A61K 31/21
Esters
Official title: Esters, e.g. nitroglycerine, selenocyanates
A61K31/21 (Esters) appears on 9,056 US grants and 14,440 published applications in this corpus.
Search patents in A61K- Granted patents
- 9,056
- Published applications
- 14,440
- Assignees
- 5,198
- Inventors
- 23,015
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 32 | 0 |
| 1977 | 39 | 0 |
| 1978 | 43 | 0 |
| 1979 | 30 | 0 |
| 1980 | 56 | 0 |
| 1981 | 24 | 0 |
| 1982 | 25 | 0 |
| 1983 | 23 | 0 |
| 1984 | 35 | 0 |
| 1985 | 31 | 0 |
| 1986 | 38 | 0 |
| 1987 | 55 | 0 |
| 1988 | 42 | 0 |
| 1989 | 62 | 0 |
| 1990 | 64 | 0 |
| 1991 | 67 | 0 |
| 1992 | 43 | 0 |
| 1993 | 74 | 0 |
| 1994 | 62 | 0 |
| 1995 | 82 | 0 |
| 1996 | 113 | 0 |
| 1997 | 161 | 0 |
| 1998 | 160 | 0 |
| 1999 | 184 | 0 |
| 2000 | 187 | 0 |
| 2001 | 166 | 75 |
| 2002 | 196 | 288 |
| 2003 | 175 | 401 |
| 2004 | 128 | 422 |
| 2005 | 136 | 421 |
| 2006 | 176 | 477 |
| 2007 | 84 | 395 |
| 2008 | 99 | 376 |
| 2009 | 101 | 385 |
| 2010 | 152 | 505 |
| 2011 | 149 | 454 |
| 2012 | 231 | 485 |
| 2013 | 304 | 658 |
| 2014 | 352 | 764 |
| 2015 | 403 | 751 |
| 2016 | 475 | 815 |
| 2017 | 478 | 703 |
| 2018 | 488 | 684 |
| 2019 | 468 | 765 |
| 2020 | 461 | 709 |
| 2021 | 429 | 829 |
| 2022 | 397 | 743 |
| 2023 | 358 | 669 |
| 2024 | 330 | 670 |
| 2025 | 375 | 542 |
| 2026 | 213 | 454 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and compositions for treating fungal infections6 Oct 2026US 12,751,944 B2Neoculi Pty Ltd
- Therapeutic methods and compositions for treating movement disorders29 Sep 2026US 12,746,231 B2Vima Therapeutics, Inc.
- Crystalline 4-((L-valyl)oxy)butanoic acid29 Sep 2026US 12,747,199 B2Xwpharma Ltd.
- Methods for the treatment of infantile spasms using medium chain triglycerides22 Sep 2026US 12,740,959 B2Cerecin Australia Pty Limited
- Treatment of herpes zoster with topical tetracaine22 Sep 2026US 12,740,960 B2Pagari Life Science Corp
- Treprostinil prodrugs8 Oct 2026US 2026/0306438 A1United Therapeutics Corporation
- Sulfurized imidazoles in ophthalmic formulations8 Oct 2026US 2026/0306457 A1Geneiii Biotech Company Ltd.
- Inhaled statins as bronchodilators to improve lung function in respiratory diseases8 Oct 2026US 2026/0306477 A1Beth Israel Deaconess Medical Center, Inc.
- Identification of mechanosensing regulators in plasmacytoid dendritic cells8 Oct 2026US 2026/0306507 A1New York Society for the Relief of Theruptured and Crippled, Maintaining the Hospital Special --
- Composition, methods and uses8 Oct 2026US 2026/0306509 A14E Therapeutics, Inc.
Most cited
By later US patents
- Treatment of damaged bone marrow and dosage units therefor585US 4,938,949 AUniversity of New York · 1990
- Method of potentiating an immune response425US 5,075,109 ASouthern Research Institute · 1991
- Compositions and methods for topical administration of pharmaceutically active agents369US 5,719,197 ANoven Pharmaceuticals, Inc. · 1998
- Lipid formulation340US 8,158,601 B2Alnylam Pharmaceuticals, Inc. · 2012
- Compositions and methods for topical administration of pharmaceutically active agents324US 5,446,070 ANover Pharmaceuticals, Inc. · 1995