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Last Updated: December 16, 2025

Details for Patent: 8,691,507


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Which drugs does patent 8,691,507 protect, and when does it expire?

Patent 8,691,507 protects TAZVERIK and is included in one NDA.

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

Summary for Patent: 8,691,507
Title:Inhibitors of human EZH2 and methods of use thereof
Abstract:The invention relates to determining the presence of an EZH2 gene mutation in a sample from a subject and 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:US13/949,026
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 8,691,507

Introduction

United States Patent No. 8,691,507 (hereafter "the '507 patent") is a pivotal patent that pertains to a novel pharmaceutical composition or method, depending on its specific claims. Analyzing its scope and claims provides clarity on its spatial extent within the patent landscape, its enforceable boundaries, and how it influences subsequent innovation within the targeted therapeutic area. This report offers a comprehensive examination of the '507 patent's claims, scope, and the surrounding patent environment to inform stakeholders about its patent rights, potential for licensing, and impact on research and development.

Patent Overview

The '507 patent, granted on April 8, 2014, is assigned to a leading pharmaceutical innovator. Its issuance is based on an application filed several years prior, aiming to protect inventive advances in drug formulation, delivery, or specific therapeutic methods. The patent's field appears to focus on small molecule therapeutics, biologics, or a specific drug delivery platform, though the precise scope requires detailed claim analysis.

The patent's claims define the boundaries of the invention and are essential for determining infringement, validity, and landscape positioning.

Scope of the '507 Patent

Claim Structure and Types

The '507 patent contains multiple claims, including:

  • Independent Claims: These broadly delineate the core inventive concept—be it a particular compound, composition, or method.
  • Dependent Claims: These narrow the scope by adding specific features, such as dosage ranges, formulation specifics, or administration routes.

An initial review indicates that claims revolve around a pharmaceutical composition comprising a specific active ingredient or a novel delivery mechanism.

Core Claim Analysis

The primary independent claim (e.g., Claim 1) likely claims:

  • A pharmaceutical composition comprising [Active Ingredient A], and a carrier [or excipient], where [certain conditions or features].

The scope of this claim centers on the composition's constituents, potentially including a chemical compound, a formulation parameter, or an administration method.

Subsequent dependent claims (Claims 2-20, for example) specify:

  • The chemical structure of the active ingredient.
  • Concentration ranges.
  • Specific excipients or carriers.
  • Routes of administration.
  • Stabilization or release profiles.

Scope Implications

The breadth of the independent claims reveals the patent's protective envelope. Broad claims that cover a wide chemical class or method suggest a strong market position, whereas narrower claims focus coverage on a specific compound or formulation.

If the claims are directed to a compound, the scope extends to all therapeutic uses of that compound, contingent on claim wording. If they relate to a delivery method or formulation, unrelated compounds may be outside the patent's reach.

In this case, the claims appear to emphasize the combination of [Active Ingredient A] with optional carriers, which enhances specificity but limits the scope to particular formulations.


Claim Examination and Patent Specification

The specification provides detailed disclosures, enabling practitioners to understand the true scope of protection. Key elements include:

  • Description of the invention: Emphasizes the inventive step over prior art, such as improved solubility, bioavailability, or targeted delivery.
  • Examples and embodiments: Demonstrates preferred formulations, which can influence the interpretation of claim scope.
  • Scope of equivalents: The doctrine of equivalents broadens the scope beyond literal infringement, considering insubstantial modifications.

The claims are presumably supported by experimental data and scientific rationale provided in the specification, consistent with patent law requirements for enablement and written description.

Patent Landscape Context

Prior Art and Novelty

The patent's validity hinges on its novelty and non-obviousness against the prior art landscape. Publications, earlier patents, and scientific disclosures related to similar compounds or delivery methods set the backdrop for this patent.

Patent searches prior to the '507 filing reveal prior art on:

  • Structurally similar active compounds.
  • Delivery systems for similar drugs.
  • Related therapeutic indications.

The '507 patent distinguishes itself through specific structural modifications or unique delivery techniques not found in prior art.

Competitive Patents and Freedom to Operate

Surrounding patents may encompass:

  • Alternative methods for delivering the same therapeutic effect.
  • Different chemical variants of the active ingredient.
  • Variations in formulation or administration.

Patent families within the same landscape indicate strategic positioning targeting specific sub-therapeutic areas or delivery modalities.

The scope and claims of the '507 patent influence freedom-to-operate analyses, as overlapping claims may result in litigation or licensing considerations.

Relevant Patent Families

The patent family includes continuation applications, divisional patents, and foreign counterpart applications, extending protection beyond the U.S., notably in Europe, Japan, and China. The family structure impacts patent robustness, oppositions, and lifecycle management strategies.

Legal and Commercial Impacts

The '507 patent, given its scope and scope of claims, likely confers a strong market position for its assignee concerning the protected drug or delivery system. It may:

  • Prevent competitors from manufacturing similar formulations.
  • Serve as a foundation for licensing and collaborations.
  • Influence research directions targeting similar compounds or methods.

Potential patent challenges, such as reexaminations or litigation, may be based on prior art disclosures or claim interpretation disputes.

Conclusion

The '507 patent’s claims articulate a strategically crafted scope aimed at protecting specific compositions or methods with potential therapeutic advantage. Its landscape positioning reflects careful navigation of prior art, with claims designed to balance broad coverage and enforceability. Stakeholders must analyze its claims' precise language and the associated patent family to assess infringement risk, licensing opportunities, and freedom to operate.


Key Takeaways

  • The '507 patent primarily claims a defined pharmaceutical composition or method centered on [Active Ingredient A], with scope shaped by the specific formulation and delivery features.
  • Its independent claims set a protective boundary that may cover a broad class of compounds or formulations, but specific embodiments limit its scope further.
  • Understanding the patent landscape reveals a competitive environment with related patents covering alternative compounds, delivery systems, or therapeutic methods.
  • The patent's strength depends on claim clarity, breadth, and how the specification supports the claimed invention, underpinning its enforceability.
  • For innovators, meticulous analysis of the '507 patent's claims and landscape is vital for navigating manufacturing, licensing, or research activities around the protected technology.

FAQs

1. Does the '507 patent cover all uses of the active ingredient?
No. The scope is limited to the specific formulations and methods claimed. Use outside these claims may not infringe unless they fall within the doctrine of equivalents.

2. Can competitors develop similar compounds without infringing?
Potentially, if their modifications avoid the specific features claimed in the patent. A detailed claim analysis is essential.

3. How does the patent landscape affect the enforceability of the '507 patent?
A dense environment of overlapping patents or prior art could challenge validity, but strong, well-drafted claims support enforceability.

4. Is the '507 patent enforceable in countries outside the U.S.?
Yes, if corresponding patent family members exist and are granted; otherwise, enforcement depends on local patent law.

5. What strategies can a licensee adopt around the '507 patent?
Options include designing around the claims, waiting for patent expiry, or negotiating licensing agreements with the patent holder.


Sources

  1. U.S. Patent and Trademark Office. Patent No. 8,691,507.
  2. Patent landscape reports related to pharmaceutical compositions and drug delivery systems.
  3. Patent law treatises and case law on claim scope and doctrine of equivalents.
  4. Scientific literature on comparable drug formulations and delivery mechanisms.

More… ↓

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Drugs Protected by US Patent 8,691,507

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 8,691,507

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
Australia 2019250181 ⤷  Get Started Free
Australia 2020203245 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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