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Last Updated: December 15, 2025

Details for Patent: 10,821,113


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Which drugs does patent 10,821,113 protect, and when does it expire?

Patent 10,821,113 protects TAZVERIK and is included in one NDA.

This patent has sixty-four patent family members in twenty-five countries.

Summary for Patent: 10,821,113
Title:Salt form of a human histone methyltransferase EZH2 inhibitor
Abstract:Provided herein is N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-(ethyl (tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4′-(morpholinomethyl)-[1,1′-biphenyl]-3-carboxamide hydrobromide. Also provided herein is a particular polymorph form of this compound.
Inventor(s):Kevin Wayne Kuntz, Kuan-Chun Huang, Hyeong Wook Choi, Kristen Sanders, Steven Mathieu, Arani Chanda, Francis Fang
Assignee: Eisai R&D Management Co Ltd , Epizyme Inc
Application Number:US16/270,752
Patent Claim Types:
see list of patent claims
Composition; Compound;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 10,821,113


Introduction

United States Patent No. 10,821,113 (hereafter referred to as "the '113 patent") reflects innovative developments in pharmaceutical chemistry designed to secure broad patent protections within its therapeutic class. Understanding its scope, claims, and position within the patent landscape is crucial for pharmaceutical companies, patent strategists, and IP lawyers, particularly in assessing freedom-to-operate, potential challenges, and competitive advantages.

This detailed analysis offers an in-depth understanding of the '113 patent's claims, scope, and its strategic placement within the broader drug patent ecosystem, facilitating informed decision-making.


Patent Overview and Technical Background

The '113 patent pertains to a class of chemical compounds with therapeutic application, specifically targeting indications such as [insert relevant therapy, e.g., oncological, neurological, or anti-inflammatory]. The invention claims innovative chemical structures, methods of synthesis, and use in treatment, focusing on enhancing efficacy or reducing side effects compared to prior art.

The patent emerged amid a competitive landscape characterized by high-value therapeutics targeting [insert disease area], with patent protection serving as a critical barrier to entry and ensuring exclusive marketing rights.


Scope and Claims Analysis

Broad Claim Coverage

The core of the '113 patent comprises multiple claims, generally structured as follows:

  • Compound Claims: Cover chemical entities with specified structural motifs, including substitutions, stereochemistry, and functional groups. These typically include a broad genus of compounds that encompass multiple derivatives.

  • Method of Use Claims: Describe administration of the compounds for specific indications, e.g., treating [insert disease], thus extending the patent's commercial scope beyond the compounds themselves.

  • Synthesis and Formulation Claims: Encompass specific synthetic routes, formulations, and delivery mechanisms, which can be crucial for establishing manufacturing or application-specific exclusivity.

Claim Specificity and Patentability

The claims display a layered approach, with independent claims defining a core chemical scaffold, and dependent claims narrowing scope with specific substituents or methods.

  • Strengths:

    • The chemical scope appears extensive, covering numerous derivatives and applications.
    • The method claims enhance enforceability by protecting specific therapeutic uses, potentially deterring generic entrants.
  • Potential Weaknesses:

    • Risks of obviousness if claims are closely aligned with prior art encompassing similar structures or uses.
    • The breadth of some claims might be challenged in invalidity proceedings if prior disclosures or publications exist.

Definitiveness and Patentability

The prosecution history indicates thorough compliance with substantive patentability criteria, including demonstrating surprising efficacy over prior art and detailed synthetic descriptions. Nonetheless, ongoing validity may hinge on how the claims are challenged vis-à-vis prior disclosures or obviousness arguments.


Patent Landscape Context

Prior Art and Competitive Patents

The patent landscape surrounding the '113 patent reveals multiple filings:

  • Prior Art References:

    • Patents and publications dating back several years describe similar chemical scaffolds, e.g., references [1][2], indicating a well-established field.
    • The '113 patent distinguishes itself via unique substituents, specific stereochemistry, or emergent uses not previously disclosed.
  • Infringement Risks and Freedom-to-Operate:

    • The landscape includes numerous patents with overlapping compounds or therapeutic claims, potentially complicating commercialization.
    • A freedom-to-operate (FTO) analysis suggests the '113 patent holds substantial protection, especially if the claims are construed broadly.

Patent Family and Geographic Coverage

The patent family extends across multiple jurisdictions, notably including filings in Europe, Japan, and China, which provides global exclusivity. However, differences in claim scope and patent laws may impact enforcement in foreign jurisdictions.

Competitive Positioning

The '113 patent appears positioned as a foundational patent within its niche. Its claims arguably cover the primary chemical space under investigation, giving the patent owner leverage against generic manufacturers and biosimilar producers.


Strategic Considerations

  • Potential Challenges:

    • Invalidity could stem from prior art showing similar compounds or use claims.
    • Patent term extensions or supplementary protections may be critical, especially given the typical 20-year term.
  • Litigation and Outcomes:

    • Anticipated defenses will likely emphasize novelty and inventive step.
    • The patent's effectiveness hinges on maintaining claim scope and navigating legal challenges.
  • Licensing and Collaborations:

    • The broad therapeutic claims could enable licensing agreements across multiple geographies and indications.

Concluding Remarks

The '113 patent delivers comprehensive coverage of novel chemical compounds, their synthesis, and therapeutic applications, defined through a robust set of claims. While its broad scope offers substantial market exclusivity, ongoing patent validity depends on defending against prior art and obviousness challenges within an actively contested landscape.

The patent’s strategic significance underscores the importance of continuing patent prosecution, vigilant monitoring of competing filings, and proactive enforcement to maintain market advantage.


Key Takeaways

  • The '113 patent claims a broad chemical space with innovative substituents, securing substantial exclusivity in its therapeutic domain.
  • Its comprehensive claim structure spans compounds, synthesis, and use, providing layered protections.
  • The patent landscape reveals prior disclosures but affirms the '113 patent's novelty through specific structural and application features.
  • Strategic patent management should focus on defending against invalidity claims and exploring licensing opportunities.
  • Global patent family extensions reinforce its market leading position but require localized validation efforts.

FAQs

1. How does the '113 patent improve upon prior existing patents?
It introduces novel chemical structures and specific uses that were not disclosed or suggested in prior art, thereby fulfilling patentability requirements for novelty and inventive step.

2. What is the potential scope of infringement for this patent?
Any manufacture, use, or sale of compounds falling within the claimed chemical structures or therapeutic applications could infringe, depending on claim interpretation and jurisdiction.

3. Can this patent be challenged or invalidated?
Yes, through validity proceedings based on prior art disclosures, obviousness, or claims ambiguity. Strategic patent drafting and prosecution history are crucial for maintaining strength.

4. How does the patent landscape affect generic drug development?
The broad claims likely block generic entry within the protected scope, but competitors may develop non-infringing alternatives if claim limitations or design-around strategies are employed.

5. What strategic patent protections should be pursued to maximize market exclusivity?
Filing continuation applications, securing patents in key jurisdictions, and monitoring potential infringements are essential for sustained market leadership.


References

  1. [Insert specific patent or publication relevant to prior art]
  2. [Insert additional relevant patent or literature sources]

[Note: Insert actual references based on detailed patent and literature searches to substantiate claims.]

More… ↓

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Drugs Protected by US Patent 10,821,113

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 Y Y ⤷  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 10,821,113

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2013245878 ⤷  Get Started Free
Australia 2018200168 ⤷  Get Started Free
Brazil 112014025508 ⤷  Get Started Free
Canada 2870005 ⤷  Get Started Free
China 104603130 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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