C08G 65/4081
Forming cyclic polymers or oligomers
Official title: {forming cyclic polymers or oligomers}
C08G65/4081 (Forming cyclic polymers or oligomers) appears on 30 US grants and 15 published applications in this corpus.
Search patents in C08G- Granted patents
- 30
- Published applications
- 15
- Assignees
- 17
- Inventors
- 81
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 5 | 0 |
| 1990 | 3 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 1 |
| 2014 | 1 | 0 |
| 2015 | 1 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 3 |
| 2020 | 1 | 2 |
| 2021 | 1 | 0 |
| 2022 | 1 | 3 |
| 2023 | 0 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polyphenylene ether melt extrusion formed body and method for producing polyphenylene ether melt extrusion formed body31 Mar 2026US 12,590,182 B2TOYOBO MC Corporation
- Material for forming organic film, patterning process, and polymer5 Aug 2025US 12,379,663 B2Shin-Etsu Chemical Co., Ltd.
- Polymer, composition, molded article, cured product and laminate23 Jul 2024US 12,043,702 B2Jsr Corporation
- Polymer, composition, molded article, cured product and laminate22 Nov 2022US 11,505,651 B2Jsr Corporation
- Continuous production method and continuous production apparatus for aromatic cyclic oligomer, and production method for aromatic polymer21 Dec 2021US 11,203,666 B2Kureha Corporation
- Oligomer, method for preparing oligomer, and method for preparing cured product of oligomer23 Jul 2026US 2026/0209435 A1CPC Corporation, Taiwan
- Food or beverage contact articles coated with resins derived from reactions of phenols with polyolefinic terpenes17 Aug 2023US 2023/0257625 A1Swimc LLC
- Polyphenylene ether melt extrusion formed body and method for producing polyphenylene ether melt extrusion formed body1 Dec 2022US 2022/0380535 A1Toyobo Co., Ltd.
- Polymer, composition, molded article, cured product and laminate28 Jul 2022US 2022/0235179 A1Jsr Corporation
- Material for forming organic film, patterning process, and polymer7 Jul 2022US 2022/0214618 A1Shin-Etsu Chemical Co., Ltd.
Most cited
By later US patents
- Cyclic polyester oligomer polymerization58US 4,757,132 AGeneral Electric Company · 1988
- Macrocyclic oligomers containing spiro(bis)indane moietes39US 4,980,453 AGeneral Electric Company · 1990
- Cyclic polyester oligomer and method for their preparation37US 4,829,144 AGeneral Electric Company · 1989
- Nanoporous polymers comprising macrocycles19US 6,380,347 B1Honeywell International Inc. · 2002
- Method for making polyformals and polyformal products made thereby12US 4,374,974 AGeneral Electric Company · 1983