A61K 31/409
Having four such rings
Official title: having four such rings, e.g. porphine derivatives, bilirubin, biliverdine (hemin, hematin A61K31/555)
A61K31/409 (Having four such rings) appears on 290 US grants and 526 published applications in this corpus.
Search patents in A61K- Granted patents
- 290
- Published applications
- 526
- Assignees
- 318
- Inventors
- 1,166
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 11 | 0 |
| 1999 | 7 | 0 |
| 2000 | 7 | 0 |
| 2001 | 2 | 4 |
| 2002 | 2 | 10 |
| 2003 | 11 | 19 |
| 2004 | 5 | 24 |
| 2005 | 6 | 22 |
| 2006 | 7 | 19 |
| 2007 | 3 | 23 |
| 2008 | 2 | 24 |
| 2009 | 3 | 15 |
| 2010 | 9 | 20 |
| 2011 | 7 | 19 |
| 2012 | 11 | 20 |
| 2013 | 11 | 15 |
| 2014 | 12 | 24 |
| 2015 | 12 | 21 |
| 2016 | 16 | 18 |
| 2017 | 17 | 26 |
| 2018 | 14 | 21 |
| 2019 | 11 | 21 |
| 2020 | 17 | 23 |
| 2021 | 14 | 28 |
| 2022 | 22 | 34 |
| 2023 | 13 | 24 |
| 2024 | 15 | 23 |
| 2025 | 9 | 18 |
| 2026 | 5 | 11 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Compositions and methods for administering a YAP1/WWRT1 inhibiting composition and a GLS1 inhibiting composition16 Jun 2026US 12,653,785 B2University of Pittsburgh—Of the Commonwealth System of Higher Education
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- Platinum-based drug-/photosensitizer-loaded protein nanoparticle, and preparation method therefor and application thereof7 Apr 2026US 12,594,335 B2Soochow University
- Cosmetic containing ultraviolet wavelength converting substance and medicinal agent17 Feb 2026US 12,551,418 B2Shiseido Company, Ltd.
- Oil-in-water type emulsification composition containing UV wavelength conversion substance17 Feb 2026US 12,551,424 B2Shiseido Company, Ltd.
- Compositions and methods for treating cancer by targeting bach18 Oct 2026US 2026/0306455 A1
- Pyropheophorbide Analogues for Therapy and Diagnosis27 Aug 2026US 2026/0248828 A1RMW CHO Group Limited
- Combination therapy methods, compositions and kits13 Aug 2026US 2026/0232752 A1Accure Therapeutics, S.L.
- Devices for reducing implant associated infections2 Jul 2026US 2026/0183454 A1Znable LLC
- Method for preparing medicines, having reduced production time and improved stability11 Jun 2026US 2026/0157967 A1Dr.Inb Co.
Most cited
By later US patents
- Use of green porphyrins to treat neovasculature in the eye116US 5,798,349 AMassachuesetts Eye & Ear Infirmary · 1998
- Derivatives of fluorene, anthracene, xanthene, dibenzosuberone and acridine and uses thereof91US 8,129,519 B22012
- Method and apparatus for determining acetabular component positioning88US 8,267,938 B22012
- Use of green porphyrins to treat neovasculature in the eye75US 6,225,303 B1Massachusetts Eye and Ear Infirmary · 2001
- Tetrapyrrole polyaminomonocarboxylic acid therapeutic agents65US 4,977,177 ANippon Petrochemicals Company, Limited · 1990