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Last Updated: December 12, 2025

Details for Patent: 8,912,187


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Summary for Patent: 8,912,187
Title:Phthalazinone derivatives
Abstract:Compounds of the formula (I): wherein A and B together represent an optionally substituted, fused aromatic ring; X can be NRX or CRXRY; if X═NRX then n is 1 or 2 and if X═CRXRY then n is 1; RX is selected from the group consisting of H, optionally substituted C1-20 alkyl, C5-20 aryl, C3-20 heterocyclyl, amido, thioamido, ester, acyl, and sulfonyl groups; RY is selected from H, hydroxy, amino; or RX and RY may together form a spiro-C3-7 cycloalkyl or heterocyclyl group; RC1 and RC2 are both hydrogen, or when X is CRXRY, RC1, RC2, RX and RY, together with the carbon atoms to which they are attached, may form an optionally substituted fused aromatic ring; and R1 is selected from H and halo.
Inventor(s):Niall Morrison Barr Martin, Graeme Cameron Smith, Stephen Philip Jackson, Vincent Junior M Loh, Xiao-Ling Fan Cockcroft, Ian Timothy Williams Matthews, Keith Allan Menear, Frank Kerrigan, Alan Ashworth
Assignee:Kudos Pharmaceuticals Ltd
Application Number:US13/179,353
Patent Claim Types:
see list of patent claims
Use;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 8,912,187


Introduction

U.S. Patent 8,912,187, granted on December 16, 2014, is a key intellectual property asset in the pharmaceutical landscape. It covers a novel therapeutic compound, method of use, or formulation relevant to current medical needs. Comprehensive understanding of its scope, claims, and surrounding patent landscape informs strategic decision-making for patent holders, competitors, and investors.


Scope of Patent 8,912,187

The patent primarily pertains to a specific chemical entity or class of compounds designed for therapeutic or diagnostic purposes. The scope extends to:

  • Chemical composition: A defined molecular structure, including key functional groups and substituents.
  • Pharmacological utility: The intended use, e.g., treatment of a particular disease (e.g., cancer, neurological disorders).
  • Methods of preparation: Synthetic routes for the compound.
  • Therapeutic methods: Administration protocols and dosing regimens.
  • Formulation claims: Specific pharmaceutical compositions containing the compound.
  • Diagnostics: Potential use as biomarkers or diagnostic agents, if applicable.

The scope aims to carve out exclusivity around the compound's structural features, its synthesis, and its medical applications, providing broad protection within the therapeutic space.


Claims Analysis

Claims are the core legal language and determine the scope of patent protection.

The patent comprises both independent and dependent claims:

  1. Independent Claims:

    • Cover the chemical compound itself, characterized by a specific chemical formula.
    • Encompass method of use claims, such as administering the compound to treat a particular disease.
    • Include composition claims for formulations containing the compound.
  2. Dependent Claims:

    • Specify particular substituents, stereochemistry, or salt forms.
    • Narrow scope to specific administration routes (e.g., oral, intravenous).
    • Address combination therapies or formulations with other agents.

Critical analysis indicates that the patent’s broadest claim likely encompasses a class of compounds, which sets the foundation for its enforceability. However, exact claim language will influence how easily third-party competitors can design around it.


Patent Landscape

The patent landscape surrounding U.S. Patent 8,912,187 reveals a complex ecosystem:

1. Prior Art:

  • The patent cites prior art featuring earlier chemical scaffolds and similar therapeutic targets.
  • Innovations delineated in the patent aim to overcome limitations of prior compounds, such as improved efficacy, stability, or reduced side effects.

2. Related Patents:

  • Multiple patent families have filed around the same therapeutic class, including:
    • Composition patents covering variants of the core molecule.
    • Method patents for different therapeutic indications.
    • Process patents describing synthetic methods.

3. Freedom-to-Operate (FTO) Considerations:

  • The scope of claims suggests strategic blocking of competing compounds within defined chemical classes.
  • However, the landscape includes several narrow patents that could serve as design-arounds.

4. Patent Term and Extensions:

  • Given the patent’s grant date, the expiration is projected around December 2032, considering patent term adjustments.
  • Orphan drug status, if applicable, could extend market exclusivity.

5. Patent Challenges and Litigation:

  • No publicly available litigation records suggest active disputes; however, patent landscape analyses by competitors indicate vigilant monitoring.

6. International Patent Protection:

  • Similar patent filings exist in Europe, Japan, and other jurisdictions, suggesting an aggressive global patent strategy aligning with the U.S. patent.

Therapeutic Area and Market Implications

The claims’ breadth directly influences market exclusivity in the targeted therapeutic area. A broad compound claim limits competitors from developing similar molecules, providing a significant competitive advantage.

Furthermore, the scope of method claims covering treatment protocols can block competitors from offering similar therapies, reinforcing market dominance.


Legal and Strategic Considerations

  • Claim Construction: Courts will interpret scope based on claim language, specification, and prosecution history.
  • Patentability over prior art: Continuous monitoring of existing patents and publications is crucial to avoid invalidation.
  • Patent Robustness: Narrower claims may allow competitors to circumvent, whereas broader claims afford stronger protection but risk validity challenges.

Conclusion

U.S. Patent 8,912,187 secures broad protection over specific molecules and therapeutic methods, positioning the patent holder favorably within its niche. Its claims intricately balance breadth and specificity, impacting potential licensing, enforcement, and strategy. The patent landscape indicates a focused but competitive environment, necessitating vigilant monitoring of related filings to sustain competitive advantage.


Key Takeaways

  • Broad claims targeting chemical structure and therapeutic use underpin the patent’s strength, yet narrow dependent claims limit overlap.
  • Strategic patent filing across jurisdictions enhances global protection, with potential extensions through orphan drug or patent term adjustments.
  • Active litigation or disputes appear minimal but should be monitored; challenges to claim validity could jeopardize exclusivity.
  • Competitor mapping shows existing overlapping patents, emphasizing the importance of thorough freedom-to-operate analyses.
  • Continuous innovation and filing of continuation applications can extend market exclusivity and safeguard against current and future competitive threats.

FAQs

Q1: What is the primary chemical class covered by U.S. Patent 8,912,187?
A: It pertains to a specific chemical scaffold with defined substituents, designed for targeted therapeutic applications, likely belonging to a class of kinase inhibitors or similar small molecules, based on the patent’s structural claims.

Q2: How do the claims impact generic drug development?
A: The broad compound and method claims restrict competitors from developing and manufacturing similar molecules or using similar treatment protocols during the patent’s active period, delaying generic entry.

Q3: Can the patent be challenged successfully?
A: Challenges are possible through patent validity proceedings like inter partes reviews (IPRs), especially if prior art predates the invention or if the claims are overly broad or ambiguous.

Q4: What strategic considerations should patent holders adopt post-grant?
A: Maintaining patent robustness involves continuous monitoring of the patent landscape, pursuing related continuation or divisional applications, and ensuring compliance with legal requirements to prevent invalidation.

Q5: Are there opportunities for licensing or collaboration stemming from this patent?
A: Yes, given its therapeutic relevance, licensing negotiations or partnerships could extend market reach, provided the patent’s scope aligns with commercial interests.


References

  1. United States Patent and Trademark Office – Patent full-text and prosecution history.
  2. Patent Family Reports – Global Patent Database.
  3. Legal status databases – Monitoring enforcement and litigation activities.
  4. Industry analyses – Market reports on therapeutic areas related to the patent.
  5. Scientific publications – Prior art references cited during prosecution.

[Note: Specific citation details would depend on actual patent prosecution history and related documents.]

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Drugs Protected by US Patent 8,912,187

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

Foreign Priority and PCT Information for Patent: 8,912,187

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
United Kingdom0305681.9Mar 12, 2003

International Family Members for US Patent 8,912,187

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1633724 ⤷  Get Started Free C300726 Netherlands ⤷  Get Started Free
European Patent Office 1633724 ⤷  Get Started Free CR 2015 00012 Denmark ⤷  Get Started Free
European Patent Office 1633724 ⤷  Get Started Free C20150012 00136 Estonia ⤷  Get Started Free
European Patent Office 1633724 ⤷  Get Started Free 92680 Luxembourg ⤷  Get Started Free
European Patent Office 1633724 ⤷  Get Started Free PA2015016 Lithuania ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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