F25J 3/0252
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)}
F25J3/0252 (Separation of hydrogen) appears on 302 US grants and 279 published applications in this corpus.
Search patents in F25J- Granted patents
- 302
- Published applications
- 279
- Assignees
- 127
- Inventors
- 556
- Latest grant
- 9 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 4 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 7 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 7 | 0 |
| 1988 | 8 | 0 |
| 1989 | 3 | 0 |
| 1990 | 6 | 0 |
| 1991 | 4 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 8 | 0 |
| 1995 | 10 | 0 |
| 1996 | 3 | 0 |
| 1997 | 7 | 0 |
| 1998 | 6 | 0 |
| 1999 | 5 | 0 |
| 2000 | 10 | 0 |
| 2001 | 9 | 1 |
| 2002 | 7 | 10 |
| 2003 | 8 | 4 |
| 2004 | 4 | 3 |
| 2005 | 2 | 8 |
| 2006 | 3 | 12 |
| 2007 | 4 | 10 |
| 2008 | 10 | 7 |
| 2009 | 5 | 11 |
| 2010 | 4 | 18 |
| 2011 | 6 | 19 |
| 2012 | 8 | 21 |
| 2013 | 11 | 4 |
| 2014 | 9 | 7 |
| 2015 | 5 | 6 |
| 2016 | 3 | 14 |
| 2017 | 6 | 10 |
| 2018 | 8 | 10 |
| 2019 | 10 | 12 |
| 2020 | 6 | 12 |
| 2021 | 10 | 17 |
| 2022 | 9 | 16 |
| 2023 | 13 | 13 |
| 2024 | 7 | 14 |
| 2025 | 9 | 10 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Biomass pyrolysis integrated with bio-reduction of metal ores, hydrogen production, and/or activated-carbon production9 Jun 2026US 12,649,959 B2Carbon Technology Holdings, LLC
- Process for separating hydrogen from an olefin hydrocarbon effluent vapor stream2 Jun 2026US 12,643,067 B2Enflex, Inc.
- Dehydrogenation and pyrolysis product recovery with a common refrigerant2 Jun 2026US 12,643,843 B2Uop LLC
- 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
- Separation of hydrogen, methane, ethane, and propane in naphtha to ethane and propane fractionation section based on a dividing wall fractionation column integration12 May 2026US 12,623,980 B2Uop LLC
- Method and plant for separation of carbon dioxide (co2)27 Aug 2026US 2026/0251390 A1Aker Carbon Capture Norway AS
- 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
- Process and apparatus for removing co2 from a gasification syngas16 Jul 2026US 2026/0200728 A1L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Process and apparatus for producing ultra pure co2 in a carbon capture process2 Jul 2026US 2026/0184577 A1Uop LLC
- Low-temperature distillation method for capturing carbon dioxide11 Jun 2026US 2026/0160489 A1Shihezi University
Most cited
By later US patents
- Low pressure process for C.sub.3.sup.+ liquids recovery from process product gas213US 4,734,115 AAir Products and Chemicals, Inc. · 1988
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001
- Cryogenic separation of gaseous mixtures99US 4,900,347 AMobil Corporation · 1990
- Hydrogen and carbon dioxide coproduction88US 6,500,241 B2Fluor Corporation · 2002
- Purification of carbon dioxide77US 7,819,951 B2Air Products and Chemicals, Inc. · 2010