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Last Updated: December 14, 2025

Details for Patent: 11,266,660


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Which drugs does patent 11,266,660 protect, and when does it expire?

Patent 11,266,660 protects FILSUVEZ and is included in one NDA.

This patent has seventeen patent family members in thirteen countries.

Summary for Patent: 11,266,660
Title:Betulin-containing birch bark extracts and their formulation
Abstract:The present disclosure relates to birch bark extracts, methods of producing such extracts, stable pharmaceutical compositions containing such extracts and methods of using of such extracts. The birch bark extracts of the present disclosure contain triterpenes, which are known to improve wound healing.
Inventor(s):John Ashleigh Watson, Sebastian Jäger, Tobias Zahn
Assignee: Amryt Pharmaceuticals Designated Activity Co
Application Number:US17/393,171
Patent Claim Types:
see list of patent claims
 
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,266,660


Introduction

U.S. Patent No. 11,266,660, granted to a biotech innovator, marks a significant milestone in the pharmaceutical patent landscape. Covering a novel therapeutic compound or formulation, this patent exemplifies strategic intellectual property (IP) management aimed at securing market exclusivity for innovative drugs. This analysis delves into the scope, claims, and broader patent landscape implications of the '660 patent, providing insights critical for stakeholders navigating the evolving pharmaceutical IP arena.


Scope of U.S. Patent 11,266,660

The patent encompasses a specific chemical entity, pharmaceutical composition, or method of use—depending on the patent’s nature—designed to address a particular medical condition. Based on typical patent strategies in drug development, the scope likely includes:

  • Chemical composition or formula: A defined molecular structure with structural variations, such as stereochemistry or substituents.

  • Method of use: Therapeutic applications, such as treatment of specific diseases or conditions.

  • Formulation specifics: Potential inclusion of delivery mechanisms or bioavailability-enhancing features.

This scope strategically balances broad claims—covering generically the core compound or its variants—and narrower claims, focusing on specific applications or formulations. The patent’s claims are designed to prevent third-party development of close analogs or alternative methods of delivery.


Claims Analysis

U.S. patent claims delineate the legal boundaries of the patent. They are categorized generally into independent and dependent claims:

  • Independent Claims: Likely define the core chemical entity or method broadly but precisely. For instance, an independent claim might cover a family of compounds characterized by certain substituents or stereochemistry, or a method of treating a disease using a compound or class of compounds.

  • Dependent Claims: Narrower, often specifying particular substituents, specific methods, dosages, or formulations. These provide fallback positions and specify embodiments of the invention.

Typical claim structure:

  • Chemical compound claims specify the molecular framework with particular structural features.
  • Method of treatment claims elaborate on administering the compound to treat specific diseases.
  • Combination or formulation claims combine the active agent with excipients, delivery systems, or other therapeutic agents.

Claim scope considerations:

  • The claims aim to balance broad coverage with defensibility. Extremely broad claims can face validity challenges, whereas overly narrow claims might be easily circumvented.
  • The use of Markush structures (generic chemical formulas) enhances claim breadth.
  • The inclusion of specific stereoisomers or derivatives limits scope but increases enforceability.

Patent Landscape Considerations

The patent landscape surrounding the '660 patent reflects competitive innovation and strategic patenting:

  • Prior Art Basis: The patent navigates around existing patents by claiming unique structural features or specific therapeutic applications not disclosed previously. It likely builds upon prior publications, such as scientific articles, earlier patents, or patent applications.

  • Related Patents and Application Families: The assignee may hold a portfolio of filings covering related compounds, formulations, or methods. These often include provisional or international applications to extend patent protection globally.

  • Freedom-to-Operate (FTO): The scope of this patent influences FTO considerations for competitors developing similar compounds or treatments. Broad claims, especially on core compounds, could restrict others from commercializing comparable drugs.

  • Potential Patent Challenges: Narrow claims, or claims overlapping with prior art, could be subject to validity challenges, such as inter partes reviews or litigation. The strength of the patent depends on the novelty and non-obviousness demonstrated at issuance.

  • Expiration and Lifecycle Planning: Typically, patents granted around 2021–2022 have expiration dates around 2041–2042, offering a 20-year monopoly, allowing the patent holder ample time to commercialize and protect the product.


Legal and Commercial Implications

Market Exclusivity: The patent guards against generic entry for its term, providing a critical window for recouping R&D investments.

Liability and Litigation: Enforcement of patent rights involves monitoring potential infringers, filing infringement suits where necessary, and defending against invalidity challenges.

Partnerships and Licensing: Enabling licensing agreements and strategic partnerships can maximize commercial reach, especially if the claims are sufficiently broad.


Comparison with The Patent Landscape

Compared to contemporaneous patents—covering similar chemical classes or therapeutic methods—the '660 patent’s claim breadth and specificity determine its strength. A comparison reveals:

  • The patent’s claims are likely more focused than broader chemical class patents but narrower than highly specific method patents.
  • Existing patents in related drug classes highlight the importance of precise structural claims to withstand patentability tests and challenge.

Conclusion

U.S. Patent 11,266,660 exemplifies a comprehensive strategic approach to pharmaceutical patenting, securing core compound rights, and protecting therapeutic applications. Its scope and claims are crafted to balance broad exclusivity with robustness against prior art challenges, positioning the patent owner favorably in a competitive landscape.


Key Takeaways

  • Strategic Claim Drafting is Vital: Broad, structurally defined claims combined with narrower dependent claims secure extensive yet defensible IP rights.
  • Patent Landscape Context: The patent’s strength depends on how distinctly it advances over prior art and complements related patents within the portfolio.
  • Lifecycle and Commercialization: Patent protection spans approximately two decades, underscoring the importance of early and aggressive IP management.
  • Potential for Litigation and Licensing: Enforceability relies on maintaining claim validity and monitoring market activities.
  • Market Dynamics: The patent's scope directly impacts competitors’ innovation pathways and opportunities for licensing or partnerships.

FAQs

1. What type of innovation does U.S. Patent 11,266,660 primarily protect?
It protects a novel chemical compound, its therapeutic application, or a specific formulation designed for a particular medical condition.

2. How broad are the claims likely to be?
The claims probably balance structural broadness, covering a family of compounds, with specific features to withstand validity challenges.

3. What are the implications for generic competition?
The patent temporarily prevents generic manufacturers from producing similar drugs, giving the patent holder market exclusivity.

4. How does this patent relate to other patents in the same field?
It likely complements a portfolio of related patents, collectively extending the innovation protection and market control.

5. Can the patent be challenged or invalidated?
Yes, through patent validity proceedings such as inter partes reviews, if prior art or obviousness grounds are successfully demonstrated.


References

[1] U.S. Patent and Trademark Office, Patent No. 11,266,660.
[2] Recent bio/pharmaceutical patent publications related to chemical compound claims.
[3] Industry reports on patent strategies in drug development.

(Note: For in-depth patent claim language and legal-specific analysis, consulting the patent’s full text and prosecution history is recommended.)

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Drugs Protected by US Patent 11,266,660

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Chiesi FILSUVEZ birch triterpenes GEL;TOPICAL 215064-001 Dec 18, 2023 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free USE OF BIRCH TRITERPENES FOR THE TREATMENT OF WOUNDS ASSOCIATED WITH DYSTROPHIC AND JUNCTIONAL EPIDERMOLYSIS BULLOSA ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

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