F25J 3/0655
Separation of hydrogen
Official title: {separation of hydrogen (production of hydrogen containing gas in general C01B3/00, e.g. separation of hydrogen or hydrogen containing gases form gaseous mixtures at low temperatures C01B3/506)}
F25J3/0655 (Separation of hydrogen) appears on 85 US grants and 103 published applications in this corpus.
Search patents in F25J- Granted patents
- 85
- Published applications
- 103
- Assignees
- 60
- Inventors
- 236
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 1 | 1 |
| 2006 | 1 | 3 |
| 2007 | 2 | 2 |
| 2008 | 1 | 0 |
| 2009 | 0 | 3 |
| 2010 | 1 | 4 |
| 2011 | 0 | 11 |
| 2012 | 3 | 11 |
| 2013 | 3 | 3 |
| 2014 | 0 | 0 |
| 2015 | 4 | 4 |
| 2016 | 1 | 5 |
| 2017 | 3 | 3 |
| 2018 | 0 | 7 |
| 2019 | 7 | 5 |
| 2020 | 2 | 4 |
| 2021 | 3 | 6 |
| 2022 | 4 | 6 |
| 2023 | 6 | 5 |
| 2024 | 5 | 8 |
| 2025 | 3 | 5 |
| 2026 | 6 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method and system for separating a gas mixture25 Aug 2026US 12,714,965 B2Linde Aktiengesellschaft
- Method and system for efficient hydrogen compression11 Aug 2026US 12,704,116 B2Nuovo Pignone Tecnologie Srl
- Method and device for washing and purification with low-temperature methanol16 Jun 2026US 12,655,022 B2Dalian Jiachun Gas Purification Technology Development Co., Ltd
- Process and apparatus for separating a mixture of hydrogen and carbon dioxide19 May 2026US 12,629,630 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Enhanced hydrogen recovery utilizing gas separation membranes integrated with pressure swing adsorption unit and/or cryogenic separation system31 Mar 2026US 12,589,994 B2Lummus Technology Inc.
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- Carbon dioxide separation plant using external refrigeration circuit, and method13 Aug 2026US 2026/0235355 A1Nuovo Pignone Tecnologie Srl
- Method and apparatus for liquefying and/or separating a mixture containing co230 Jul 2026US 2026/0217528 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Liquefaction of natural gas feeds containing hydrogen5 Mar 2026US 2026/0063359 A1Honeywell Lng LLC
- Simultaneous carbon dioxide and hydrogen recovery from the tail gas stream of a sulfur recovery unit19 Feb 2026US 2026/0048362 A1Saudi Arabian Oil Company
Most cited
By later US patents
- Process for recovering hydrogen from a multi-component gas stream113US 4,654,063 AAir Products and Chemicals, Inc. · 1987
- Autorefrigeration separation of carbon dioxide59US 6,301,927 B12001
- Method and apparatus for separating C.sub.4 hydrocarbons from a gaseous mixture34US 5,329,774 ALiquid Air Engineering Corporation · 1994
- Steam cracker gas separation process33US 5,785,739 AMembrane Technology and Research, Inc. · 1998
- Cryogenic recovery of liquids from refinery off-gases28US 4,356,014 APetrochem Consultants, Inc. · 1982