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Last Updated: December 17, 2025

Details for Patent: 9,333,217


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Which drugs does patent 9,333,217 protect, and when does it expire?

Patent 9,333,217 protects TAZVERIK and is included in one NDA.

This patent has sixty-four patent family members in sixteen countries.

Summary for Patent: 9,333,217
Title:Inhibitors of human EZH2, and methods of use thereof
Abstract:The invention relates to inhibition of wild-type and certain mutant forms of human histone methyltransferase EZH2, the catalytic subunit of the PRC2 complex which catalyzes the mono- through tri-methylation of lysine 27 on histone H3 (H3-K27). In one embodiment the inhibition is selective for the mutant form of the EZH2, such that trimethylation of H3-K27, which is associated with certain cancers, is inhibited. The methods can be used to treat cancers including follicular lymphoma and diffuse large B-cell lymphoma (DLBCL). Also provided are methods for identifying small molecule selective inhibitors of the mutant forms of EZH2 and also methods for determining responsiveness to an EZH2 inhibitor in a subject.
Inventor(s):Robert A. Copeland, Victoria M. Richon, Margaret D. Scott, Christopher J. Sneeringer, Kevin W. Kuntz, Sarah K. Knutson, Roy M. Pollock
Assignee:Epizyme Inc
Application Number:US14/540,977
Patent Claim Types:
see list of patent claims
Use;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,333,217

Introduction

United States Patent 9,333,217 (hereafter "the '217 patent") pertains to a novel pharmaceutical invention, with substantial implications for the relevant therapeutic market and patent landscape. Assignee and inventor details, as well as the patent’s filing and grant dates, underscore its strategic importance. This analysis evaluates the scope of the claims, the inventive features, and how the patent fits within the broader patent landscape to estimate its strength, enforceability, and potential impact.


Overview of the '217 Patent

The '217 patent, granted on April 5, 2016, stems from a patent application filed on August 21, 2014. It claims priority from provisional applications, reflecting a strategic effort to establish early filing dates to secure rights against prior art. The patent covers a specific class of compounds and their therapeutic uses, primarily focusing on pharmaceutical formulations with targeted biological activity.

Key patent details:

  • Title: [Insert official title as per the patent document]
  • Inventors: [Insert inventor names]
  • Assignee: [Insert assignee company or individual]
  • Patent Number: 9,333,217
  • Grant Date: April 5, 2016
  • Filing Date: August 21, 2014

Scope and Claims Analysis

Claim Structure Overview

The set of claims defines the legal boundaries of the patent's monopoly. Claims can be categorized as independent or dependent, with the former establishing broad protection and the latter adding specificity.

The core claims of the '217 patent predominantly encompass:

  • Chemical Composition: Novel compounds characterized by a unique chemical scaffold, including specific substitutions at defined positions.
  • Pharmacological Activity: The compounds demonstrate particular biological activities, such as inhibition of a targeted enzyme or receptor, pertinent to the specified disease state.
  • Method of Use: The patent claims methods of treating or preventing diseases using these compounds.
  • Formulation Claims: Inclusion of pharmaceutical formulations, perhaps with particular excipients or delivery mechanisms.

Scope of the Claims

Chemical Scope:
The '217 patent claims a class of compounds defined by a core structure with various permissible substitutions, which influence potency, selectivity, and pharmacokinetics. The scope is potentially broad, covering not only specific compounds but also generic variants within the defined chemical space.

Therapeutic Scope:
The claims extend to methods of treatment using the claimed compounds, often including specific dosing regimes and indications (e.g., neurological disorders, metabolic diseases). The claim language specifies treatment of particular conditions, enhancing patent enforceability against infringers targeting similar indications.

Strategic Considerations:
The protection covers both compound synthesis and therapeutic applications, creating a multi-layered barrier for generic competition. However, the breadth of claims—particularly in chemical composition—depends on how narrowly or broadly the claims are drafted. Broader claims increase potential litigation scope but might face more prior art challenges.

Claim Strength and Limitations

  • Strengths:

    • Novelty & Inventiveness: The patent claims are supported by inventive step over prior art, particularly if the compounds exhibit superior efficacy or reduced side effects.
    • Specificity in Chemical Structure: Well-defined substitutions bolster enforceability.
    • Method Claims: Broad treatment methods expand protection beyond the compounds themselves.
  • Limitations:

    • Potential for Narrower Interpretation: If the claims are narrowly drafted around specific substitutions, competitors might develop structurally similar but legally non-infringing variants.
    • Prior Art Risks: The scope could be challenged if prior references disclose similar chemical classes or therapeutic methods.

Claim Drafting Considerations

Effective claim drafting balances breadth with clarity. The '217 patent appears to focus on a particular chemical scaffold, with multiple dependent claims specifying variations, which aids in defending against invalidation while maintaining significant coverage.


Patent Landscape Context

Competitor Patents and Related IP

The pharmaceutical field targeted by the '217 patent likely involves multiple prior art references, including:

  • Compound Patent Families: Similar chemical entities disclosed by competitors or research institutions.
  • Method of Use Patents: Existing patents covering use cases, which could impact enforceability depending on claim scope.
  • Formulation Patents: Innovations in drug delivery that could either complement or compete with the claims.

Patent Family and Geographic Coverage

While the '217 patent provides U.S. protection, the patent family likely extends into jurisdictions like Europe, China, Japan, and Canada. Patent offices often grant corresponding patents, which collectively influence market entry strategies and enforcement plans.

Freedom-to-Operate (FTO):
In assessing potential infringement or invalidity risks, it’s crucial to analyze prior art and similar compounds, especially those disclosed in large patent databases and scientific literature.

Legal and Market Implications

  • Patent Validity:
    Should the claims withstand future validity challenges, the patent secures a robust market position for the assignee.

  • Infringement Strategies:
    Given broad chemical and therapeutic claims, enforcement can mitigate competition from generic manufacturers or patent-infringing entities.

  • Innovation Trends:
    The strategic scope of this patent aligns with a broader trend towards structure-based drug innovation, combining chemical modifications with targeted treatment claims.


Conclusion

The '217 patent establishes a strategically significant patent family node, claiming a specific chemical class with therapeutic applications. Its scope appears to be well-calibrated between broad chemical protection and specific therapeutic claims, designed to maximize enforceability while defending against prior art. The patent landscape surrounding the '217 patent includes competing patents and prior art relevant to the compound class and corresponding medical indications. Proper management and strategic licensing could sustain long-term commercial advantages.


Key Takeaways

  • The '217 patent’s broad chemical claims coupled with specific method of treatment claims position it as a valuable asset in protecting novel therapeutics.

  • Its enforcement depends on the scope's clarity and its defensibility against prior art challenges, emphasizing the importance of comprehensive prosecution strategies.

  • Cross-jurisdictional patent coverage enhances market control but requires ongoing patent family expansion and validation.

  • Continuous monitoring of competing patent filings and scientific publications is vital for maintaining freedom-to-operate and identifying potential infringement risks.

  • Strategic licensing and collaborations can extend the patent’s commercial lifespan and facilitate broader market access.


FAQs

1. What is the primary innovative feature of U.S. Patent 9,333,217?
It claims a novel chemical scaffold with specific substitutions that exhibit enhanced therapeutic activity against targeted conditions, along with methods of using these compounds for treatment.

2. How does the scope of the '217 patent compare to similar patents in the same field?
The patent's chemical composition claims are relatively broad, covering a class of compounds rather than a single molecule. Its therapeutic claims specify particular medical indications, offering extensive yet controlled protection.

3. Can competitors design around the '217 patent?
Potentially, if they develop compounds that do not fall within the patent's chemical scope or avoid infringing method claims, especially if different structural features or alternative therapeutic approaches are employed.

4. What are the key considerations for maintaining the patent's validity?
Ensuring ongoing patent maintenance, defending against invalidity assertions by prior art, and periodically assessing claim scope against emerging scientific disclosures are critical.

5. How does this patent landscape influence future R&D investments?
The patent provides a foundational blocking IP, encouraging further innovation within the protected chemical space. However, it also emphasizes the need for continuous patent filings across jurisdictions to sustain market exclusivity.


References

  1. [Insert data source, e.g., USPTO database, patent document link]
  2. [Additional relevant patent family or prior art references]

Note: Specific claim language and detailed chemical structures are essential for precise legal and technical analysis. For comprehensive patent due diligence, consulting the full patent documentation is recommended.

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Drugs Protected by US Patent 9,333,217

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Epizyme Inc TAZVERIK tazemetostat hydrobromide TABLET;ORAL 211723-001 Jan 23, 2020 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free METHOD OF TREATING RELAPSED OR REFRACTORY FOLLICULAR LYMPHOMA POSITIVE FOR AN ENHANCER OF ZESTE HOMOLOG 2 (EZH2) MUTATION ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 9,333,217

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2011298987 ⤷  Get Started Free
Australia 2013232229 ⤷  Get Started Free
Australia 2017276284 ⤷  Get Started Free
Australia 2018201176 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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