C01B 13/02
Preparation of oxygen
Official title: Preparation of oxygen (by liquefying F25J)
C01B13/02 (Preparation of oxygen) appears on 1,646 US grants and 1,608 published applications in this corpus.
Search patents in C01B- Granted patents
- 1,646
- Published applications
- 1,608
- Assignees
- 925
- Inventors
- 3,685
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 17 | 0 |
| 1978 | 16 | 0 |
| 1979 | 7 | 0 |
| 1980 | 6 | 0 |
| 1981 | 12 | 0 |
| 1982 | 15 | 0 |
| 1983 | 6 | 0 |
| 1984 | 12 | 0 |
| 1985 | 13 | 0 |
| 1986 | 15 | 0 |
| 1987 | 16 | 0 |
| 1988 | 17 | 0 |
| 1989 | 14 | 0 |
| 1990 | 13 | 0 |
| 1991 | 18 | 0 |
| 1992 | 21 | 0 |
| 1993 | 18 | 0 |
| 1994 | 18 | 0 |
| 1995 | 28 | 0 |
| 1996 | 29 | 0 |
| 1997 | 34 | 0 |
| 1998 | 38 | 0 |
| 1999 | 52 | 0 |
| 2000 | 55 | 0 |
| 2001 | 41 | 16 |
| 2002 | 50 | 40 |
| 2003 | 46 | 40 |
| 2004 | 30 | 52 |
| 2005 | 26 | 67 |
| 2006 | 34 | 119 |
| 2007 | 33 | 75 |
| 2008 | 47 | 69 |
| 2009 | 40 | 81 |
| 2010 | 47 | 93 |
| 2011 | 48 | 83 |
| 2012 | 56 | 69 |
| 2013 | 67 | 89 |
| 2014 | 56 | 88 |
| 2015 | 75 | 61 |
| 2016 | 50 | 61 |
| 2017 | 49 | 65 |
| 2018 | 54 | 64 |
| 2019 | 48 | 51 |
| 2020 | 58 | 59 |
| 2021 | 38 | 45 |
| 2022 | 33 | 47 |
| 2023 | 37 | 49 |
| 2024 | 24 | 64 |
| 2025 | 38 | 43 |
| 2026 | 17 | 18 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 13/0229Purification or separation processes1,013
- C01B 13/0203From inorganic compounds528
- C01B 13/0296Generators releasing in a self-sustaining way pure oxygen from a solid charge79
- C01B 13/0222From organic compounds16
- C01B 13/08From air with the aid of metal oxides11
- C01B 13/0292Preparation from air using a molten phase containing alkali metal nitrite, optionally10
Recent patents
- Oxygen transport membrane reactors for decarbonization25 Aug 2026US 12,715,765 B2Praxair Technology, Inc.
- Data processing device and gas conversion system25 Aug 2026US 12,715,825 B2Kabushiki Kaisha Toshiba
- Apparatus and method for isolating hydrogen from water11 Aug 2026US 12,703,628 B2Rtx Corporation
- Flexible artificial leaves for hydrogen production and methods for making4 Aug 2026US 12,697,599 B2King Abdullah University of Science and Technology
- Catalytic decomposition reactors28 Jul 2026US 12,692,824 B2Firehawk Aerospace, Inc.
- Hydrogen and oxygen generation using detonation waves1 Oct 2026US 2026/0296883 A1Green Constellation Inc.
- Oxygen concentrator assembled with quick-detach molecular sieve10 Sep 2026US 2026/0263997 A1
- A vessel for a gas treatment unit and associated method16 Jul 2026US 2026/0199817 A1Atlas Copco Airpower, Naamloze Vennootschap
- High efficiency electro-photocatalysts16 Jul 2026US 2026/0199827 A1
- Wearable co2 adsorption and decomposition system and methods of implementing the same25 Jun 2026US 2026/0175169 A1
Most cited
By later US patents
- Methanol plant retrofit for acetic acid manufacture208US 6,232,352 B1Acetex limited · 2001
- Solid multi-component membranes, electrochemical reactor components, electrochemical reactors and use of membranes, reactor components, and reactor for oxidation reactions202US 5,306,411 AThe Standard Oil Company · 1994
- Hydrogen generation by hydrolysis of hydrides for undersea vehicle fuel cell energy systems197US 5,372,617 AThe Charles Stark Draper Laboratory, Inc. · 1994
- Method for the preparation and delivery of gas-enriched fluids188US 6,180,059 B2TherOx, Inc. · 2001
- High temperature fuel cell power plant165US 7,097,925 B2QuestAir Technologies Inc. · 2006