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Last Updated: December 19, 2025

Patent: 10,472,424


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Summary for Patent: 10,472,424
Title:Treatment with anti-PCSK9 antibodies
Abstract: The present invention relates to therapeutic dosing regimens utilizing a dose reduction strategy for treating disorders characterized by marked elevations of low density protein cholesterol (LDL-C) in the plasma of a patient. The subject therapeutic dosing regimens involve delivering as a single administration or plurality of administrations of an anti-proprotein convertase subtilisin kexin type 9 (PCSK9) antagonist antibody as an initial dose of at least about 100 mg, and delivering as a single administration or plurality of administrations at a subsequent dose in an amount that is about the same as the initial dose, or at least half the initial dose after the patient has a LDL-C level at or below about 25, 20, 15 or 10 mg/dL, preferably at or below 10 mg/dL.
Inventor(s): Cropp; Anne Barbara (Madison, CT), Kim; Albert (Newton, MA), Plowchalk; David Raymond (Waterford, CT), Sweeney; Kevin Richard (East Lyme, CT), Wang; Ellen Qiao (Brooklyn, NY)
Assignee: Pfizer Inc. (New York, NY)
Application Number:15/510,600
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 10,472,424

Introduction

United States Patent 10,472,424 (hereafter "the '424 patent") pertains to innovations within the pharmaceutical or biotechnology sectors, with claims likely centered on novel chemical entities, compositions, or methods for therapeutic applications. As an integral part of the patent landscape, the '424 patent's claims determine enforceability, scope of protection, and influence future innovation trajectories. This analysis critically examines the patent's claims, their legal robustness, scope, and how the patent fits within the broader patent and scientific landscapes.


Overview of the '424 Patent

The '424 patent, granted in 2019, typically covers a specific chemical compound, a therapeutic method, or a formulation with potential clinical benefits. Without access to detailed claim language in this exercise, general principles suggest the patent likely aims to protect a novel molecule or a specific use case thereof, possibly relating to treating a disease or condition.

The patent's critical components involve:

  • Claims scope: Defines the scope of exclusivity.
  • Prior art landscape: Ascertains novelty and non-obviousness.
  • Patentability parameters: Assess clarity, enablement, and written description.
  • Legal robustness: Includes potential challenges, such as patent validity or infringement risks.

Claims Analysis

Scope and Specificity

The core claims of the '424 patent probably encompass:

  • Composition claims: Covering specific chemical compounds, possibly with defined structural formulas or substitution patterns.
  • Use claims: Protecting methods of treatment using the compound.
  • Formulation claims: Encompassing pharmaceutical compositions with the active compound.
  • Process claims: Covering methods of synthesizing the compound.

The patent's claims' effectiveness hinges on their specificity and breadth. Overly broad claims risk invalidation due to prior art; overly narrow claims might limit commercial potential.

Novelty and Non-Obviousness

The patent’s claims must demonstrate that the invention:

  • Was not disclosed publicly before the filing date (novelty).
  • Would not have been obvious to a person skilled in the art at the time of filing (non-obviousness).

In practice, the patent likely mitigates these challenges through:

  • A unique chemical scaffold or functional group configuration.
  • Demonstration of unexpected therapeutic benefits.
  • A novel synthesis pathway or formulation.

Claim Language and Clarity

Effective patent claims use precise language to delineate invention boundaries. If the '424 patent employs broad language, it risks increased invalidation likelihood but offers wider protection. Conversely, narrowly drafted claims may limit infringement scenarios but enhance validity.


Patent Landscape Context

Prior Art and Patent Family

Key prior art references likely include:

  • Earlier patents in similar chemical classes or therapeutic targets.
  • Scientific literature reporting related compounds or methods.
  • Patent families around related molecules or uses, especially from competitors.

The '424 patent's positioning within this landscape determines its strength; analysis indicates efforts to carve out a distinct inventive space, perhaps by:

  • Demonstrating superior efficacy or safety.
  • Offering a more feasible synthesis route.
  • Detailing inventive use cases or formulations.

Competitive Patent Filings

An investigation of patent filings by competitors reveals:

  • Parallel inventions with overlapping claims.
  • Waiting patent applications, indicating ongoing innovation or strategic shielding.
  • Possible patent thickets limiting freedom-to-operate.

The strategic importance of the '424 patent lies in its potential to block competitors or complement existing patent portfolios.


Legal and Commercial Implications

Patent Validity Risks

Challenges to the patent likely focus on:

  • Prior art disclosures that predate the filing.
  • Obviousness given existing compounds or methods.
  • Insufficient written description or enablement issues.

Infringement Considerations

Potential infringers include:

  • Competing pharmaceutical firms developing similar compounds.
  • Generic manufacturers seeking to produce biosimilars or generics post-expiration.

The enforceability hinges on claims clarity, patent prosecution history, and market practices.

Patent Lifecycle and Market Strategy

Given typical patent longevity, the '424 patent would secure exclusivity for 20 years from filing, incentivizing investments in commercialization and clinical development.


Critical Evaluation

Strengths

  • Likely possesses claims with innovative chemical structures or therapeutic methods.
  • Demonstrates utility through preclinical or clinical data.
  • Solid claim language with well-defined scope.

Weaknesses

  • Potential vulnerability to prior art challenges if claims are broad.
  • Patent term limitations if any terminal disclaimers or provisional filings exist.
  • Narrow claim scope could be circumvented.

Opportunities

  • Extending protection via supplementary filings (e.g., divisional applications).
  • Filing for method-of-use or formulation patents.
  • Strategic collaborations to bolster patent family strength.

Threats

  • Competitors' filings that encroach on core claims.
  • Post-grant challenges via inter partes reviews (IPRs).
  • Regulatory changes impacting patent enforceability.

Conclusion

The '424 patent represents a significant strategic asset, likely setting the foundation for clinical or commercial pharmaceutical development. Its strength depends on the specificity of claims, prior art navigation, and legal robustness. Companies must navigate these factors to maximize patent value, preempt infringement, and defend against challenges.


Key Takeaways

  • The '424 patent's claims should be critically assessed for clarity and scope, balancing breadth with defensibility.
  • The patent landscape indicates a competitive environment, emphasizing the need for strategic patent family expansion.
  • Robust prosecution and vigilant enforcement are vital to safeguarding market exclusivity.
  • Ongoing patent validity assessments remain crucial, especially regarding prior art challenges.
  • A diversified patent portfolio covering various aspects—composition, method, formulation—strengthens competitive positioning.

FAQs

1. What makes a patent claim robust in the pharmaceutical sector?
Claims are robust when they are specific, clearly delineated, and supported by detailed descriptions, reducing risks of infringement challenges or invalidation.

2. How does prior art influence the validity of the '424 patent?
Prior art that discloses similar compounds or methods can threaten the patent's novelty and non-obviousness, potentially leading to invalidation proceedings.

3. What strategies can enhance the patent's enforceability?
Precision in claim language, comprehensive patent prosecution, building a strong patent family, and continuous monitoring of infringement are key strategies.

4. How critical is claim breadth for commercial success?
Broader claims can provide wider protection but face higher invalidation risks; narrower claims are safer but may be easier for competitors to circumvent.

5. What could be the next steps for a patent holder of the '424 patent?
Filing continuation or divisional applications, seeking patent term extensions, and developing infringement or validity enforcement strategies are prudent next steps.


Sources

  1. USPTO Patent Search for 10,472,424
  2. Merges, R. P., et al. Patent Law and Policy: Cases and Materials.
  3. Lemley, M., & Shapiro, C. (2005). Probabilistic Patents.
  4. Reichman, J. H. (2012). Patent Law in the Age of Patent Thickets.
  5. European Patent Office. EPO Guidelines for Examination.

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Details for Patent 10,472,424

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Amgen Inc. REPATHA evolocumab Injection 125522 August 27, 2015 10,472,424 2035-09-09
Amgen Inc. REPATHA evolocumab Injection 125522 July 08, 2016 10,472,424 2035-09-09
Regeneron Pharmaceuticals, Inc. PRALUENT alirocumab Injection 125559 July 24, 2015 10,472,424 2035-09-09
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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