A61K 31/52
Purines
Official title: Purines, e.g. adenine
A61K31/52 (Purines) appears on 3,418 US grants and 6,237 published applications in this corpus.
Search patents in A61K- Granted patents
- 3,418
- Published applications
- 6,237
- Assignees
- 2,505
- Inventors
- 11,110
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 2 | 0 |
| 1979 | 5 | 0 |
| 1980 | 4 | 0 |
| 1981 | 10 | 0 |
| 1982 | 7 | 0 |
| 1983 | 8 | 0 |
| 1984 | 9 | 0 |
| 1985 | 12 | 0 |
| 1986 | 10 | 0 |
| 1987 | 11 | 0 |
| 1988 | 16 | 0 |
| 1989 | 22 | 0 |
| 1990 | 19 | 0 |
| 1991 | 10 | 0 |
| 1992 | 24 | 0 |
| 1993 | 21 | 0 |
| 1994 | 15 | 0 |
| 1995 | 27 | 0 |
| 1996 | 33 | 0 |
| 1997 | 54 | 0 |
| 1998 | 55 | 0 |
| 1999 | 67 | 0 |
| 2000 | 73 | 0 |
| 2001 | 85 | 26 |
| 2002 | 77 | 96 |
| 2003 | 66 | 149 |
| 2004 | 39 | 148 |
| 2005 | 43 | 190 |
| 2006 | 55 | 195 |
| 2007 | 32 | 199 |
| 2008 | 37 | 166 |
| 2009 | 54 | 160 |
| 2010 | 80 | 171 |
| 2011 | 73 | 206 |
| 2012 | 97 | 220 |
| 2013 | 110 | 234 |
| 2014 | 144 | 318 |
| 2015 | 180 | 308 |
| 2016 | 147 | 325 |
| 2017 | 179 | 320 |
| 2018 | 170 | 284 |
| 2019 | 196 | 338 |
| 2020 | 168 | 304 |
| 2021 | 162 | 357 |
| 2022 | 164 | 342 |
| 2023 | 131 | 318 |
| 2024 | 154 | 327 |
| 2025 | 148 | 280 |
| 2026 | 101 | 256 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods of treating fibrotic liver diseases or conditions with indeglitazar29 Sep 2026US 12,746,225 B2Pleiogenix Inc.
- Methods of treating Prader Willi Syndrome and conditions associated with low basal metabolic rate or hyperphagia using a KATP channel opener29 Sep 2026US 12,746,244 B2Sedogen LLC
- Methods and compositions for delivery of agents across the blood-brain barrier29 Sep 2026US 12,747,269 B2The Brigham and Women S Hospital, Inc.
- Histone deacetylase inhibitors for use in immunotherapy22 Sep 2026US 12,740,986 B2Viracta Subsidiary, Inc.
- Treatment of immunosuppressed subjects15 Sep 2026US 12,734,216 B2NantCell, Inc.
- Tea compositions comprising paraxanthine and methods of production thereof8 Oct 2026US 2026/0305643 A1
- Methods of preventing post-traumatic osteoarthritis using metformin8 Oct 2026US 2026/0306428 A1
- Composition for removing and inhibiting senescent cells, and uses thereof8 Oct 2026US 2026/0306460 A1Lifeceutix Co., Ltd.
- Inhaled statins as bronchodilators to improve lung function in respiratory diseases8 Oct 2026US 2026/0306477 A1Beth Israel Deaconess Medical Center, Inc.
- Paraxanthine-based bioactive composition and method of use thereof8 Oct 2026US 2026/0306499 A1Px Ing, LLC
Most cited
By later US patents
- Wound dressing with conformable elastomeric wound contact layer1,263US 5,445,604 ASmith and Nephew Associated Companies Limited · 1995
- Reversal of general anesthesia by administration of methylphenidate, amphetamine, modafinil, amantadine, and/or caffeine486US 10,299,720 B2The General Hospital Corporation · 2019
- 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