C08J 5/2256
Based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon
Official title: {based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon bonds, e.g. obtained by polycondensation}
C08J5/2256 (Based on macromolecular compounds obtained by reactions other than those involving carbon-to-carbon) appears on 533 US grants and 712 published applications in this corpus.
Search patents in C08J- Granted patents
- 533
- Published applications
- 712
- Assignees
- 330
- Inventors
- 1,440
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 6 | 0 |
| 2001 | 3 | 3 |
| 2002 | 6 | 8 |
| 2003 | 5 | 17 |
| 2004 | 14 | 31 |
| 2005 | 11 | 37 |
| 2006 | 13 | 56 |
| 2007 | 14 | 50 |
| 2008 | 18 | 42 |
| 2009 | 29 | 53 |
| 2010 | 46 | 48 |
| 2011 | 42 | 40 |
| 2012 | 33 | 37 |
| 2013 | 29 | 16 |
| 2014 | 30 | 16 |
| 2015 | 20 | 22 |
| 2016 | 17 | 13 |
| 2017 | 19 | 43 |
| 2018 | 13 | 22 |
| 2019 | 28 | 16 |
| 2020 | 22 | 25 |
| 2021 | 16 | 14 |
| 2022 | 16 | 13 |
| 2023 | 13 | 17 |
| 2024 | 15 | 34 |
| 2025 | 15 | 26 |
| 2026 | 11 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Block copolymer, production method therefor, polymeric electrolyte material, polymeric electrolyte molded article, polymeric electrolyte film, electrolyte film equipped with catalyst layer, membrane electrode composite, solid polymer fuel cell, and water electrolysis type hydrogen generating device25 Aug 2026US 12,715,962 B2Toray Industries, Inc.
- Anion exchange polymers and membranes for electrolysis25 Aug 2026US 12,715,968 B2Uop LLC
- Composite high-temperature proton exchange membrane for fuel cell, preparation method therefor and use thereof25 Aug 2026US 12,719,071 B2Dalian Institute of Chemical Physics, Chinese Academy of Sciences
- Structured organic films containing imidazolium having cationic charge functionality and methods thereof21 Jul 2026US 12,686,743 B2Genesee Valley Innovations, LLC
- Method for producing anion exchange resin and method for producing electrolyte membrane12 May 2026US 12,624,157 B2Takahata Precision Co., Ltd.
- Composite ion-conducting membrane1 Oct 2026US 2026/0302300 A1Johnson Matthey Hydrogen Technologies Limited
- Polymer, electrolyte material, electrolyte membrane, electrolyte membrane with catalyst layer, membrane electrode assembly, solid polymer fuel cell, and solid polymer water electrolysis device13 Aug 2026US 2026/0237705 A1Tosoh Corporation
- High-temperature proton exchange membrane, preparation method and use thereof13 Aug 2026US 2026/0237706 A1China Northern Re (Group) High-Tech Co., Ltd.
- Tetra-coordinated boronic acid-functionalized polymers6 Aug 2026US 2026/0229572 A11s1 Energy, Inc.
- Proton exchange membrane material and methods of making the same30 Jul 2026US 2026/0221480 A1Rensselaer Polytechnic Institute
Most cited
By later US patents
- Proton conducting polymers used as membranes200US 5,525,436 ACase Western Reserve University · 1996
- Sulfonated polymers for solid polymer electrolytes99US 5,403,675 AMaxdem Incorporated · 1995
- Acid-modified polybenzimidazole fuel cell elements63US 5,599,639 AHoechst Celanese Corporation · 1997
- Monomer containing electron-withdrawing group and electron-donative group, and copolymer and proton-conductive membrane comprising same62US 6,794,480 B2Jsr Corporation · 2004
- Proton conducting polymers prepared by direct acid casting50US 5,716,727 ACase Western Reserve University · 1998