C07C 7/144
Purification: using membranes
Official title: using membranes, e.g. selective permeation
C07C7/144 (Purification: using membranes) appears on 292 US grants and 303 published applications in this corpus.
Search patents in C07C- Granted patents
- 292
- Published applications
- 303
- Assignees
- 153
- Inventors
- 735
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 8 | 0 |
| 1991 | 9 | 0 |
| 1992 | 8 | 0 |
| 1993 | 5 | 0 |
| 1994 | 2 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 1 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 4 |
| 2003 | 2 | 2 |
| 2004 | 2 | 13 |
| 2005 | 1 | 6 |
| 2006 | 5 | 6 |
| 2007 | 4 | 9 |
| 2008 | 6 | 9 |
| 2009 | 8 | 10 |
| 2010 | 5 | 3 |
| 2011 | 5 | 9 |
| 2012 | 3 | 7 |
| 2013 | 5 | 6 |
| 2014 | 5 | 18 |
| 2015 | 9 | 11 |
| 2016 | 9 | 12 |
| 2017 | 6 | 19 |
| 2018 | 17 | 24 |
| 2019 | 26 | 15 |
| 2020 | 10 | 21 |
| 2021 | 13 | 26 |
| 2022 | 19 | 14 |
| 2023 | 14 | 25 |
| 2024 | 13 | 13 |
| 2025 | 9 | 11 |
| 2026 | 17 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas separation system and method for producing methane-enriched gas15 Sep 2026US 12,734,474 B2Ube Corporation
- System and method for separating a gas mixture25 Aug 2026US 12,714,968 B2Haffmans B.V.
- Facility and method for producing biomethane with limited methane loss and limited CO2 emissions30 Jun 2026US 12,667,805 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Copoly(1,2,4-triazole)s membranes for sour mixed-gas separation applications30 Jun 2026US 12,668,659 B2Saudi Arabian Oil Company
- Membrane-based separation processes enhanced with an absorption device23 Jun 2026US 12,662,437 B2ExxonMobil Chemical Patents Inc.
- Systems and methods for using facilitated transport membranes to separate olefins and paraffins8 Oct 2026US 2026/0308087 A1
- Method for upgrading bio-based material and upgraded material10 Sep 2026US 2026/0265614 A1Neste Oyj
- System and method for integrated livestock methane capture, processing, and conversion to high-value products13 Aug 2026US 2026/0234083 A1Planet.Tech
- Method and apparatus for treating a hydrocarbon mixture6 Aug 2026US 2026/0225975 A1Linde Aktiengesellschaft
- Low Temperature Membrane System for Biogas Upgrading11 Jun 2026US 2026/0159462 A1Air Products and Chemicals, Inc.
Most cited
By later US patents
- Process for separating components of a gas stream137US 4,701,187 AAir Products and Chemicals, Inc. · 1987
- Removal of H.sub.2 S and/or CO.sub.2 from a light hydrocarbon stream by use of gas permeable membrane101US 4,130,403 A1978
- Composite membranes, processes for their preparation and their use95US 4,968,430 ABayer Aktiengesellschaft · 1990
- Natural gas separation using nitrogen-selective membranes of modest selectivity91US 6,572,678 B1Membrane Technology and Research, Inc. · 2003
- Fluorinated polyolefin membranes for aromatics/saturates separation85US 5,396,019 AExxon Research & Engineering Co. · 1995