F25J 2215/30
Helium
F25J2215/30 (Helium) appears on 52 US grants and 39 published applications in this corpus.
Search patents in F25J- Granted patents
- 52
- Published applications
- 39
- Assignees
- 30
- Inventors
- 139
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 3 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 3 |
| 2014 | 3 | 1 |
| 2015 | 1 | 1 |
| 2016 | 1 | 2 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 4 | 3 |
| 2020 | 1 | 4 |
| 2021 | 2 | 3 |
| 2022 | 1 | 0 |
| 2023 | 0 | 3 |
| 2024 | 1 | 3 |
| 2025 | 2 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
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
- 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
- Helium gas liquefier and method for liquefying helium gas23 Apr 2024US 11,965,693 B2Korea Basic Science Institute
- Cryogenic process for helium recovery from low helium-containing gas stream24 Sep 2026US 2026/0287252 A1Council of Scientific and Industrial Research
- System for purifying helium gas, method, and application20 Feb 2025US 2025/0060157 A1Changqing Engineering Design Co., Ltd.
- Cryogenic Neon Purification System and Method2 Jan 2025US 2025/0003677 A1Chart Energy & Chemicals, Inc.
- Helium separation and recovery process17 Oct 2024US 2024/0343578 A1Arjae Design Solutions Ltd.
- Method and apparatus for separation of helium-3 from helium-4 by means of a cryogenic process8 Aug 2024US 2024/0261731 A1Linde Aktiengesellschaft
Most cited
By later US patents
- Process for the purification of the inert gases34US 5,204,075 AThe BOC Group, Inc. · 1993
- Parallel wrapped tube heat exchanger26US 4,785,879 AAPD Cryogenics, Inc. · 1988
- Nitrogen production method24US 4,617,037 ANippon Sanso Corporation · 1986
- Process and device for the preparation of a flow which is substantially purified with respect to at least one of the impurities oxygen and carbon monoxide22US 5,685,172 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1997
- Process and device for the preparation of a cry ogenic fluid in the high purity liquid state17US 5,784,898 AL Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude · 1998