F25J 3/04169
By adsorption of the impurities
Official title: {by adsorption of the impurities (adsorption in general B01D53/02)}
F25J3/04169 (By adsorption of the impurities) appears on 277 US grants and 220 published applications in this corpus.
Search patents in F25J- Granted patents
- 277
- Published applications
- 220
- Assignees
- 69
- Inventors
- 404
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 2 | 0 |
| 1992 | 10 | 0 |
| 1993 | 3 | 0 |
| 1994 | 8 | 0 |
| 1995 | 12 | 0 |
| 1996 | 14 | 0 |
| 1997 | 14 | 0 |
| 1998 | 12 | 0 |
| 1999 | 16 | 0 |
| 2000 | 13 | 0 |
| 2001 | 8 | 1 |
| 2002 | 6 | 6 |
| 2003 | 9 | 2 |
| 2004 | 4 | 5 |
| 2005 | 1 | 1 |
| 2006 | 3 | 11 |
| 2007 | 2 | 7 |
| 2008 | 3 | 3 |
| 2009 | 6 | 8 |
| 2010 | 2 | 4 |
| 2011 | 3 | 13 |
| 2012 | 1 | 10 |
| 2013 | 3 | 8 |
| 2014 | 6 | 12 |
| 2015 | 4 | 6 |
| 2016 | 6 | 14 |
| 2017 | 9 | 14 |
| 2018 | 6 | 10 |
| 2019 | 13 | 17 |
| 2020 | 15 | 9 |
| 2021 | 11 | 12 |
| 2022 | 4 | 12 |
| 2023 | 10 | 13 |
| 2024 | 7 | 10 |
| 2025 | 7 | 6 |
| 2026 | 2 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Adsorber, purification system, and purification method7 Apr 2026US 12,595,960 B2Air Products and Chemicals, Inc.
- Apparatus for precooling hydrogen for liquefaction using external liquid nitrogen and high pressure gaseous nitrogen24 Mar 2026US 12,584,686 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Method for obtaining one or more air products, and air fractionation plant9 Sep 2025US 12,410,974 B2Linde Aktiengesellschaft
- Air separation unit and method for cryogenic separation of air using a distillation column system including an intermediate pressure kettle column8 Jul 2025US 12,352,496 B2Praxair Technology, Inc.
- Integrated nitrogen liquefier for a nitrogen and argon producing cryogenic air separation unit11 Mar 2025US 12,247,783 B2Linde Aktiengesellschaft
- Process and apparatus for purifying air and cryogenic air separation process and plant20 Aug 2026US 2026/0243508 A1
- Air separation method and air separation device30 Jul 2026US 2026/0218981 A1Taiyo Nippon Sanso Corporation
- Method for cryogenic separation of air, and air separation plant16 Jul 2026US 2026/0202125 A1Linde Aktiengesellschaft
- Apparatus and process for low temperature regeneration of adsorbent material14 May 2026US 2026/0131276 A1Air Products and Chemicals, Inc.
- Liquid air energy conversion system and method5 Mar 2026US 2026/0063250 A1
Most cited
By later US patents
- Use of nitrogen from an air separation unit as gas turbine air compressor feed refrigerant to improve power output141US 5,388,395 AAir Products and Chemicals, Inc. · 1995
- Operation of an air separation process with a combustion engine for the production of atmospheric gas products and electric power99US 6,256,994 B1Air Products and Chemicals, Inc. · 2001
- Air separation process and system with gas turbine drivers97US 6,345,493 B1Air Products and Chemicals, Inc. · 2002
- Air separation process and system utilizing pressure-swing driers95US 3,967,464 AAir Products and Chemicals, Inc. · 1976
- Air separation process integrated with gas turbine combustion engine driver95US 6,263,659 B1Air Products and Chemicals, Inc. · 2001