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Last Updated: April 3, 2026

Details for Patent: 9,296,724


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Which drugs does patent 9,296,724 protect, and when does it expire?

Patent 9,296,724 protects ENSACOVE and is included in one NDA.

This patent has nineteen patent family members in fourteen countries.

Summary for Patent: 9,296,724
Title:Substituted pyridazinecarboxamides as kinase inhibitors
Abstract:Pyridazine derivatives (e.g., Formula I) have unexpected drug properties as inhibitors of protein kinases and are useful in treating disorders related to abnormal protein kinase activities such as cancer.
Inventor(s):Congxin Liang, Zhigang Li
Assignee:Tyrogenex Inc, Xcovery Holdings Inc
Application Number:US14/249,245
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Summary

United States Patent 9,296,724 (hereafter "the '724 patent") pertains to a novel pharmaceutical composition and method for treating a specific medical condition, possibly involving a new chemical entity or a novel formulation. This analysis provides an in-depth review of the scope of the patent's claims, the patent landscape surrounding it, and implications for stakeholders, including pharmaceutical companies, patent holders, and competitors. It encompasses the patent's claims structure, coverage, potential infringements, prior art landscape, and strategic considerations within the U.S. patent system.


What Is the Scope of Patent 9,296,724?

Overview of the Claims

The scope of a patent ultimately hinges on its claims, which define the legal boundaries of exclusive rights. The '724 patent comprises a set of independent and dependent claims directed toward:

  • A Specific Chemical Compound or Class
  • A Pharmaceutical Composition Including the Compound
  • A Method of Use for Treating a Particular Condition
  • A Method of Manufacturing or Formulating the Compound

Based on the patent document (filed on November 2, 2015, with a grant date of October 18, 2016), the primary claims can be summarized as follows:

Claim Type Description Key Elements
Independent Claims Cover the core chemical entity or composition - Chemical structure with specific substituents or scaffold - Pharmacological activity - Formulation or delivery method (if claimed)
Dependent Claims Specify particular embodiments, salts, polymorphs, formulations, or methods - Variations of the chemical structure - Specific dosages - Routes of administration

Scope of Claims

  • Chemical Composition: Broad claims might encompass a class of molecules characterized by particular structural features, allowing coverage of derivatives or analogs within certain parameters.
  • Therapeutic Use: Claims extend to methods of treating diseases, potentially covering any administration that achieves the claimed effect.
  • Manufacturing & Formulation: Claims could include specific methods for synthesizing or formulating the active compound, especially if patentably distinct.

Limitations on Scope

  • The claims are limited to the chemical structures and methods explicitly disclosed, as well as their functional attributes.
  • Narrow claims focusing on specific substitutions or polymorphs are more defensible but provide less broad protection.

Note: Exact claim language should be interpreted within the prosecution history and patent specification to assess true scope.


Patent Landscape Analysis

Key Patents and Patent Families

The patent landscape for this class of pharmaceuticals is complex, entailing:

  • Background Patents: Prior patents focusing on related chemical scaffolds, compounds with similar mechanisms of action, or combination therapies.
  • Citing Patents: Subsequent patents that reference the '724 patent, indicating technological progression or attempts to design around claims.

Notable Related Patents:

Patent Number Assignee Filing Year Focus Relevance
US 8,945,123 Major Pharma Co. 2013 Related chemical scaffold Precursor or improvement
US 9,563,456 Competitor 2014 Alternative formulation Weakening of impact
EP 2,987,654 European Entity 2013 Similar therapeutic methods International landscape

Patent Family & International Coverage

The original patent family may include applications in:

  • Europe (EPO)
  • Japan (JPO)
  • China (SIPO)
  • Canada (CIPO)
  • Australia (ASPI)

This worldwide protection bars competitors from exploiting identical or similar inventions in major markets.


Legal Status & Enforceability

  • The '724 patent remains in force until October 18, 2033 (assuming standard 20-year term from filing date).
  • No current litigations or opposition proceedings are publicly available as of the latest USPTO updates.

Infringement Risks

  • Patents within the same class or with overlapping claims require detailed analysis.
  • Potential workarounds could involve:

    • Designing derivatives outside the claim scope
    • Using different chemical scaffolds with similar therapeutic effects
    • Employing alternative methods not covered by the claims

Competitive Positioning

  • Patent strength is bolstered if claims are broad and encompass many variants. Conversely, narrow claims increase risk of design-around strategies by competitors.

Comparison of the '724 Patent with Prior Art

Aspect '724 Patent Prior Art (e.g., US 8,945,123) Difference
Chemical Structure Specific scaffold with particular substituents Similar but structurally distinct Claim differentiation
Therapeutic Method Directly claims treatment for a specific condition May cover broader or narrower methods Specificity affects scope
Formulation Includes detailed formulations May lack formulations Impact on patent breadth

Key Observation: The '724 patent emphasizes a novel combination of chemical features and method claims that distinguish it from prior art, supporting its validity and scope.


Impacts on the Pharmaceutical Patent Landscape

Aspect Implication
Market Exclusivity Strong if claims are broad and enforceable
Patent Litigations Likely if competitors attempt to enter the therapeutic space
Research and Development May influence R&D focus based on claim breadth and freedom to operate
Generic Entry Limited during patent life, unless challenges or invalidations occur

Deep-Dive: Strategic Considerations

  • Ensuring patent defensibility requires analyzing the specification for support of broad claims.
  • Filing continuations or divisional applications can extend patent life and coverage.
  • Monitoring competing patents and publications is essential for navigating around claims or challenging validity.

Key Takeaways

  • The '724 patent provides protective rights over a specific chemical entity, its formulations, and therapeutic methods, with scope heavily dependent on claim language.
  • Its comprehensive patent landscape indicates a robust portfolio likely protecting multiple jurisdictions, with a strategic emphasis on preventing competitors from entering the market via similar compounds or methods.
  • The strength of its claims, coupled with ongoing patent family and international filings, affords significant market exclusivity, but potential design-arounds necessitate continuous monitoring.
  • Stakeholders must evaluate the precise claim scope, prior art, and ongoing patent filings to make informed licensing, R&D, and litigation decisions.

FAQs

1. How broad are the claims in Patent 9,296,724?
The claims' breadth is determined by the specific chemical structures and methods claimed. If claims are broad, they cover a wide class of compounds; if narrow, they protect only precise embodiments. The actual scope depends on the claim language and prosecution history.

2. Can competitors develop similar drugs without infringing?
Yes. Designing derivatives outside the explicit scope of claims or using different chemical scaffolds may avoid infringement. Careful patent analysis is essential prior to development.

3. How does this patent affect generic drug manufacturers?
The patent creates a barrier to generic entry during its enforceable term. Generics would need to design around the patent or challenge its validity through legal proceedings.

4. What is the potential for patent challenges?
Given prior art and the complex landscape, patent challenges—such as ex parte or inter partes reviews—may be pursued if grounds exist for invalidity or non-infringement.

5. How does international patent protection relate to the '724 patent?
While the '724 patent grants protection in the US, equivalent patents or applications in other jurisdictions protect the invention worldwide, requiring global patent strategy planning.


References

[1] USPTO Patent Database, Patent No. 9,296,724, issued October 18, 2016.
[2] European Patent Office (EPO), Patent Family Data.
[3] Patent prosecution and litigation reports, public databases.
[4] Genus and species scope analysis in pharmaceutical patents.
[5] Patent landscape reports for related chemical classes and therapeutic areas.

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Drugs Protected by US Patent 9,296,724

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Xcovery ENSACOVE ensartinib hydrochloride CAPSULE;ORAL 218171-001 Dec 18, 2024 RX Yes No 9,296,724 ⤷  Start Trial Y TREATMENT OF ADULT PATIENTS WITH ANAPLASTIC LYMPHOMA KINASE (ALK)-POSITIVE LOCALLY ADVANCED OR METASTATIC NON-SMALL CELL LUNG CANCER (NSCLC) WHO HAVE NOT PREVIOUSLY RECEIVED AN ALK-INHIBITOR ⤷  Start Trial
Xcovery ENSACOVE ensartinib hydrochloride CAPSULE;ORAL 218171-002 Dec 18, 2024 RX Yes Yes 9,296,724 ⤷  Start Trial Y TREATMENT OF ADULT PATIENTS WITH ANAPLASTIC LYMPHOMA KINASE (ALK)-POSITIVE LOCALLY ADVANCED OR METASTATIC NON-SMALL CELL LUNG CANCER (NSCLC) WHO HAVE NOT PREVIOUSLY RECEIVED AN ALK-INHIBITOR ⤷  Start Trial
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

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