C08G 63/42
Cyclic ethers
Official title: Cyclic ethers (C08G59/00 takes precedence); Cyclic carbonates; Cyclic sulfites; Cyclic orthoesters
C08G63/42 (Cyclic ethers) appears on 181 US grants and 147 published applications in this corpus.
Search patents in C08G- Granted patents
- 181
- Published applications
- 147
- Assignees
- 142
- Inventors
- 519
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 16 | 0 |
| 1979 | 2 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 5 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 7 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 2 |
| 2004 | 0 | 3 |
| 2005 | 1 | 3 |
| 2006 | 2 | 5 |
| 2007 | 3 | 4 |
| 2008 | 1 | 3 |
| 2009 | 1 | 2 |
| 2010 | 1 | 5 |
| 2011 | 2 | 1 |
| 2012 | 2 | 4 |
| 2013 | 4 | 2 |
| 2014 | 3 | 4 |
| 2015 | 4 | 6 |
| 2016 | 5 | 5 |
| 2017 | 4 | 5 |
| 2018 | 3 | 8 |
| 2019 | 4 | 11 |
| 2020 | 4 | 10 |
| 2021 | 5 | 18 |
| 2022 | 10 | 14 |
| 2023 | 9 | 7 |
| 2024 | 8 | 9 |
| 2025 | 10 | 8 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing polyester resin by using regenerated bis(2-hydroxyethyl) terephthalate aqueous solution23 Jun 2026US 12,662,585 B2SK Chemicals Co., Ltd.
- Renewable monomer and polymer thereof5 May 2026US 12,617,800 B2Ecole Polytechnique Federale De Lausanne (Epfl)
- Polymer resin compound, method for producing same, and photosensitive resin composition comprising same17 Mar 2026US 12,577,393 B2LG Chem.Ltd.
- Resin, preparation method therefor, resin composition, and molded article6 Jan 2026US 12,516,151 B2LG Chem.Ltd.
- Polyester resin28 Oct 2025US 12,454,597 B2Mitsubishi Chemical Corporation
- Fabric and home care composition comprising a polyester17 Sep 2026US 2026/0275244 A1The Procter & Gamble Company
- Cavity forming composition27 Aug 2026US 2026/0250517 A1Nissan Chemical Corporation
- Polyester resin, method for manufacturing same, and article produced therefrom16 Jul 2026US 2026/0201113 A1SK Chemicals Co., Ltd.
- Process for the production of a high molecular weight polyester (co)polymer11 Jun 2026US 2026/0159646 A1Avantium Knowledge Centre B.V.
- Process for the production of a high molecular weight polyester (co)polymer11 Jun 2026US 2026/0159664 A1Avantium Knowledge Centre B.V.
Most cited
By later US patents
- Powder coating composition employing mixture of polyepoxide resin with modified polyester resin65US 4,147,737 AInternationale Octrooi Maatschappij "Octropa" B.V. · 1979
- Hydroxy-functional polyesters as thermoplastic barrier resins59US 5,171,820 AThe Dow Chemical Company · 1992
- Hyperbranched macromolecule from epoxide nucleus and hydroxy-functional carboxylic acid chain extenders45US 5,663,247 APerstorp AB · 1997
- Polyesters43US 4,403,093 APPG Industries, Inc. · 1983
- Manufacturing of rigid foam using etherified modified aromatic polyols42US 4,604,410 AChardonol Corporation · 1986