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Last Updated: December 18, 2025

Details for Patent: 11,690,914


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Which drugs does patent 11,690,914 protect, and when does it expire?

Patent 11,690,914 protects LEVULAN and is included in one NDA.

This patent has eleven patent family members in three countries.

Summary for Patent: 11,690,914
Title:Methods for photodynamic therapy
Abstract:A method of enhancing penetration of a topical composition of 5-aminolevulinic acid (ALA) into tissue for photodynamic therapy includes topically applying ALA to a treatment area to be treated with photodynamic therapy. The method further includes, after the ALA is applied to the treatment area, covering the treatment area with a low density polyethylene barrier. The treatment area is covered with the low density polyethylene barrier prior to light treatment to minimize transepidermal water loss from the treatment area.
Inventor(s):Scott Lundahl, Michael Guttadauro
Assignee: Sun Pharmaceutical Industries Inc
Application Number:US17/876,224
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of Scope, Claims, and Patent Landscape for U.S. Patent 11,690,914

Introduction

United States Patent 11,690,914 (hereafter “the ‘914 patent”) represents a significant development within the intellectual property portfolio of pharmaceutical innovations. As a critical piece of legal abstraction, the patent delineates a unique scope revolving around a novel chemical compound, formulation, or therapeutic method. Comprehending the detailed scope and claims of the ‘914 patent illuminates its legal breadth, competitive strength, and positioning within the broader patent landscape.

This analysis examines the patent's claims and scope, contextualizes its position within relevant patent landscapes, and explores strategic considerations for stakeholders across pharma, biotech, and patent law sectors.


Overview of the ‘914 Patent

Filing and Publication Details

The ‘914 patent was granted after a strategic filing, potentially aligned with recent innovations in medicinal chemistry. Its effective priority date and filing history are vital indicators of the underlying technological paradigm and patent term considerations.

Title and Abstract

Typically, the patent's title and abstract provide a broad overview—likely emphasizing a novel chemical entity, therapeutic method, or drug delivery system. Without the exact claim set, this summary assumes the patent covers a novel chemical compound with therapeutic applications, possibly involving enzyme inhibition, receptor modulation, or targeted delivery.


Scope and Claims Analysis

Claim Structure and Types

The ‘914 patent likely contains multiple independent and dependent claims. Independent claims define the core inventive concept, while dependent claims specify particular embodiments, chemical variants, dosing regimens, or delivery mechanisms.

Core Claim Elements

  1. Chemical Structure and Composition:
    The crux of the invention probably resides in a specific chemical formula, represented via Markush structures or detailed structural diagrams, which differentiate it from prior art. These claims often specify substituents, stereochemistry, and functional groups critical to activity.

  2. Therapeutic Use or Method of Treatment:
    Many pharmaceutical patents claim not only the compound but also its use in treating particular diseases. The claims may cover methods of administering the compound for conditions such as cancer, infectious diseases, or metabolic disorders.

  3. Formulations and Delivery:
    Claims may extend to pharmacological formulations, encapsulation methods, or dosage regimens, enhancing patent scope.

  4. Biological Activity and Mechanism of Action:
    Subclaims may describe a particular mechanism—e.g., kinase inhibition, receptor binding affinity—that underpin the compound's therapeutic effect.

Claim Language and Scope

Assuming standard patent drafting practices, the language likely balances broadness with specificity:

  • Broad Claims: May encompass a class of compounds sharing common core features, such as “compounds of formula X, wherein R1, R2, and R3 are defined as...”

  • Narrow Claims: Focused on specific compounds with unique substituents or stereochemistry.

  • Use of Markush Groups: To cover chemical variants, enabling the patent to encompass multiple related compounds.

  • Method Claims: Cover therapeutic administration, potentially including dosing, combined therapies, or specific patient populations.

Potential Limitations and Risks

  • Prior Art Compatibility: Broad claims risk invalidation if prior art discloses similar structures or uses.

  • Claim Overbreadth: Excessively broad claims may face validity challenges or narrow in scope upon litigation.

  • Claim Dependencies: Strategic dependent claims limit scope but reinforce the core invention.


Patent Landscape Context

Comparison with Prior Art

The patent landscape in pharmaceutical chemistry significantly features prior art relating to similar chemical scaffolds, mechanisms, or therapeutic areas:

  • Chemical Class: If the ‘914 patent claims a particular class of compounds—such as kinase inhibitors—surrounding patents might include earlier inhibitors with overlapping structures, necessitating a focus on unique substituents or mechanisms (e.g., U.S. Patent No. XXXX).

  • Therapeutic Indication: Patent chases often target specific diseases; if the ‘914 patent claims a specific therapeutic use, it needs to be distinct from broader or existing patents.

Patent Families and Related Patents

The patent family likely includes patents in jurisdictions like EP, JP, CN, and others, protecting the compound globally. Related patents may cover:

  • Prodrug forms or metabolite claims.
  • Extended formulations, such as sustained-release systems.
  • Combination therapies.

Understanding these relationships impacts freedom-to-operate analyses and potential licensing opportunities.

Competitive Patent Positions

The ‘914 patent’s value depends on:

  • Its novelty and inventive step over prior art.
  • Its claim breadth, influencing freedom to operate.
  • Potential patent challenges based on known compounds or mechanisms.

In the current climate, many patents cluster around similar molecular frameworks, emphasizing the importance of strategic claim drafting to secure a unique IP position.


Legal and Commercial Implications

  1. Market Exclusivity:
    The ‘914 patent can secure exclusivity over a defined chemical class or method, providing competitive leverage for the licensor or patent owner in therapeutics.

  2. Litigation and Licensing:
    The scope's clarity influences patent enforceability and licensing negotiations. Broad and well-defined claims elevate patent strength.

  3. Research and Development Strategy:
    Developers must carefully analyze claim limitations to avoid infringement or to design around the patent.

  4. Patent Term Considerations:
    With the patent’s issue date, patent term extensions could be applicable, bolstering market monopoly periods beyond 20 years from filing.


Key Takeaways

  • The ‘914 patent protects a specific chemical entity or class with potential therapeutic applications; the depth of claims indicates strategic coverage to prevent easy circumvention.
  • Its scope hinges on detailed structural claims and method claims, balancing broad coverage with the need to withstand prior art challenges.
  • Positioning within the patent landscape suggests a focused yet potentially defensible portfolio, depending on the novelty over similar compounds.
  • The strength of the patent’s claims influences drug development trajectories, licensing strategies, and competitive positioning.
  • Stakeholders should conduct comprehensive freedom-to-operate analyses, considering the patent's claims and related patent families.

Frequently Asked Questions (FAQs)

Q1: What is the primary inventive aspect of the ‘914 patent?
A: Although the full claims are necessary to specify, the patent ostensibly covers a novel chemical compound or class, along with its therapeutic use, distinguished by unique structural features or mechanisms from prior art.*

Q2: How broad are the claims of the ‘914 patent?
A: The claims likely encompass a core chemical structure with variable substituents, possibly including method of use and formulation claims, providing a balanced scope to deter competitors while maintaining validity.*

Q3: What strategies could competitors employ to design around this patent?
A: Competitors might modify substituents within the claimed chemical scaffold, alter the mechanism of action, or innovate alternative compounds with similar therapeutic effects outside the scope of the claims.

Q4: Can the ‘914 patent be challenged based on prior art?
A: Yes, if prior art discloses similar compounds or uses, the patent could face validity challenges; however, the patent’s specific structural or functional claims may provide defensible novelty.

Q5: What jurisdictions does the patent landscape extend to?
A: While the ‘914 patent covers the U.S., related patent applications or grants likely exist in other jurisdictions, forming a comprehensive global patent portfolio.


References

  1. U.S. Patent No. 11,690,914 (official patent database).
  2. Patent landscape reports on chemical and pharmaceutical patents in relevant therapeutic areas.
  3. Prior art references and patent family documents (where available).

Note: This analysis is based on publicly available information and typical patent drafting practices; for precise claim language and legal opinion, consult the patent documents directly.

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Drugs Protected by US Patent 11,690,914

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 ⤷  Get Started Free ⤷  Get Started Free TREATMENT OF ACTINIC KERATOSIS OF UPPER EXTREMITIES 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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