A61K 31/5578
Having a pentalene ring system
Official title: having a pentalene ring system, e.g. carbacyclin, iloprost
A61K31/5578 (Having a pentalene ring system) appears on 52 US grants and 96 published applications in this corpus.
Search patents in A61K- Granted patents
- 52
- Published applications
- 96
- Assignees
- 57
- Inventors
- 166
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 1 |
| 2002 | 2 | 1 |
| 2003 | 0 | 2 |
| 2004 | 0 | 1 |
| 2005 | 1 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 5 |
| 2010 | 0 | 0 |
| 2011 | 2 | 6 |
| 2012 | 1 | 3 |
| 2013 | 3 | 7 |
| 2014 | 2 | 6 |
| 2015 | 4 | 8 |
| 2016 | 3 | 5 |
| 2017 | 4 | 6 |
| 2018 | 2 | 5 |
| 2019 | 2 | 6 |
| 2020 | 2 | 4 |
| 2021 | 3 | 2 |
| 2022 | 0 | 3 |
| 2023 | 1 | 6 |
| 2024 | 2 | 5 |
| 2025 | 5 | 5 |
| 2026 | 2 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compositions for the treatment of glaucoma and ocular hypertension8 Sep 2026US 12,728,131 B2Nicox S A.
- Compositions containing rapid-acting insulin analogues12 May 2026US 12,622,949 B2Case Western Reserve University
- Methods and compositions for treating chronic obstructive pulmonary disease, asthma, pneumonia, bronchitis, cystic fibrosis, pulmonary edema, interstitial lung disease, sarcoidosis, idiopathic pulmonary fibrosis, acute respiratory distress syndrome, and pulmonary arterial hypertension14 Oct 2025US 12,440,488 B2ReversPAH LLC
- Method of using iloprost for treating frostbite9 Sep 2025US 12,409,183 B2BTG International Limited
- Iloprost compositions and formulations thereof9 Sep 2025US 12,409,184 B2BTG International Limited
- Compositions containing rapid-acting insulin analogues30 Jul 2026US 2026/0216298 A1Case Western Reserve University
- Treprostinil formulations and their uses18 Jun 2026US 2026/0166056 A1United Therapeutics Corporation
- Nebulizer kits and uses thereof12 Mar 2026US 2026/0069535 A1
- Prostanoid receptor agonists as non-tuberculous anti-mycobacterial agents22 Jan 2026US 2026/0021109 A1
- Method of treating pah with combinations of ralinepag and other agents15 Jan 2026US 2026/0014114 A1Arena Pharmaceuticals, Inc.
Most cited
By later US patents
- Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension118US 5,296,504 AKabi Pharmacia AB · 1994
- Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension118US 5,422,368 AKabi Pharmacia AB · 1995
- Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension69US 5,321,128 AKabi Pharmacia AB · 1994
- Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension53US 6,030,999 APharmacia & Upjohn Aktiebolag · 2000
- Prostaglandin derivatives for the treatment of glaucoma or ocular hypertension44US 5,578,618 APharmacia Aktiebolag · 1996