F25J 3/028
Separation of noble gases
Official title: {separation of noble gases (from air F25J3/04642; in general C01B23/00)}
F25J3/028 (Separation of noble gases) appears on 153 US grants and 115 published applications in this corpus.
Search patents in F25J- Granted patents
- 153
- Published applications
- 115
- Assignees
- 61
- Inventors
- 327
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 5 | 0 |
| 1988 | 7 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 3 | 0 |
| 1998 | 5 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 7 | 0 |
| 2002 | 2 | 3 |
| 2003 | 1 | 3 |
| 2004 | 4 | 4 |
| 2005 | 1 | 1 |
| 2006 | 0 | 3 |
| 2007 | 2 | 3 |
| 2008 | 3 | 13 |
| 2009 | 2 | 3 |
| 2010 | 2 | 3 |
| 2011 | 6 | 3 |
| 2012 | 2 | 5 |
| 2013 | 4 | 3 |
| 2014 | 5 | 5 |
| 2015 | 1 | 2 |
| 2016 | 2 | 5 |
| 2017 | 3 | 7 |
| 2018 | 8 | 15 |
| 2019 | 8 | 3 |
| 2020 | 3 | 6 |
| 2021 | 4 | 7 |
| 2022 | 3 | 3 |
| 2023 | 2 | 6 |
| 2024 | 2 | 2 |
| 2025 | 3 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System for purifying helium gas, method, and application28 Jul 2026US 12,693,071 B2Changqing Engineering Design Co., Ltd.
- Cryogenic process for crude helium recovery from natural gas12 May 2026US 12,623,905 B2Council of Scientific and Industrial Research
- Waste argon separation system and method capable of reducing emission of cryogenic waste argon26 Aug 2025US 12,398,952 B2Shanghai Lifengas Co., Ltd
- 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
- Cryogen chamber with adsorber7 Jan 2025US 12,186,699 B1Lunar Helium-3 Mining, LLC
- Cryogenic process for helium recovery from low helium-containing gas stream24 Sep 2026US 2026/0287252 A1Council of Scientific and Industrial Research
- Single Column Nitrogen Rejection Unit20 Aug 2026US 2026/0243507 A1Chart Energy & Chemicals, Inc.
- Process for dehydration of a gas stream prior to cryogenic co2 fractionation7 May 2026US 2026/0126246 A1Uop LLC
- Process and apparatus for the production of ammonia synthesis gas16 Oct 2025US 2025/0321050 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Waste argon separation system and method capable of reducing emission of cryogenic waste argon20 Mar 2025US 2025/0093095 A1Shanghai Lifengas Co., Ltd
Most cited
By later US patents
- Integrated air separation process103US 6,282,901 B1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 2001
- Absorption process without external solvent97US 5,462,583 AAdvanced Extraction Technologies, Inc. · 1995
- Integrated air separation and power generation process95US 6,745,573 B2American Air Liquide, Inc. · 2004
- Integrated processing of natural gas into liquid products87US 6,743,829 B2BP Corporation North America Inc. · 2004
- Integrated processing of natural gas into liquid products84US 7,168,265 B2BP Corporation North America Inc. · 2007