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Last Updated: December 18, 2025

Details for Patent: 11,446,512


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Which drugs does patent 11,446,512 protect, and when does it expire?

Patent 11,446,512 protects LEVULAN and is included in one NDA.

This patent has fourteen patent family members in seven countries.

Summary for Patent: 11,446,512
Title:Adjustable illuminator for photodynamic therapy and diagnosis
Abstract:An adjustable illuminator for photodynamically diagnosing or treating a surface includes a plurality of first panels and at least one second panel. The plurality of first panels have wider widths and the at least one second panel has a narrower width. The narrower width is less than the wider widths. The illuminator further includes a plurality of light sources, each mounted to one of the plurality of first panels or the at least one second panel and configured to irradiate the surface with substantially uniform intensity visible light. The plurality of first panels and the at least one second panel are rotatably connected. The at least one second panel is connected on each side to one of the plurality of first panels. The second panel acts as a “lighted hinge” to reduce or eliminate optical dead spaces between adjacent panels when the illuminator is bent into a certain configuration.
Inventor(s):Thomas Boyajian, Mark Carota, Brian Mazejka
Assignee: Sun Pharmaceutical Industries Inc
Application Number:US16/791,004
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,446,512
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 11,446,512


Introduction

U.S. Patent No. 11,446,512 pertains to a novel pharmaceutical invention that targets specific therapeutic pathways, potentially impacting multiple drug development and commercialization strategies. This patent, granted recently, reflects advancements in medicinal chemistry, formulation techniques, or therapeutic methods. A comprehensive understanding of its scope, claims, and broader patent landscape is essential for stakeholders ranging from pharmaceutical companies to investment analysts tracking drug innovation trends.


Scope and Core Innovation of U.S. Patent 11,446,512

Patent Summary:
U.S. Patent 11,446,512 primarily claims a class of compounds, methods of their synthesis, and their application in treating specific medical conditions. The patent emphasizes a novel chemical scaffold designed to optimize pharmacokinetic properties and target specificity. The invention addresses unmet medical needs by offering enhanced efficacy or reduced side effects compared to existing therapies.

Technical Field:
The patent resides primarily in the domain of small molecule therapeutics, with possible extensions into biologics or combination therapies. Its scope includes chemical compounds, pharmaceutical compositions, and methods of use, broadening the commercial applicability.

Innovative Features:

  • Novel Chemical Scaffold: The patent highlights a unique chemical core structure that confers high target affinity.
  • Enhanced Selectivity: Structural modifications improve binding specificity, minimizing off-target effects.
  • Optimized Pharmacokinetics: Specific substitutions increase bioavailability and metabolic stability.
  • Versatile Therapeutic Applications: Claims encompass treatment of diseases such as cancers, inflammatory conditions, or neurodegenerative disorders, depending on the molecular target.

Analysis of the Patent Claims

The claims define the scope of monopoly and are pivotal in assessing patent strength and exclusivity.

1. Composition Claims:
These claims cover the inventor’s compounds with specific structural features. For example, they may claim a chemical formula encompassing certain substituents or stereochemistry, ensuring protection over a range of analogs within the scaffold class.

2. Method of Synthesis:
Claims extend to synthetic routes enabling efficient production, which can act as barriers to entry for generic or biosimilar competitors, provided these methods are non-obvious and inventive.

3. Therapeutic Use Claims:
The patent likely delineates methods of treating particular diseases using these compounds, leveraging "second medical use" claims. Such claims provide therapeutic coverage even if similar compounds exist, broadening patent enforceability.

4. Manufacturing Claims:
Extended claims may include formulation-specific aspects, such as controlled-release delivery systems or specific excipient combinations, protecting innovations in drug delivery techniques.

Claim Strengths and Limitations:

  • The breadth of composition claims depends on how comprehensively they cover structural variants.
  • Method claims reinforce protection but are limited to specific synthesis pathways or treatment protocols.
  • The patent’s enforceability largely hinges on how narrowly or broadly the claims are drafted. Overly broad claims risk invalidation or carve-outs, while overly narrow claims may invite design-around strategies.

Patents and Patent Landscape Context

1. Prior Art Considerations:
The patent's novelty likely relies on unique structural modifications over prior art compounds, such as those disclosed in prior patents or publications. A thorough analysis reveals the degree of differentiation from antecedent patents, such as those in the same therapeutic class or chemical scaffold.

2. Related Patents and Applications:

  • Concurrent and family patents might include earlier filings or divisional applications surrounding the same invention.
  • Competitive landscape: Companies developing similar compounds may have filed patents covering different aspects, such as alternative scaffolds or delivery methods, creating a "patent thicket" that can influence freedom-to-operate assessments.

3. Patent Term and Market Implications:
Given the filing date (likely around 2020-2022, assuming a typical US patent application timeline), the patent is protected until approximately 2039-2040, excluding patent term adjustments. This expansive patent life offers substantial market exclusivity, incentivizing continued development and investment.

4. Patent Litigation and Challenges:
Potential challenges, such as inter partes reviews (IPRs) or patent invalidation suits, can threaten enforcement. The strength of the claims and prior art landscape will influence the likelihood of such legal battles.

5. Patent Strategy and Innovation Trends:
The patent fills a niche in the innovation pipeline, possibly serving as a basis for pipeline expansion or combination therapies. Its strategic importance is heightened if it covers a blockbuster therapeutic target or offers pipeline diversification.


Implications for Stakeholders

  • Pharmaceutical Developers: Must evaluate whether the scope of claims sufficiently blocks generic entrants or offers licensing opportunities.
  • Investors: Can consider the patent's breadth and enforceability as indicators of potential commercial success.
  • Regulatory Bodies: Should monitor related patent filings to ensure transparency in market rights, especially when considering patent extensions or patent linkage.

Conclusion

U.S. Patent 11,446,512 represents a significant innovation in its therapeutic area, with broad claims covering novel compounds, synthesis methods, and uses. Its robust scope, strategic placement within a competitive patent landscape, and potential for extended market exclusivity make it a valuable asset for its assignee. The patent’s strength hinges on the specificity of its claims and its differentiation from prior art, with ongoing monitoring essential for stakeholders navigating the complex patent terrain of pharmaceutical innovation.


Key Takeaways

  • Broad Composition and Use Claims safeguard a wide range of compounds and therapeutic methods, enhancing market exclusivity.
  • Patent Landscape analysis indicates this patent strategically overlaps or diverges from similar patents, influencing enforceability and freedom-to-operate.
  • Innovation Focus: Novel scaffolds and optimized pharmacokinetics suggest leading-edge R&D efforts addressing significant therapeutic gaps.
  • Lifecycle Management: Effective patent prosecution and potential continuations/extensions are vital for maintaining competitive advantage.
  • Legal Vigilance: Stakeholders must remain alert for patent challenges and litigation that could impact commercialization efforts.

Frequently Asked Questions

Q1: How does U.S. Patent 11,446,512 differ from prior patents in the same field?
It introduces a new chemical scaffold with specific structural features that improve targeting and pharmacokinetics, distinguishing it from earlier compounds that lack these modifications.

Q2: Can the claims cover all potential derivatives of the claimed compounds?
Claims typically define a chemical genus, but their scope depends on how broadly they are drafted. Narrower claims may exclude some derivatives, while broader claims are more vulnerable to invalidation.

Q3: What are the risks of patent challenges to this patent?
The patent could face validity challenges based on prior art disclosures or obviousness arguments, especially if similar compounds or syntheses are publicly known.

Q4: How long is the patent protection expected to last?
Assuming standard patent terms from the earliest filing date, protection could extend until approximately 2039 or 2040, accounting for patent term adjustments.

Q5: How does this patent influence freedom to operate for competitors?
Given its scope, the patent could pose significant barriers for competitors developing similar compounds. However, detailed claim analysis is necessary to assess specific freedom-to-operate risks.


References

[1] United States Patent and Trademark Office. U.S. Patent No. 11,446,512.
[2] Patent Landscape Reports (Source: IQVIA, Clarivate, Patentscope).
[3] Recent patent filings in the therapeutic area (e.g., Oncology, Neurology).

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Drugs Protected by US Patent 11,446,512

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Sun Pharm Inds Inc LEVULAN aminolevulinic acid hydrochloride SOLUTION;TOPICAL 020965-001 Dec 3, 1999 RX Yes Yes 11,446,512 ⤷  Get Started Free TREATMENT OF ACTINIC KERATOSES BY PHOTODYNAMIC THERAPY ⤷  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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