decarburization process waste gases71US 5,125,934 AThe BOC Group, Inc. · 1992
- Carbon dioxide production system with integral vent gas condenser52US 5,927,103 APraxair Technology, Inc. · 1999
- Process for removing oxygen from crude argon50US 5,035,726 AAir Products and Chemicals, Inc. · 1991
- High pressure CO2 purification and supply system45US 7,055,333 B2The BOC Group, Inc. · 2006