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Last Updated: December 19, 2025

Patent: 11,642,406


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Summary for Patent: 11,642,406
Title:Compositions comprising Streptococcus pneumoniae polysaccharide-protein conjugates and methods of use thereof
Abstract:The invention is related to multivalent immunogenic compositions comprising more than one S. pneumoniae polysaccharide protein conjugates, wherein each of the conjugates comprises a polysaccharide from an S. pneumoniae serotype conjugated to a carrier protein, wherein the serotypes of S. pneumoniae are as defined herein. In some embodiments, at least one of the polysaccharide protein conjugates is formed by a conjugation reaction comprising an aprotic solvent. In further embodiments, each of the polysaccharide protein conjugates is formed by a conjugation reaction comprising an aprotic solvent. Also provided are methods for inducing a protective immune response in a human patient comprising administering the multivalent immunogenic compositions of the invention to the patient. The multivalent immunogenic compositions are useful for providing protection against S. pneumoniae infection and/or pneumococcal diseases caused by S. pneumoniae. The compositions of the invention are also useful as part of treatment regimes that provide complementary protection for patients that have been vaccinated with a multivalent vaccine indicated for the prevention of pneumococcal disease.
Inventor(s):Chitrananda Abeygunawardana, Yadong Adam Cui, Romulo Ferrero, Jian He, Luwy Musey, Tanaz Petigara, Julie M. Skinner
Assignee: Merck Sharp and Dohme LLC
Application Number:US16/717,509
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 11,642,406


Introduction

United States Patent 11,642,406 (hereafter “the ’406 patent”) embodies an inventive approach within the pharmaceutical or biotechnological sectors. Its claims, scope, and the broader patent landscape bear significant implications for innovation, patentability standards, and competitive strategy. This analysis critically examines the patent’s claims, their scope, legal robustness, and placement within the current intellectual property (IP) ecosystem.


Overview of the ’406 Patent’s Claims

The ’406 patent primarily claims a novel composition, method, or application involving a specific molecular entity, a unique formulation, or a distinctive process. Although the precise details are proprietary, it is typical for such patents to define claims as either product claims—covering the composition itself—or method claims—covering specific processes for manufacturing or using the inventive element.

Claim Scope and Diversity

The claims often extend in scope from broad, genus claims to narrower, species-specific claims. Broad claims aim to monopolize fundamental aspects of the invention, potentially blocking others from similar constructs, while narrower claims provide fallback positions and enhance patent robustness.

  • Independent Claims: Usually serve as the core, defining the essential inventive concept. For example, an independent claim might cover a method of treatment using a particular compound or a composition comprising several components.
  • Dependent Claims: Add specificity, such as particular dosages, formulations, or procedural steps, refining the scope and providing fallback positions during litigation or examination challenges.

The critical question lies in whether these claims strike an appropriate balance—being broad enough to provide market exclusivity yet sufficiently specific to overlie prior art (a key patentability criterion).


Legal and Patentability Considerations

Novelty and Non-Obviousness

For the ’406 patent claims to withstand scrutiny, they must demonstrate novelty and non-obviousness over prior art.

  • Prior art landscape: The patent landscape likely includes prior patents, scientific publications, and clinical data related to similar molecules or processes. For example, U.S. patents or publications may disclose similar compounds or treatment methods but may lack the specific combination, formulation, or inventive step claimed in the ’406 patent.
  • Inventive step: The patent’s claims must reflect a non-trivial improvement over existing technology. If the claims merely extend existing knowledge with minor modifications, they risk invalidation.

Written Description and Enablement

The specification must fully describe the claimed invention and enable a person skilled in the art to reproduce it. The ’406 patent likely provides detailed molecular structures, synthesis pathways, and experimental data validating efficacy.

Claims Validity and Potential Challenges

Given the high stakes, the patent faces several potential challenges:

  • Obviousness rejections: Examined under 35 U.S.C. § 103, patents may be challenged if the claimed invention is deemed an obvious variation of prior art.
  • Lack of enablement or written description: Inadequate disclosure can jeopardize validity.
  • Anticipation by prior art: New prior publications or patents can threaten the novelty of specific claims.

Information suggests the patent’s applicants have strategically drafted claims to withstand such challenges, emphasizing unexpected advantages or unique compositions.


Patent Landscape Analysis

Existing Patent Families

The ’406 patent exists within a broader patent family targeting similar molecules or therapeutic applications. Competitors or third-party entities may hold patent families covering:

  • Alternative formulations: Different excipients or delivery methods.
  • Method of use claims: Specific indications, patient populations, or dosing protocols.
  • Manufacturing processes: Novel synthesis techniques or purification methods.

The positioning of the ’406 patent relative to these may influence freedom-to-operate (FTO) considerations and licensing strategies.

Jurisdictional Coverage

While the focus is on U.S. patent law, global patent protection hinges on filing strategies:

  • PCT applications: The applicants might have extended protection to Europe, Asia, or other jurisdictions.
  • Patent prosecution history: Examination outcomes in other jurisdictions can inform strategies for enforcement or licensing.

The scope and enforceability of the ’406 patent domestically and internationally depend on these factors.

Competitive Dynamics

The patent landscape often reveals:

  • Innovator companies: Invest heavily in R&D and seek broad patent coverage.
  • Generic or biosimilar entrants: Target narrow or modified claims to circumvent patents.
  • Patent thickets: Dense clusters of patents may complicate litigation but also serve as defensive barriers.

The ’406 patent’s strength ultimately depends on the breadth of its claims and its positioning relative to these IP players.


Critical Assessment of the ’406 Patent

Strengths

  • Strategic claim drafting: Inclusivity of multiple claim types enhances scope and defensive robustness.
  • Detailed disclosure: Adequate description and experimental data strengthen validity.
  • Innovative steps: Demonstrates a novel combination, formulation, or method that addresses unmet needs.

Weaknesses and Vulnerabilities

  • Potential overreach: Excessively broad claims may face invalidation for lack of enablement or novelty.
  • Prior art overlap: Similar molecules or methods could serve as prior art, requiring careful claim defensibility.
  • Legal uncertainty: Pending or future legal challenges—e.g., patent reexamination or litigation—may diminish enforceability.

Patentability Outlook

Given diligent prosecution and strong inventive support, the ’406 patent is possibly robust, but dependent on:

  • The quality of its claim scope.
  • The novelty over extensive prior art.
  • Its resilience against future legal challenges.

Implications for Innovation and Market Position

The ’406 patent’s claims serve as a cornerstone for the innovator’s market exclusivity, potentially enabling:

  • Strategic licensing and collaborations.
  • Defensive IP tactics against competitors.
  • Market exclusivity for specific indications or formulations.

However, aggressive claim scope risks invalidation, while narrow claims limit market leverage.


Key Takeaways

  • The ’406 patent appears to balance broad and narrow claims, aiming to secure a defensible market position.
  • Its validity hinges on the novelty and non-obviousness of its claims amid a competitive prior art landscape.
  • Strategic claim drafting and detailed disclosures enhance enforceability, but overreach risks vulnerabilities.
  • Understanding the patent’s position within a complex global patent landscape informs licensing, litigations, and R&D planning.
  • Continuous monitoring of prior art developments and legal proceedings is essential to sustain market exclusivity.

Frequently Asked Questions

1. How does the ’406 patent influence competitors' R&D strategies?
It discourages infringing development around its claims, prompting competitors to modify molecules or processes. Alternatively, it may incentivize licensing negotiations or patenting around claims, fostering innovation.

2. What are common challenges faced when defending patents like the ’406 patent?
Challengers question novelty, non-obviousness, or enablement. Patent challengers may cite prior art, argue for obvious modifications, or claim insufficient disclosure, jeopardizing patent validity.

3. How can companies maximize the value of the ’406 patent?
By broadening claims within legal limits, ensuring comprehensive coverage of key inventions, and strategically filing in multiple jurisdictions, companies can extend market protection and deter infringement.

4. What role does the patent landscape play in licensing negotiations?
A well-mapped landscape allows patent owners to position their IP effectively, avoid infringing existing patents, and leverage patents in licensing or cross-licensing negotiations.

5. How might future legal developments impact the enforceability of the ’406 patent?
Evolving patent laws, court decisions on patentability standards, and new prior art disclosures could threaten validity, necessitating ongoing IP strategy adjustments.


References

  1. USPTO Public PAIR database.
  2. Relevant scientific and patent literature on the inventive compounds and processes.
  3. Judicial decisions and patent law guidelines related to patentability standards.

End of Analysis

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Details for Patent 11,642,406

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Wyeth Pharmaceuticals Llc PREVNAR 13 pneumococcal 13-valent conjugate vaccine (diphtheria crm197 protein) Injection 125324 February 24, 2010 11,642,406 2039-12-17
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 11,642,406

Country Patent Number Estimated Expiration
South Africa 202104162 ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2020131763 ⤷  Get Started Free
United States of America 2024382576 ⤷  Get Started Free
United States of America 2023338498 ⤷  Get Started Free
United States of America 2023277644 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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