A61K 9/2866
Cellulose
Official title: {Cellulose; Cellulose derivatives, e.g. hydroxypropyl methylcellulose}
A61K9/2866 (Cellulose) appears on 1,568 US grants and 2,884 published applications in this corpus.
Search patents in A61K- Granted patents
- 1,568
- Published applications
- 2,884
- Assignees
- 944
- Inventors
- 4,415
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 2 | 0 |
| 1981 | 9 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 7 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 4 | 0 |
| 1989 | 9 | 0 |
| 1990 | 9 | 0 |
| 1991 | 11 | 0 |
| 1992 | 4 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 11 | 0 |
| 1996 | 14 | 0 |
| 1997 | 18 | 0 |
| 1998 | 23 | 0 |
| 1999 | 16 | 0 |
| 2000 | 38 | 0 |
| 2001 | 34 | 15 |
| 2002 | 24 | 45 |
| 2003 | 36 | 74 |
| 2004 | 29 | 104 |
| 2005 | 20 | 117 |
| 2006 | 21 | 90 |
| 2007 | 19 | 115 |
| 2008 | 15 | 131 |
| 2009 | 18 | 114 |
| 2010 | 50 | 138 |
| 2011 | 41 | 129 |
| 2012 | 50 | 104 |
| 2013 | 75 | 156 |
| 2014 | 89 | 151 |
| 2015 | 87 | 171 |
| 2016 | 89 | 152 |
| 2017 | 108 | 164 |
| 2018 | 83 | 116 |
| 2019 | 69 | 114 |
| 2020 | 73 | 109 |
| 2021 | 72 | 109 |
| 2022 | 68 | 117 |
| 2023 | 52 | 103 |
| 2024 | 48 | 90 |
| 2025 | 46 | 92 |
| 2026 | 28 | 64 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Delayed release compositions22 Sep 2026US 12,740,951 B2Amneal Complex Products Research LLC
- Losartan-containing micro tablet for pediatric applications15 Sep 2026US 12,734,131 B2Midas Pharma GmbH
- Extended release amphetamine tablets15 Sep 2026US 12,734,132 B2Tris Pharma, Inc.
- High opacity coatings and substrates coated therewith15 Sep 2026US 12,734,133 B2BPSI Holdings, Inc.
- Solid dispersion forms of rifaximin25 Aug 2026US 12,714,699 B2Salix Pharmaceuticals, Inc.
- Method and pharmaceutical composition for treating a sleep disorder8 Oct 2026US 2026/0306442 A1Overseas Pharmaceuticals, Ltd.
- Methods of treating erythropoietic protoporphyria or x-linked protoporphyria with bitopertin1 Oct 2026US 2026/0294899 A1Disc Medicine, Inc.
- Tablet comprising 6-((5-methyl-3-(6-methylpyridin-3-yl)isoxazol-4-yl)methoxy)- n-(tetrahydrapyran-4-yl)pyridazine-3-carboxamide1 Oct 2026US 2026/0294904 A1Hoffmann-La Roche Inc.
- Controlled Release Formulations of Highly Lipophilic Physiologically Active Substances17 Sep 2026US 2026/0272955 A1ADD Advanced Drug Delivery Technologies Ltd.
- Delayed timed release pharmaceutical composition, preparation method therefor, and use thereof10 Sep 2026US 2026/0263349 A1Shanghai Wd Pharmaceutical Co., Ltd
Most cited
By later US patents
- Swelling modulated polymeric drug delivery device706US 5,120,548 AMerck & Co., Inc. · 1992
- Controlled-release formulations coated with aqueous dispersions of ethylcellulose445US 5,472,712 AEuroceltique, S.A. · 1995
- Stabilized controlled release substrate having a coating derived from an aqueous dispersion of hydrophobic polymer438US 5,273,760 AEuroceltigue, S.A. · 1993
- Orally administrable opioid formulations having extended duration of effect437US 5,968,551 APurdue Pharma L. P. · 1999
- Tamper-resistant oral opioid agonist formulations343US 6,696,088 B2Euro-Celtique S. A. · 2004