C08J 5/2275
Heterogeneous membranes
Official title: {Heterogeneous membranes}
C08J5/2275 (Heterogeneous membranes) appears on 371 US grants and 358 published applications in this corpus.
Search patents in C08J- Granted patents
- 371
- Published applications
- 358
- Assignees
- 247
- Inventors
- 989
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 2 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 6 | 0 |
| 1984 | 8 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 10 | 0 |
| 1988 | 2 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 3 | 0 |
| 1999 | 6 | 0 |
| 2000 | 7 | 0 |
| 2001 | 5 | 2 |
| 2002 | 9 | 15 |
| 2003 | 8 | 19 |
| 2004 | 7 | 24 |
| 2005 | 11 | 27 |
| 2006 | 10 | 30 |
| 2007 | 10 | 19 |
| 2008 | 11 | 19 |
| 2009 | 16 | 20 |
| 2010 | 15 | 20 |
| 2011 | 16 | 16 |
| 2012 | 19 | 14 |
| 2013 | 10 | 11 |
| 2014 | 9 | 7 |
| 2015 | 13 | 8 |
| 2016 | 8 | 12 |
| 2017 | 6 | 15 |
| 2018 | 9 | 6 |
| 2019 | 10 | 9 |
| 2020 | 7 | 6 |
| 2021 | 7 | 9 |
| 2022 | 5 | 8 |
| 2023 | 5 | 11 |
| 2024 | 11 | 13 |
| 2025 | 7 | 9 |
| 2026 | 5 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Composite ion exchange membrane and method of making same28 Apr 2026US 12,612,496 B2
- Single-ion electrolytes for solid-state alkaline batteries14 Apr 2026US 12,603,388 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Bipolar membrane10 Mar 2026US 12,569,812 B2Astom Corporation
- Bipolar membrane and process for producing the same20 Jan 2026US 12,528,051 B2Astom Corporation
- Composite membrane6 Jan 2026US 12,515,175 B2FUJIFILM Corporation
- Polymerizable composition, ion exchange resin, ion exchange membrane, membrane electrode assembly, and hydrogen production device8 Oct 2026US 2026/0308295 A1Tokuyama Corporation
- Composite ion-conducting membrane1 Oct 2026US 2026/0302300 A1Johnson Matthey Hydrogen Technologies Limited
- Single-ion electrolytes for solid-state alkaline batteries24 Sep 2026US 2026/0291007 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Membrane, membrane electrode assembly, and water electrolysis apparatus30 Jul 2026US 2026/0218402 A1Institute of Science Tokyo
- Electrolyte membrane including polyfluorene-based ionomer and manufacturing method thereof11 Jun 2026US 2026/0159627 A1Hyundai Motor Company
Most cited
By later US patents
- Electrolytic cell with composite, porous diaphragm164US 5,183,545 A1993
- Composite solid polymer electrolyte membranes158US 6,248,469 B1Foster-Miller, Inc. · 2001
- Polymer electrolyte membranes from mixed dispersions132US 6,277,512 B13M Innovative Properties Company · 2001
- Immobilized electrolyte membrane91US 4,849,311 AToa Nenryo Kogyo Kabushiki Kaisha · 1989
- Ion-exchange structures of copolymer blends useful in electrolytic cells88US 4,176,215 AE. I. Du Pont de Nemours and Company · 1979