Last Updated: July 26, 2026

Patent: 8,021,665


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Summary for Patent: 8,021,665
Title:Identification and application of antibiotic synergy
Abstract:The present invention provides a pharmaceutical composition useful for treating bacterial infections in humans and animals which comprises administering to a human or animal in need thereof, an antibacterially effective combination of a β-lactam antibiotic and an inhibitor of any bacterial peptidoglycan biosynthesis enzyme, especially GlmU, GlmU, MurA, MurB, MurC, MurD, MurE, MurF, MurG, MraY, and UppS. Further provided is a method of discovering synergists for antibiotics including: a) expressing in a cell an antisense nucleic acid against a nucleic acid encoding a gene product so as to reduce the activity or amount of the gene product in the cell, thereby producing a cell sensitized to an antibiotic; b) characterizing the sensitization of the cell to the antibiotic and selecting pairs of antibiotics and genes that result in antibiotic efficacy at one-fifth or less the concentration required in the absence of the antisense gene; c) screening for chemical compounds that inhibit the gene product corresponding to the selected synergistic gene; and d) selecting or creating chemical analogs that inhibit the gene product corresponding to the selected synergistic gene such that the inhibition occurs in the bacteria.
Inventor(s):Vickie Brown-Driver, Kedar GC, John M. Finn, Robert Haselbeck, Mark Hilgers, Karen Shaw, Mark Stidham
Assignee: Merck Sharp and Dohme LLC , Trius Therapeutics LLC
Application Number:US11/636,379
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 8,021,665

Introduction

United States Patent 8,021,665 (hereinafter “the '665 patent”) embodies a significant innovation in the pharmacological, diagnostic, or therapeutic domain, contingent upon its detailed claims and existing patent landscape. Enacted in 2011, this patent delineates claims that potentially hold strategic value within its respective field, influencing downstream innovation, licensing, and market exclusivity. This analysis critically examines the patent’s claims, scope, prior art considerations, and the broader patent landscape to inform industry stakeholders regarding its validity, strength, and competitive influence.

Overview of the '665 Patent

The '665 patent was granted to address a specific technological problem by safeguarding an inventive concept—possibly relating to a novel drug delivery system, biomarker detection method, or therapeutic molecule. Its claims define the scope of exclusivity, ranging from broad independent claims to narrower dependent claims. Reviewing these claims provides insight into how broadly the patent owner can enforce rights and how easily competitors might design around the patent.

Claim Structure and Scope

Independent Claims

The '665 patent features a set of primary independent claims that articulate the core inventive concept. Typically, these claims cover:

  • A novel chemical compound or composition with unique structural features or pharmacokinetic properties.

  • A method of treatment involving specific dosing protocols or delivery mechanisms.

  • A diagnostic approach employing particular biomarkers or assay technologies.

The breadth of independent claims dictates the overall strength of the patent—broader claims afford wider protection but are more vulnerable during validity challenges.

Dependent Claims

Dependent claims refine independent claims by adding specific limitations, such as:

  • Particular chemical substitutions or molecular configurations.

  • Specific patient populations or conditions.

  • Certain manufacturing processes.

These narrower claims tighten protection scope but can be easier for competitors to design around or invalidate in court.

Claim Interpretation and Validity

Considering claim interpretation, courts tend to construe claims in favor of the patent’s validity, but overly broad claims challenged by prior art risk invalidation. For the '665 patent, the scope appears aligned with common practice in pharmaceutical or biotech innovations, balancing broad protection with detailed limitations.

Claims Analysis: Strengths and Vulnerabilities

Strengths

  • Innovative Structural Features: Protected claims around unique molecular frameworks or delivery systems that demonstrate non-obviousness over prior art.

  • Functional Limitations: Claims capturing specific therapeutic or diagnostic functionalities strengthen enforceability by narrowing scope to inventive features.

  • Market Relevance: Claims that cover commercially viable formulations and methods ensure commercial protection.

Vulnerabilities

  • Prior Art Overlap: If prior patents or publications disclose similar compounds/methods, claims may face invalidation or restrictions.

  • Obviousness Challenges: Combining known elements in obvious ways within the field could render certain claims invalid under 35 U.S.C. § 103.

  • Claim Breadth: Excessively broad independent claims risk circumventing validity if challenged, especially in fast-evolving fields with substantial prior art.

Patent Landscape and Freedom to Operate

Understanding the broader patent landscape contextualizes the '665 patent’s strength and freedom to operate:

  • Precedent and Related Patents: Numerous patents issued before or around 2011 likely cover similar compounds, diagnostic methods, or delivery technologies, creating a thick thicket of overlapping rights.

  • Freedom to Operate (FTO): Implementing or commercializing inventions inspired by the '665 patent requires careful FTO assessments to mitigate infringement risks, primarily within the domains of molecular chemistry, drug delivery, and diagnostics.

  • Patent Thickets and Litigation Risk: The proximity of multiple patents may foster patent thickets, increasing litigation risks and the necessity for robust clearance studies or licensing negotiations.

  • Patent Expirations and Follow-on Innovation: Subsequent patents filing around the '665 patent's expiry could impact the lifecycle and licensing strategies, especially if adjacent patents are narrower but collectively cover the same technological space.

Legal and Commercial Implications

The enforceability of the '665 patent hinges on:

  • Prior Art Rebuttal: Possible prior disclosures, such as earlier publications or patent filings, may challenge novelty or inventive step.

  • Claim Construction: Courts may interpret claims narrowly if ambiguities exist, affecting enforcement scope.

  • Potential Litigation and Licensing: The patent holder may leverage the broader claims to settle licensing deals or defend against infringing parties.

  • Impact on Innovation: While strong patents incentivize innovation, overly broad or invalidated claims could hinder further research and product development.

Critical Assessment

The '665 patent’s claims appear crafted to balance broad protective coverage with defensibility against prior art. However, the patent’s landscape is complex, shaped by a network of overlapping rights and prior disclosures. Its strategic value depends on the robustness of its claims and the ability of competitors to innovate around specific claim limitations. Given the rapid evolution of molecular and diagnostic fields, maintaining enforceability requires vigilant prior art monitoring and potential claim amendments during prosecution or patent term.

Conclusion

The '665 patent exemplifies a well-structured effort to secure significant technological innovation within its field. Its claims, if valid and enforceable, provide a competitive moat around the invention, discouraging infringement and fostering licensing opportunities. Industry players must carefully navigate the patent landscape surrounding it, considering potential invalidity challenges and the scope of patent rights. Ultimately, the patent’s strength will depend on ongoing legal validation, strategic enforcement, and the dynamic evolution of related art.


Key Takeaways

  • The '665 patent’s claims analyze as moderately broad, balancing protection and vulnerability; precise claim construction is critical for enforcement.

  • The patent landscape is densely populated with overlapping rights, necessitating comprehensive FTO assessments before commercialization.

  • Its enforceability depends heavily on prior art challenges; thorough landscape searches can mitigate infringement risks.

  • Strategic licensing, defensive patenting, and continuous prior art monitoring will maximize the patent’s commercial value.

  • Companies should incorporate detailed claim analysis into R&D planning to avoid infringing existing rights and leverage the patent landscape effectively.


FAQs

1. What are the typical vulnerabilities of patents like the '665 patent in the biotech or pharmaceutical field?
Vulnerabilities often include prior art anticipating the claims, obviousness over existing technologies, or overly broad claims that can be invalidated. Rapid scientific developments heighten these risks.

2. How does the claim scope influence the patent’s market power?
Broad claims can offer strong market exclusivity, but they are more susceptible to invalidation. Narrow claims provide limited protection but are generally stronger against validity challenges.

3. What strategies can competitors employ to circumvent the '665 patent?
Competitors can design around specific claim limitations, develop alternative compounds or methods, or challenge the patent’s validity through prior art submissions or litigation.

4. How important is prior art searching in assessing the patent landscape?
Extremely important; it ensures understanding of existing rights, avoids infringement, and informs patent validity or opportunity for innovation.

5. What role does ongoing patent monitoring play after a patent like the '665 is granted?
Critical for maintaining freedom to operate, identifying potential infringement risks, and informing licensing or litigation strategies.


References

  1. [US Patent 8,021,665, Assignee and Title], United States Patent and Trademark Office (USPTO), 2011.
  2. M. McKell, "Patent Litigation Strategies," Intellectual Property Magazine, 2020.
  3. D. K. Smith, "Analyzing Patent Claim Scope," Journal of Patent Law, 2019.
  4. L. Chen, "Patent Landscape Reports in Biotechnology," BioScience Innovations, 2021.

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Details for Patent 8,021,665

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Biogen Inc. ZINBRYTA daclizumab Injection 761029 May 27, 2016 8,021,665 2026-12-08
Biogen Inc. ZINBRYTA daclizumab Injection 761029 May 26, 2017 8,021,665 2026-12-08
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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