B01D 2257/104
Oxygen
B01D2257/104 (Oxygen) appears on 903 US grants and 909 published applications in this corpus.
Search patents in B01D- Granted patents
- 903
- Published applications
- 909
- Assignees
- 522
- Inventors
- 2,181
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 2 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 8 | 0 |
| 1984 | 10 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 10 | 0 |
| 1989 | 4 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 7 | 0 |
| 1996 | 7 | 0 |
| 1997 | 9 | 0 |
| 1998 | 24 | 0 |
| 1999 | 28 | 0 |
| 2000 | 19 | 0 |
| 2001 | 18 | 5 |
| 2002 | 25 | 14 |
| 2003 | 20 | 16 |
| 2004 | 6 | 12 |
| 2005 | 6 | 22 |
| 2006 | 10 | 18 |
| 2007 | 15 | 11 |
| 2008 | 13 | 18 |
| 2009 | 10 | 24 |
| 2010 | 17 | 32 |
| 2011 | 17 | 20 |
| 2012 | 18 | 22 |
| 2013 | 24 | 25 |
| 2014 | 15 | 32 |
| 2015 | 25 | 40 |
| 2016 | 31 | 41 |
| 2017 | 39 | 51 |
| 2018 | 51 | 51 |
| 2019 | 38 | 69 |
| 2020 | 59 | 73 |
| 2021 | 44 | 64 |
| 2022 | 40 | 50 |
| 2023 | 48 | 57 |
| 2024 | 49 | 49 |
| 2025 | 49 | 55 |
| 2026 | 17 | 38 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Complex oxides for reactive oxygen separation and related applications6 Oct 2026US 12,752,260 B2North Carolina State University
- Analysis device and analysis method for quality index of natural gas product and application6 Oct 2026US 12,754,171 B2PetroChina Company Limited
- Analysis system and method for impurity components in perfluoropropane22 Sep 2026US 12,742,752 B2Lansis Instrument (Shanghai) Co., Ltd
- System and method for purifying hydrogen, and system for producing hydrogen by water electrolysis11 Aug 2026US 12,702,949 B2Wuxi Longi Hydrogen Technology Co., Ltd.
- Method for removing CO2 from a CO2-containing stream28 Jul 2026US 12,691,402 B2Shell USA, Inc.
- Gas turbine engine fuel system8 Oct 2026US 2026/0306970 A1General Electric Company
- Gas processing device and gas production method8 Oct 2026US 2026/0307003 A1Hirata Corporation
- Catalytic reactor and system for purification of carbon dioxide streams and methods of using the same8 Oct 2026US 2026/0307007 A1Oxy Low Carbon Ventures, LLC
- Co2 and h2o co-electrolyser system8 Oct 2026US 2026/0308775 A1Ecole Polytechnique Federale De Lausanne (Epfl)
- Purge device and production method for separation membrane1 Oct 2026US 2026/0295514 A1Mitsubishi Heavy Industries, Ltd.
Most cited
By later US patents
- Membrane based fuel deoxygenator394US 6,315,815 B1United Technologies Corporation · 2001
- Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source139US 6,866,950 B2QuestAir Technologies Inc. · 2005
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Hypoxic room system and equipment for Hypoxic training and therapy at standard atmospheric pressure123US 5,799,652 AHypoxico Inc. · 1998
- Power generation process with partial recycle of carbon dioxide113US 8,220,248 B2Membrane Technology and Research, Inc. · 2012