C08L 29/04
Polyvinyl alcohol
Official title: Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
C08L29/04 (Polyvinyl alcohol) appears on 1,334 US grants and 1,514 published applications in this corpus.
Search patents in C08L- Granted patents
- 1,334
- Published applications
- 1,514
- Assignees
- 750
- Inventors
- 3,341
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 13 | 0 |
| 1977 | 4 | 0 |
| 1978 | 8 | 0 |
| 1979 | 8 | 0 |
| 1980 | 6 | 0 |
| 1981 | 11 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 6 | 0 |
| 1985 | 8 | 0 |
| 1986 | 10 | 0 |
| 1987 | 7 | 0 |
| 1988 | 10 | 0 |
| 1989 | 10 | 0 |
| 1990 | 10 | 0 |
| 1991 | 12 | 0 |
| 1992 | 22 | 0 |
| 1993 | 23 | 0 |
| 1994 | 34 | 0 |
| 1995 | 23 | 0 |
| 1996 | 30 | 0 |
| 1997 | 9 | 0 |
| 1998 | 17 | 0 |
| 1999 | 30 | 0 |
| 2000 | 13 | 0 |
| 2001 | 15 | 4 |
| 2002 | 25 | 27 |
| 2003 | 23 | 32 |
| 2004 | 20 | 36 |
| 2005 | 19 | 48 |
| 2006 | 17 | 34 |
| 2007 | 15 | 38 |
| 2008 | 8 | 39 |
| 2009 | 24 | 56 |
| 2010 | 34 | 53 |
| 2011 | 28 | 70 |
| 2012 | 32 | 40 |
| 2013 | 38 | 52 |
| 2014 | 39 | 53 |
| 2015 | 40 | 57 |
| 2016 | 41 | 53 |
| 2017 | 45 | 60 |
| 2018 | 44 | 104 |
| 2019 | 57 | 114 |
| 2020 | 75 | 105 |
| 2021 | 69 | 101 |
| 2022 | 75 | 80 |
| 2023 | 63 | 76 |
| 2024 | 62 | 69 |
| 2025 | 54 | 63 |
| 2026 | 39 | 50 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cellulose-based environmentally friendly plastic substitute material and preparation method thereof6 Oct 2026US 12,753,313 B2
- Ethylene-vinyl alcohol copolymer composition29 Sep 2026US 12,747,345 B2Mitsubishi Chemical Corporation
- Elastomeric matrices based on plasticized PVOH compositions and uses thereof22 Sep 2026US 12,740,939 B2aVISI Ltd.
- Gum olibanum nanofibers for drug release and wound healing applications8 Sep 2026US 12,728,180 B1King Saud University
- Water-soluble film and packaging25 Aug 2026US 12,715,966 B2Kuraray Co., Ltd.
- Processing aid, and method for obtaining a processing aid24 Sep 2026US 2026/0286070 A1Devinochem GmbH & Co. KG
- High-strength agricultural foam10 Sep 2026US 2026/0265479 A1Brekland Incorporated
- Rpvb in multilayer sports flooring10 Sep 2026US 2026/0265487 A1BeNewtral Srl - Società Benefit
- Porous Particles And Method For Preparing The Same3 Sep 2026US 2026/0258212 A1LG Chem.Ltd.
- Composition and liner for high pressure gas storage tank comprising thereof3 Sep 2026US 2026/0258239 A1Hanwha Solutions Corporation
Most cited
By later US patents
- Rigid annuloplasty device that becomes compliant after implantation421US 6,159,240 AMedtronic, Inc. · 2000
- Polymer compositions containing destructurized starch330US 5,095,054 AWarner-Lambert Company · 1992
- Anisotropic hydrogels323US 8,465,771 B2The University of Western Ontario · 2013
- Anti-angiogenic compositions and methods of use242US 6,544,544 B2Angiotech Pharmaceuticals, Inc. · 2003
- Wound-covering materials181US 4,524,064 ANippon Oil Co., Ltd. · 1985