C08L 33/20
Homopolymers or copolymers of acrylonitrile
Official title: Homopolymers or copolymers of acrylonitrile (C08L55/02 takes precedence)
C08L33/20 (Homopolymers or copolymers of acrylonitrile) appears on 375 US grants and 390 published applications in this corpus.
Search patents in C08L- Granted patents
- 375
- Published applications
- 390
- Assignees
- 247
- Inventors
- 1,170
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 14 | 0 |
| 1978 | 6 | 0 |
| 1979 | 8 | 0 |
| 1980 | 9 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 9 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 6 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 4 | 1 |
| 2002 | 5 | 1 |
| 2003 | 4 | 6 |
| 2004 | 4 | 7 |
| 2005 | 1 | 7 |
| 2006 | 4 | 18 |
| 2007 | 5 | 7 |
| 2008 | 4 | 7 |
| 2009 | 6 | 17 |
| 2010 | 4 | 28 |
| 2011 | 7 | 14 |
| 2012 | 14 | 15 |
| 2013 | 8 | 28 |
| 2014 | 15 | 21 |
| 2015 | 21 | 28 |
| 2016 | 16 | 14 |
| 2017 | 19 | 30 |
| 2018 | 15 | 23 |
| 2019 | 26 | 36 |
| 2020 | 25 | 21 |
| 2021 | 13 | 15 |
| 2022 | 10 | 12 |
| 2023 | 8 | 17 |
| 2024 | 12 | 8 |
| 2025 | 19 | 6 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Binder composition for non-aqueous secondary battery electrode, slurry composition for non-aqueous secondary battery electrode, electrode for non-aqueous secondary battery, and non-aqueous secondary battery15 Sep 2026US 12,738,501 B2Zeon Corporation
- Secondary particle composite Group IVA materials5 May 2026US 12,620,594 B1Kratos LLC
- Binder composition for secondary battery21 Apr 2026US 12,605,926 B2Grst Singapore Pte. Ltd.
- Composite board including core and capstock, and associated method21 Oct 2025US 12,448,507 B1The AZEK Group LLC
- Method for preparing sulfur-polyacrylonitrile (SPAN)30 Sep 2025US 12,428,506 B2GM Global Technology Operations LLC
- Curable resin composition30 Jul 2026US 2026/0217965 A1Threebond Co., Ltd.
- Binder composition for secondary battery23 Jul 2026US 2026/0208476 A1Grst Singapore Pte. Ltd.
- Thermoplastic resin composition, method of preparing the same, and molded article including the same18 Jun 2026US 2026/0167813 A1LG Chem.Ltd.
- Modacrylic fiber and flame-retardant fiber assembly including same18 Dec 2025US 2025/0382729 A1Kaneka Corporation
- Composite board including core and capstock, and associated method9 Oct 2025US 2025/0313690 A1The AZEK Group LLC
Most cited
By later US patents
- Stabilized polyester compositions suitable for outdoor applications98US 4,525,504 AEastman Kodak Company · 1985
- Polymer composition comprising polyacrylonitrile polymer and multi-block copolymer96US 4,379,874 A1983
- Ionogenic hydrophilic water-insoluble gels from partially hydrolyzed acrylonitrile polymers and copolymers, and a method of manufacturing same66US 4,107,121 ACeskoslovenska akademie ved · 1978
- Hydrogel and method of making62US 6,232,406 B1Replication Medical, Inc. · 2001
- Polymeric blends with zwitterionic groups47US 5,712,326 ABiocompatibles Limited · 1998