A61K 31/5575
Having a cyclopentane
Official title: having a cyclopentane, e.g. prostaglandin E2, prostaglandin F2-alpha
A61K31/5575 (Having a cyclopentane) appears on 881 US grants and 1,410 published applications in this corpus.
Search patents in A61K- Granted patents
- 881
- Published applications
- 1,410
- Assignees
- 473
- Inventors
- 1,686
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 4 | 0 |
| 1994 | 4 | 0 |
| 1995 | 6 | 0 |
| 1996 | 15 | 0 |
| 1997 | 20 | 0 |
| 1998 | 18 | 0 |
| 1999 | 22 | 0 |
| 2000 | 22 | 0 |
| 2001 | 36 | 8 |
| 2002 | 34 | 40 |
| 2003 | 27 | 37 |
| 2004 | 16 | 37 |
| 2005 | 9 | 28 |
| 2006 | 8 | 25 |
| 2007 | 7 | 35 |
| 2008 | 8 | 27 |
| 2009 | 12 | 47 |
| 2010 | 18 | 38 |
| 2011 | 13 | 45 |
| 2012 | 26 | 58 |
| 2013 | 27 | 73 |
| 2014 | 59 | 107 |
| 2015 | 50 | 75 |
| 2016 | 47 | 85 |
| 2017 | 55 | 78 |
| 2018 | 44 | 58 |
| 2019 | 39 | 70 |
| 2020 | 44 | 71 |
| 2021 | 42 | 88 |
| 2022 | 36 | 70 |
| 2023 | 33 | 53 |
| 2024 | 28 | 69 |
| 2025 | 32 | 43 |
| 2026 | 16 | 45 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Use of high molecular weight hyaluronic acid as ocular transporting vehicle22 Sep 2026US 12,741,027 B2I. Com Medical GmbH
- Compositions for the treatment of glaucoma and ocular hypertension8 Sep 2026US 12,728,131 B2Nicox S A.
- Lyophilized preparation of prostaglandin E1 methyl ester for injection and production and use thereof18 Aug 2026US 12,708,604 B2Xi'an Hanfeng Pharmaceutical Co., Ltd.
- Methods and compositions for the treatment of hair loss4 Aug 2026US 12,697,334 B2Aneira Pharma, Inc.
- Rock inhibitors and uses thereof28 Jul 2026US 12,692,234 B2Alcon Inc.
- Combination therapy for pulmonary hypertension8 Oct 2026US 2026/0306461 A1Vivus, Inc.
- Misoprostol formulation for non-oral administration8 Oct 2026US 2026/0306508 A1Conceptra Biosciences, LLC
- Plasmin-induced internal limiting membrane digestion facilitates donor retinal ganglion cell transplantation8 Oct 2026US 2026/0306549 A1University of Pittsburgh—Of the Commonwealth System of Higher Education
- Ophthalmic solutions for canine, feline & equine glaucoma and oht1 Oct 2026US 2026/0294797 A1
- Rock inhibitors and uses thereof1 Oct 2026US 2026/0297033 A1Alcon Inc.
Most cited
By later US patents
- Means to achieve sustained release of synergistic drugs by conjugation378US 6,051,576 AUniversity of Kentucky Research Foundation · 2000
- Treatment of female sexual dysfunction239US 5,877,216 AVivus, Inc. · 1999
- Treatment of female sexual dysfunction233US 6,294,550 B1Asivi, LLC · 2001
- Cyclopentane heptanoic acid, 2-cycloalkyl or arylalkyl derivatives as therapeutic agents217US 5,688,819 AAllergan, Inc. · 1997
- Treatment of female sexual dysfunction212US 6,306,841 B1Asivi, LLC · 2001