D21H 13/04
Cellulose ethers
D21H13/04 (Cellulose ethers) appears on 24 US grants and 30 published applications in this corpus.
Search patents in D21H- Granted patents
- 24
- Published applications
- 30
- Assignees
- 25
- Inventors
- 80
- Latest grant
- 21 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 1 | 0 |
| 2009 | 0 | 1 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 0 | 3 |
| 2015 | 1 | 0 |
| 2016 | 3 | 3 |
| 2017 | 3 | 3 |
| 2018 | 1 | 3 |
| 2019 | 3 | 1 |
| 2020 | 1 | 6 |
| 2021 | 2 | 2 |
| 2022 | 1 | 1 |
| 2023 | 1 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing modified cellulose fiber, and modified cellulose fiber21 Apr 2026US 12,606,952 B2Kao Corporation
- Method for manufacturing mask pack for adsorbing heavy metals, and mask pack manufactured thereby3 Oct 2023US 11,771,204 B2LG Chem.Ltd.
- Method for manufacturing intermediate product for conversion into microfibrillated cellulose25 Oct 2022US 11,479,915 B2Stora Enso OYJ
- High alpha and high intrinsic viscosity pulp production apparatuses, methods and systems12 Oct 2021US 11,142,589 B2Bracell Bahia Specialty Cellulose SA
- Water-dispersible paper3 Aug 2021US 11,078,625 B2Nippon Paper Papylia Co., Ltd.
- Methods for Preparing Self-Structured Cellulose Aerogel Materials from Hydrogel and Their Applications30 Apr 2026US 2026/0117037 A1
- Segment for a smoking article comprising a calendered fiber web24 Apr 2025US 2025/0127208 A1delfortgroup AG
- Polymer fibre having improved long-term dispersibility28 Nov 2024US 2024/0392497 A1Trevira GmbH
- Crosslinked kraft pulp compositions and method30 Nov 2023US 2023/0383467 A1International Paper Company
- Flavor containing sheet comprising modified cellulose and smoking article comprising the same22 Sep 2022US 2022/0295870 A1Kt&G Corporation
Most cited
By later US patents
- Water-dispersible sheet and cigarette using the same45US 5,849,153 AJapan Tobaco Inc. · 1998
- Antibacterial antifungal agent and fibrous material containing the same40US 5,888,526 AMitsubishi Paper Mills Limited · 1999
- Water-dispersible sheet for cigarettes and cigarette using the same35US 5,722,433 AJapan Tobacco Inc. · 1998
- Filter material for removing chlorine from cold water in preparing a human-consumable beverage25US 5,595,659 ALydall, Inc. · 1997
- Dissolvable thermal direct adhesive label and label assembly including the same12US 9,418,576 B2Avery Dennison Corporation · 2016