C01B 23/0047
Characterised by the membrane
Official title: {characterised by the membrane}
C01B23/0047 (Characterised by the membrane) appears on 20 US grants and 22 published applications in this corpus.
Search patents in C01B- Granted patents
- 20
- Published applications
- 22
- Assignees
- 24
- Inventors
- 74
- Latest grant
- 1 Oct 2019
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 2 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 2 |
| 2015 | 0 | 2 |
| 2016 | 3 | 4 |
| 2017 | 2 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 1 |
| 2025 | 0 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Chemically and UV cross-linked high selectivity polyimide membranes for gas separations1 Oct 2019US 10,427,110 B2
- Isotopic enrichment of helium-3 through glass26 Jun 2018US 10,005,033 B2Pacific Environment Technologies, LLC
- Fluid separation processes using membranes based on fluorinated and perfluorinated polymers22 May 2018US 9,975,084 B2Membrane Technology and Research, Inc.
- Gas separation membranes based on fluorinated and perfluorinated polymers2 May 2017US 9,636,632 B2Membrane Technology and Research, Inc.
- Integrated process and apparatus for recovery of helium rich streams18 Apr 2017US 9,623,370 B2Praxair Technology, Inc.
- Multi-stage hydrogen/helium separation using hydrogen-selective membranes11 Jun 2026US 2026/0158436 A1Hydrogen Onsite, S.L.
- Helium recovery from the natural gas in petrochemical plants12 Jun 2025US 2025/0187919 A1
- Hollow Fiber Membranes and Preparation Method and Use Thereof5 Jun 2025US 2025/0177925 A1China Petroleum & Chemical Corporation
- Polyimide copolymers and membranes, preparation methods and uses thereof as well as systems and methods for purifying helium gas3 Oct 2024US 2024/0327574 A1Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
- Thermally rearranged polymer gas separation membrane having fluorinated cross-linked structure, and preparation method therefor15 Aug 2019US 2019/0247784 A1Industry-University Cooperation Foundation Hanyang University
Most cited
By later US patents
- In-situ crystallized zeolite containing composition (LAI-ISC)46US 5,895,769 AExxon Research & Engineering Co. · 1999
- Membrane for separation of xenon from oxygen and nitrogen and method of using same39US 6,168,649 AMG Generon, Inc. · 2001
- Method of preparing high purity light gas by multiple-step gas separation32US 5,064,446 AUbe Industries, Ltd. · 1991
- Filter material and process for producing No.sub.2 -free gases or liquids25US 5,846,297 ATicona LLC · 1998
- Retention of noble gases in the exhaled air of ventilated patients by membrane separation22US 8,763,610 B22014