D21H 19/52
Cellulose
Official title: Cellulose; Derivatives thereof
D21H19/52 (Cellulose) appears on 131 US grants and 194 published applications in this corpus.
Search patents in D21H- Granted patents
- 131
- Published applications
- 194
- Assignees
- 127
- Inventors
- 453
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 3 |
| 2004 | 2 | 2 |
| 2005 | 1 | 2 |
| 2006 | 2 | 3 |
| 2007 | 1 | 1 |
| 2008 | 1 | 4 |
| 2009 | 0 | 1 |
| 2010 | 1 | 5 |
| 2011 | 2 | 1 |
| 2012 | 1 | 3 |
| 2013 | 2 | 4 |
| 2014 | 1 | 6 |
| 2015 | 2 | 9 |
| 2016 | 3 | 4 |
| 2017 | 1 | 8 |
| 2018 | 5 | 7 |
| 2019 | 7 | 12 |
| 2020 | 13 | 18 |
| 2021 | 9 | 13 |
| 2022 | 12 | 19 |
| 2023 | 8 | 16 |
| 2024 | 10 | 21 |
| 2025 | 8 | 18 |
| 2026 | 7 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Gas barrier film for packaging material25 Aug 2026US 12,715,668 B2Stora Enso OYJ
- Aqueous ethyl cellulose dispersion21 Jul 2026US 12,686,973 B2Kemira Oyj
- Cellulosic structures for high barrier applications19 May 2026US 12,630,979 B2WestRock MWV, LLC
- Method for manufacturing a barrier film comprising highly refined cellulose12 May 2026US 12,624,501 B2Stora Enso OYJ
- Composition for providing barrier properties, its use and a sheet-like product28 Apr 2026US 12,612,734 B2Kemira Oyj
- Polymer coated paper and paperboard27 Aug 2026US 2026/0250054 A1Stora Enso OYJ
- Process for producing a fibrous material27 Aug 2026US 2026/0250912 A1Stora Enso OYJ
- Method and plant for making a cellulose-based web20 Aug 2026US 2026/0243025 A1Comas - Costruzioni Macchine Speciali - S.P.A.
- Barrier film for packaging material6 Aug 2026US 2026/0225358 A1Stora Enso OYJ
- Water-Proof and Oil-Proof Coating, Preparation Method and Use Thereof6 Aug 2026US 2026/0225780 A1South China University of Technology
Most cited
By later US patents
- Method and apparatus for applying a material to a web113US 5,997,691 APhilip Morris Incorporated · 1999
- Fluid suspensions of polysaccharide mixtures35US 5,080,717 AAqualon Company · 1992
- Dispersible water soluble polymers32US 6,197,100 B1Hercules Incorporated · 2001
- Paper coatings containing guar or reduced molecular weight guar28US 5,725,648 AHercules Incorporated · 1998
- Paper coating composition with improved optical brightener carriers28US 6,030,443 AHercules Incorporated · 2000