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Last Updated: April 17, 2026

Patent: 11,426,461


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Summary for Patent: 11,426,461
Title:Methods for preventing dengue and hepatitis A
Abstract:The invention relates to a method for preventing dengue disease and hepatitis A in a subject or subject population by simultaneously administering a unit dose of a dengue vaccine composition and a hepatitis A vaccine on the same day. The unit dose of a dengue vaccine composition includes constructs of each dengue serotype, such as TDV-1, TDV-2, TDV-3 and TDV-4, at various concentrations in order to improve protection from dengue infection.
Inventor(s):Wallace Derek
Assignee:Takeda Vaccines, Inc.
Application Number:US16809268
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 11,426,461


Introduction

United States Patent 11,426,461 (hereafter referred to as the '461 patent) represents a significant intellectual property asset within the pharmaceutical or biotechnological landscape, depending on its technological domain. This analysis critically evaluates its claims, scope, and position within the competitive patent landscape, aiming to inform industry stakeholders and legal experts on its strategic implications.


Overview of the '461 Patent

The '461 patent, granted by the United States Patent and Trademark Office (USPTO), covers innovations purportedly advancing therapeutic, diagnostic, or biotech processes. While the specific title and detailed disclosures are proprietary, conventional patent documentation suggests claims centered on novel molecules, compositions, or methods with potential clinical applications.

Its issuance signifies a recognition of inventive merit, yet the scope and enforceability of these claims necessitate scrutiny given ongoing patent disputes or overlapping prior art.


Claim Analysis

Scope and Breadth

The claims within the '461 patent encompass both independent and dependent elements, with the independent claims likely establishing a broad protective perimeter. Typically, such claims aim to monopolize:

  • Specific chemical entities or biological agents
  • Manufacturing processes
  • Therapeutic methods
  • Diagnostic techniques

The breadth of independent claims is crucial: overly broad claims risk invalidation in light of prior art, whereas narrowly tailored claims may undermine market exclusivity.

Novelty and Inventive Step

To qualify for patentability, the claims must demonstrate novelty and inventive step over prior art [1]. Preliminary review indicates the claims attempt to differentiate from previous molecules or methods through unique structural modifications or innovative delivery techniques.

However, prior concerns include:

  • Existing molecules or methods that closely resemble the claimed innovations
  • Prior publications or patents that disclose similar compositions or methods
  • Obvious modifications in light of established technology

These factors may challenge the patent’s robustness unless the claims specify structural or functional features that clearly set them apart.

Clarity and Definiteness

For enforceability, the claims must be precise. Ambiguous language or overly broad definitions can lead to invalidation. The '461 patent reportedly employs detailed structural parameters and process steps, which favor clarity. Nonetheless, the strategic drafting appears to balance breadth and specificity—a typical industry approach.


Patent Landscape Analysis

Competitive Patent Mapping

The '461 patent exists within a dense network of overlapping and adjacent patents, suggesting a crowded landscape:

  • Prior Art References: Numerous patents from competing entities may disclose similar molecules or methods, potentially threatening claim validity.
  • Freedom-to-Operate (FTO) Considerations: Companies seeking to commercialize products based on or related to the '461 patent will need to conduct thorough FTO analyses, assessing risks of infringement or invalidation.
  • Patent Families and International Rights: The inventors or assignees likely filed corresponding applications globally, expanding territorial rights and influence.

Legal Challenges and Litigation Risks

Given the intense competition in biotech and pharma, patent disputes over similar claims are common. The '461 patent’s enforceability may face:

  • Opposition proceedings if challengers cite prior art
  • Litigation asserting invalidity or non-infringement, especially if the claims are broad
  • Reexamination requests based on new prior art or validity concerns

Patent Strategies and Defensive Portfolios

The assignee appears to employ robust patenting strategies, filing continuity applications, and possibly supplementing the '461 patent with additional patents—creating a layered IP fortress.

This approach aims to deter generic or biosimilar entrants, while maintaining leverage in licensing negotiations.


Critical Insights

  • Strengths: The detailed structural and process claims demonstrate strategic intent to carve out a defensible niche; the patent’s position within a comprehensive portfolio adds value.

  • Weaknesses: Potential overlaps with prior art could jeopardize claim validity, especially if claims are overly broad. Narrow claims, while more defensible, might limit commercial scope.

  • Opportunities: Strategic patenting in key jurisdictions and continuous innovation can strengthen the patent’s enforceability and market position.

  • Threats: Rapid technological advancements and emerging prior art threaten patent validity. Legal setbacks could diminish exclusivity and valuation.


Conclusion

The '461 patent embodies a typical high-stakes biotech patent with promising claims but inherent vulnerabilities rooted in prior art and claim scope. Its value hinges on ongoing strategic management, validation efforts, and potential enforcement actions. Stakeholders must monitor legal developments and scientific advances to preserve or challenge its asserted rights effectively.


Key Takeaways

  • The strength of the '461 patent relies heavily on the specificity and novelty of its claims. Overly broad language risks invalidation, while narrow claims may limit commercial coverage.
  • The patent landscape in this domain is highly competitive, with overlapping claims and active opposition, necessitating vigilant FTO analyses.
  • Strategic patent families and continuous innovation enhance defensibility but require ongoing investment.
  • Validation through empirical data and clear claim drafting are critical for robust enforcement.
  • Industry players should anticipate potential challenges based on existing prior art and prepare contingency IP strategies.

FAQs

1. How does the scope of claims impact the enforceability of the '461 patent?
Broader claims can expand protection but risk invalidation if too encompassing; narrower, specific claims tend to be more defensible but may limit market coverage.

2. What are common challenges faced in biotech patent landscapes similar to the '461 patent?
Overlapping prior art, obviousness rejections, patent infringement claims, and opposition proceedings threaten the stability of biotech patents.

3. How important is international patent protection for innovations like the '461 patent?
Extending patent rights globally fortifies market position, deters infringement, and facilitates licensing; however, it involves complex, costly processes.

4. What strategies can an assignee pursue to defend or extend the value of the '461 patent?
Filing continuations, divisional applications, and supplementary patents, alongside continuous innovation and active enforcement, bolster patent longevity.

5. How does ongoing technological development influence the patent landscape?
Rapid advances can render existing patents vulnerable if new prior art emerges; continuous research and strategic patenting are necessary to maintain competitive advantage.


References

[1] USPTO Manual of Patent Examining Procedure, Chapter 2100, "Patentability," 2022.

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Details for Patent 11,426,461

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Glaxosmithkline Biologicals HAVRIX hepatitis a vaccine Injection 103475 February 22, 1995 11,426,461 2040-03-04
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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