C08J 2329/04
Polyvinyl alcohol
Official title: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
C08J2329/04 (Polyvinyl alcohol) appears on 686 US grants and 930 published applications in this corpus.
Search patents in C08J- Granted patents
- 686
- Published applications
- 930
- Assignees
- 456
- Inventors
- 2,024
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 8 | 0 |
| 1986 | 3 | 0 |
| 1987 | 6 | 0 |
| 1988 | 4 | 0 |
| 1989 | 11 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 11 | 0 |
| 1993 | 7 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 3 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 8 | 5 |
| 2002 | 5 | 10 |
| 2003 | 6 | 11 |
| 2004 | 7 | 12 |
| 2005 | 4 | 14 |
| 2006 | 8 | 20 |
| 2007 | 4 | 21 |
| 2008 | 6 | 22 |
| 2009 | 9 | 28 |
| 2010 | 14 | 17 |
| 2011 | 9 | 20 |
| 2012 | 10 | 19 |
| 2013 | 14 | 10 |
| 2014 | 24 | 26 |
| 2015 | 17 | 39 |
| 2016 | 26 | 41 |
| 2017 | 24 | 50 |
| 2018 | 27 | 49 |
| 2019 | 42 | 48 |
| 2020 | 43 | 53 |
| 2021 | 31 | 71 |
| 2022 | 32 | 83 |
| 2023 | 39 | 74 |
| 2024 | 62 | 78 |
| 2025 | 63 | 57 |
| 2026 | 36 | 52 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- EVOH extractant, EVOH extraction method using the same, EVOH recovery method, and EVOH extractant regeneration method6 Oct 2026US 12,753,289 B2Kyoeisha Chemical Co., Ltd.
- Method of producing gas barrier laminate, gas barrier laminate, packaging film, packaging container, and packaging product25 Aug 2026US 12,715,019 B2Toppan Holdings Inc.
- Water-soluble film and packaging25 Aug 2026US 12,715,966 B2Kuraray Co., Ltd.
- Water-soluble film and package18 Aug 2026US 12,709,449 B2Kuraray Co., Ltd.
- Hierarchically structured hydrogel with tunable mechanical properties18 Aug 2026US 12,709,665 B2The Regents of the University of California
- Stock roll for protective film transfer, protective film arranging method, and chip manufacturing method1 Oct 2026US 2026/0305212 A1Disco Corporation
- Processing aid, and method for obtaining a processing aid24 Sep 2026US 2026/0286070 A1Devinochem GmbH & Co. KG
- Method of forming a composition and the composition formed therefrom17 Sep 2026US 2026/0279766 A1Teebs R&D, LLC
- High-strength agricultural foam10 Sep 2026US 2026/0265479 A1Brekland Incorporated
- Flame-retardant metal-resin composite material3 Sep 2026US 2026/0258204 A1Mitsubishi Chemical Infratec Co., Ltd.
Most cited
By later US patents
- Porous and transparent poly(vinyl alcohol) gel and method of manufacturing the same433US 4,663,358 ABiomaterials Universe, Inc. · 1987
- Anisotropic hydrogels323US 8,465,771 B2The University of Western Ontario · 2013
- Ultrasonic coupler245US 5,575,291 AFujitsu Limited · 1996
- PVA hydrogel202US 7,235,592 B2Zimmer, Inc. · 2007
- Process for preparing a hydrogel123US 4,664,857 ANippon Oil Co., Ltd. · 1987