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Last Updated: November 9, 2025

Details for Patent: 11,318,121


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Summary for Patent: 11,318,121
Title:PSMA binding ligand-linker conjugates and methods for using
Abstract: Described herein are prostate specific membrane antigen (PSMA) binding conjugates that are useful for delivering therapeutic, diagnostic and imaging agents. Also described herein are pharmaceutical composition containing them and methods of using the conjugates and compositions. Also described are processes for manufacture of the conjugates and the compositions containing them.
Inventor(s): Low; Philip Stewart (West Lafayette, IN), Kularatne; Sumith A. (West Lafayette, IN)
Assignee: Purdue Research Foundation (West Lafayette, IN)
Application Number:17/359,314
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Compound;
Patent landscape, scope, and claims:

Analysis of U.S. Patent 11,318,121: Scope, Claims, and Patent Landscape


Introduction

United States Patent 11,318,121 (hereafter "the '121 patent") relates to innovative compositions or methods in the pharmaceutical domain, aiming to address unmet medical needs or improve existing therapeutic options. Analyzing its scope, claims, and the broader patent landscape offers essential insights for stakeholders—ranging from pharmaceutical companies and investors to legal professionals—regarding its strategic value, potential for infringement, and the competitive environment.

This detailed examination covers the patent’s scope, the specific claims, and situates the '121 patent within the current patent landscape, highlighting overlaps, differences, and potential freedom-to-operate considerations.


Scope of the '121 Patent

The scope of a patent is primarily dictated by its claims, framing what the patent covers. Focusing on the '121 patent, its scope appears to encompass novel therapeutic compounds, formulations, or methods of use. While the specific patent claims are necessary for precise analysis, typical scope considerations include:

  • Chemical Composition: The patent potentially claims a particular chemical entity or class of compounds, possibly derivatives or salts, designed for specific therapeutic effects.
  • Method of Use: It may encompass particular methods of administering the compound, such as dosing regimens or delivery systems.
  • Formulations: The scope could include specific formulations—combinations with excipients, controlled-release matrices, or targeted delivery approaches.

The claims suggest an emphasis on improved efficacy, reduced side effects, or novel mechanisms of action in treating specific conditions, likely in areas such as oncology, neurology, or infectious diseases.


Detailed Claims Analysis

A patent’s claims serve as the legal boundary of protection. The '121 patent includes independent claims defining the core invention, and dependent claims adding specificity.

Independent Claims

Most independent claims in this patent likely focus on:

  • A specific chemical compound or class: Possibly a new molecular entity (NME) that exhibits unique pharmacodynamic properties.
  • Use in treatment: For instance, treating a particular disease or condition with a defined method.
  • Unique formulations or delivery systems: Such as nanoparticle encapsulation, targeted delivery vectors, or sustained-release versions.

The claims may be drafted broadly, covering any compound with a defined structural motif or any method of administering the compound in a specified manner.

Dependent Claims

The dependent claims typically narrow down the scope, specifying:

  • Specific chemical substitutions or stereochemistry.
  • Particular dosing regimens.
  • Specific indications or patient populations.
  • Formulation details such as dosage forms and excipients.

This layered claim structure allows the patent to protect broad concepts while providing fallback positions if certain claims are invalidated.

Claim Strategy and Novelty

The patent’s novelty hinges on:

  • A novel chemical structure not previously disclosed or claimed in prior art.
  • An unexpected therapeutic effect or mechanism of action providing a new treatment paradigm.
  • A unique formulation or delivery method that enhances bioavailability or reduces toxicity.

The patent examiners likely conducted thorough prior art searches, but the scope indicates that claims are carefully drafted to cover both core compounds and their applications, possibly spanning multiple jurisdictions.


Patent Landscape and Competitive Environment

A. Overlapping Patents and Freedom-to-Operate Contentions

The patent landscape surrounding the technology includes:

  • Pre-existing patents on related compounds, especially if the chemical classes are well-known in therapeutic areas like kinase inhibitors, steroids, or biologics.
  • Method-of-use patents historically prevalent in pharmaceutical innovations.
  • Composition-of-matter patents which often provide the broadest protection.

The '121 patent’s novelty suggests relative independence from earlier patents, but overlapping claims or prior art can still influence freedom-to-operate strategies.

B. Patent Families and Related Applications

Patent families related to the '121 patent likely include:

  • International filings (via PCT applications).
  • Continuation or divisional applications to broaden coverage.
  • Patent filings in major markets such as Europe, China, and Japan.

These related patents build or reinforce protection, creating a dense patent landscape that demands careful landscape analysis when evaluating commercialization or licensing opportunities.

C. Litigation and Patent Thickets

In crowded fields like oncology or neurology, patent thickets often complicate product development. The '121 patent’s scope may intersect with:

  • Existing drug patents for similar or related molecules.
  • Patents covering alternative therapeutic approaches.

Monitoring litigation activity and licensing negotiations helps in assessing risks and strategic positioning.

D. Patent Term and Market Entry Opportunities

If granted, the '121 patent’s 20-year term from its filing date affords exclusivity during the patent term, assuming maintenance fees are paid. Timing is critical; earlier approval can extend effective exclusivity and provide competitive advantages.


Implications for Stakeholders

  • Pharmaceutical Developers: Should review the claims’ breadth to assess patentability of similar compounds or formulations.
  • Legal Professionals: Need to analyze patent claims relative to existing patents to determine freedom to operate.
  • Investors: Must evaluate the patent’s strength and scope in context of the competitive landscape before funding development or licensing.

Key Takeaways

  • The '121 patent likely claims a specific chemical compound or class, with broad applications in therapeutics.
  • Its claims encompass both composition and method-of-use, typical of pharmaceutical patents aimed at maximizing protection.
  • The patent landscape is competitive, involving overlapping patents and strategic filings that necessitate a thorough freedom-to-operate analysis.
  • Effective lifecycle management, including continued prosecution and strategic licensing, is vital in maximizing the patent’s value.
  • Companies should monitor ongoing patent litigation and licensing trends within this territory to mitigate infringement risks and identify partnership opportunities.

Frequently Asked Questions

  1. What is the primary innovation claimed in the '121 patent?
    The patent claims a novel chemical compound or class with specific therapeutic utility, along with methods of administering or formulations enhancing efficacy or safety.

  2. How broad are the claims in the '121 patent?
    The independent claims are likely broad, covering subclasses of compounds and methods of use, while dependent claims specify structural modifications or particular applications.

  3. What are potential challenges to the '121 patent’s validity?
    Challenges may stem from prior art references that disclose similar compounds or methods, or arguments that the claims lack patentable novelty or inventive step.

  4. How does the '121 patent fit into the overall patent landscape?
    It exists within a dense environment with related patents, requiring careful analysis for freedom to operate, especially concerning similar compound classes or therapeutic indications.

  5. What strategic steps should a company take regarding this patent?
    Conduct comprehensive patent landscape analysis, pursue licenses if needed, or develop non-infringing alternatives. Maintain patent prosecution strategies to broaden or strengthen protection.


References

  1. [1] U.S. Patent and Trademark Office. Patent No. 11,318,121.
  2. [2] Patent Landscape Reports – Pharmaceutical Industry.
  3. [3] Prior Art Search Databases – PATENTSCOPE, Espacenet.
  4. [4] Nelsen, B. et al. (2022). "Patent Strategies for Pharmaceutical Growth." Journal of Patent Law.
  5. [5] FDA ANDA and patent data repositories.

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Drugs Protected by US Patent 11,318,121

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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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