C08G 59/42
Polycarboxylic acids
Official title: Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
C08G59/42 (Polycarboxylic acids) appears on 1,191 US grants and 1,131 published applications in this corpus.
Search patents in C08G- Granted patents
- 1,191
- Published applications
- 1,131
- Assignees
- 577
- Inventors
- 3,191
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 37 | 0 |
| 1977 | 32 | 0 |
| 1978 | 43 | 0 |
| 1979 | 26 | 0 |
| 1980 | 11 | 0 |
| 1981 | 20 | 0 |
| 1982 | 15 | 0 |
| 1983 | 23 | 0 |
| 1984 | 20 | 0 |
| 1985 | 26 | 0 |
| 1986 | 17 | 0 |
| 1987 | 27 | 0 |
| 1988 | 25 | 0 |
| 1989 | 24 | 0 |
| 1990 | 16 | 0 |
| 1991 | 16 | 0 |
| 1992 | 14 | 0 |
| 1993 | 15 | 0 |
| 1994 | 8 | 0 |
| 1995 | 10 | 0 |
| 1996 | 18 | 0 |
| 1997 | 19 | 0 |
| 1998 | 17 | 0 |
| 1999 | 27 | 0 |
| 2000 | 15 | 0 |
| 2001 | 27 | 5 |
| 2002 | 28 | 20 |
| 2003 | 25 | 26 |
| 2004 | 14 | 38 |
| 2005 | 16 | 30 |
| 2006 | 15 | 19 |
| 2007 | 12 | 29 |
| 2008 | 7 | 29 |
| 2009 | 10 | 39 |
| 2010 | 11 | 54 |
| 2011 | 34 | 50 |
| 2012 | 24 | 55 |
| 2013 | 30 | 49 |
| 2014 | 31 | 55 |
| 2015 | 35 | 54 |
| 2016 | 41 | 51 |
| 2017 | 41 | 67 |
| 2018 | 32 | 44 |
| 2019 | 42 | 61 |
| 2020 | 32 | 58 |
| 2021 | 40 | 36 |
| 2022 | 20 | 58 |
| 2023 | 26 | 60 |
| 2024 | 24 | 53 |
| 2025 | 34 | 49 |
| 2026 | 19 | 42 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C08G 59/4246Polymers with carboxylic terminal groups224
- C08G 59/4215Cycloaliphatic190
- C08G 59/4284Together with other curing agents146
- C08G 59/4223Aromatic105
- C08G 59/4207Aliphatic92
- C08G 59/4292Together with monocarboxylic acids76
- C08G 59/4238Heterocyclic65
- C08G 59/423Containing an atom other than oxygen belonging to a functional groups to52
Recent patents
- Epoxy resin composition and ignition coil25 Aug 2026US 12,715,959 B2KYOCERA Corporation
- Epoxy-based resin composition for clear fiber composites and epoxy-based clear fiber composites18 Aug 2026US 12,709,668 B2Kaneka Americas Holding, Inc.
- Resin composition18 Aug 2026US 12,709,682 B2Ajinomoto Co., Inc.
- Flux-compatible epoxy-anhydride adhesives compositions for low-gap underfill applications11 Aug 2026US 12,703,815 B2Henkel AG & Co. KGaA
- Method for producing polymer4 Aug 2026US 12,698,361 B2Nissan Chemical Corporation
- Syntactic foam compositions1 Oct 2026US 2026/0297388 A1PRC-DeSoto International, Inc.
- Heat-curing epoxy resin composition suitable for low curing temperature with good storage stability24 Sep 2026US 2026/0286039 A1Sika Technology AG
- Adhesive17 Sep 2026US 2026/0275175 A1Lohmann GmbH & Co. KG
- Vegetable oil-derivative epoxy compositions having improved performance10 Sep 2026US 2026/0265447 A1Washington State University
- Thermosetting resin composition, cured product, and flexible printed board27 Aug 2026US 2026/0250500 A1Resonac Corporation
Most cited
By later US patents
- 4,4'-Isopropylidene-bis(3- and 4-phenyleneoxyphthalic anhydride)129US 3,972,902 AGeneral Electric Company · 1976
- Activatable material115US 6,846,559 B2L&L Products, Inc. · 2005
- Water-borne coating composition made from epoxy resin, polymeric acid and tertiary amine111US 4,247,439 AE. I. Du Pont de Nemours and Company · 1981
- Crosslinkable compositions containing polyepoxides and polyacid curing agents109US 4,764,430 APPG Industries, Inc. · 1988
- Composition comprising silicone epoxy resin, hydroxyl compound, anhydride and curing catalyst82US 6,632,892 B2General Electric Company · 2003