C01B 13/0229
Purification or separation processes
Official title: {Purification or separation processes}
C01B13/0229 (Purification or separation processes) appears on 1,013 US grants and 893 published applications in this corpus.
Search patents in C01B- Granted patents
- 1,013
- Published applications
- 893
- Assignees
- 512
- Inventors
- 2,140
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 4 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 6 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 3 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 14 | 0 |
| 1992 | 19 | 0 |
| 1993 | 11 | 0 |
| 1994 | 10 | 0 |
| 1995 | 20 | 0 |
| 1996 | 24 | 0 |
| 1997 | 23 | 0 |
| 1998 | 26 | 0 |
| 1999 | 41 | 0 |
| 2000 | 41 | 0 |
| 2001 | 28 | 11 |
| 2002 | 35 | 27 |
| 2003 | 36 | 27 |
| 2004 | 20 | 30 |
| 2005 | 13 | 40 |
| 2006 | 23 | 87 |
| 2007 | 24 | 47 |
| 2008 | 36 | 46 |
| 2009 | 28 | 56 |
| 2010 | 37 | 55 |
| 2011 | 32 | 54 |
| 2012 | 37 | 39 |
| 2013 | 44 | 47 |
| 2014 | 43 | 47 |
| 2015 | 42 | 35 |
| 2016 | 32 | 32 |
| 2017 | 30 | 34 |
| 2018 | 28 | 22 |
| 2019 | 25 | 22 |
| 2020 | 27 | 30 |
| 2021 | 18 | 23 |
| 2022 | 19 | 20 |
| 2023 | 13 | 23 |
| 2024 | 8 | 18 |
| 2025 | 14 | 12 |
| 2026 | 5 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Oxygen transport membrane reactors for decarbonization25 Aug 2026US 12,715,765 B2Praxair Technology, Inc.
- Method and system of thermolysis based hydrogen and oxygen generation21 Jul 2026US 12,686,615 B2Cosmic Energy Power Inc.
- Household oxygen generator19 May 2026US 12,629,628 B2Shenzhen Harveymed Technology Co., LTD.
- Oxygen partial pressure regulation by use of organic oxygen-buffering materials such as transition metal salens in hermetically sealed electronic devices environment and related assemblies and methods17 Mar 2026US 12,580,006 B2Western Digital Technologies, Inc.
- Modular pressure-swing adsorption system17 Feb 2026US 12,551,838 B2Generon IGS, 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
- Method for reducing the global greenhouse effect30 Apr 2026US 2026/0114386 A1
- Separation membrane, separation membrane layered body, separation module or separation tower, hydrogen recovery system, and hydrogen separation and recovery method30 Apr 2026US 2026/0115671 A1Japan Technological Research Association of Artificial Photosynthetic Chemical Process
- Reactor System and Method of Operating16 Apr 2026US 2026/0102754 A1Aerospace Carbon Solutions LLC
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
- High temperature fuel cell power plant165US 7,097,925 B2QuestAir Technologies Inc. · 2006
- Synthesis gas production by mixed conducting membranes with integrated conversion into liquid products162US 6,114,400 AAir Products and Chemicals, Inc. · 2000
- Portable oxygen concentrator151US 6,520,176 B1L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2003