C08G 64/34
And cyclic ethers
Official title: and cyclic ethers
C08G64/34 (And cyclic ethers) appears on 266 US grants and 340 published applications in this corpus.
Search patents in C08G- Granted patents
- 266
- Published applications
- 340
- Assignees
- 91
- Inventors
- 559
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 2 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 4 |
| 2004 | 3 | 5 |
| 2005 | 2 | 1 |
| 2006 | 3 | 5 |
| 2007 | 2 | 0 |
| 2008 | 1 | 1 |
| 2009 | 2 | 4 |
| 2010 | 3 | 8 |
| 2011 | 0 | 15 |
| 2012 | 8 | 15 |
| 2013 | 10 | 22 |
| 2014 | 12 | 27 |
| 2015 | 21 | 25 |
| 2016 | 28 | 27 |
| 2017 | 20 | 22 |
| 2018 | 23 | 28 |
| 2019 | 23 | 27 |
| 2020 | 25 | 20 |
| 2021 | 13 | 22 |
| 2022 | 9 | 18 |
| 2023 | 7 | 13 |
| 2024 | 10 | 8 |
| 2025 | 7 | 12 |
| 2026 | 5 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for preparing polypropylene carbonate30 Jun 2026US 12,668,661 B2ENI S. p. A.
- Non-metal catalyst for synthesizing polycarbonate by CO2 and preparation method therefor31 Mar 2026US 12,589,384 B2Wuhan Institute of Technology
- Carbon reduction type thermoplastic polyurethane elastomer composition and method for preparing same17 Mar 2026US 12,577,396 B2Hyundai Motor Company
- Polyurethane adhesive composition and method for preparing same10 Feb 2026US 12,545,824 B2Hyundai Motor Company
- Composition and methods20 Jan 2026US 12,528,911 B2
- Surface-active agent1 Oct 2026US 2026/0297250 A1Econic Technologies Ltd.
- Double metal cyanide catalyst and method for preparing same20 Aug 2026US 2026/0241373 A1Gs Caltex Corporation
- Polyalkylene carbonate resin composition and method for preparing the same6 Aug 2026US 2026/0226231 A1LG Chem.Ltd.
- Preparation method of double metal cyanide catalyst for preparing a polycarbonate-ether23 Jul 2026US 2026/0208170 A1
- Polyalkylenecarbonate resin composition and method for preparing the same14 May 2026US 2026/0132251 A1LG Chem.Ltd.
Most cited
By later US patents
- Polycarbonates made using high activity catalysts80US 6,133,402 ACornell Research Foundation, Inc. · 2000
- Polycarbonate polyol compositions and methods78US 8,247,520 B2Novomer, Inc. · 2012
- Process for producing polyalkylene carbonates76US 6,617,467 B1BASF SE · 2003
- Carbon dioxide oxirane copolymers prepared using double metal cyanide complexes64US 4,500,704 AThe Dow Chemical Company · 1985
- Polycarbonate polyol compositions and methods59US 8,470,956 B2Novomer, Inc. · 2013