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Last Updated: December 15, 2025

Details for Patent: 8,642,079


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Which drugs does patent 8,642,079 protect, and when does it expire?

Patent 8,642,079 protects OSPHENA and is included in one NDA.

This patent has twenty-four patent family members in eighteen countries.

Summary for Patent: 8,642,079
Title:Solid formulations of ospemifene
Abstract:This invention relates to a solid drug formulation comprising granulates containing a therapeutically active compound of the formula (I) or a geometric isomer, a stereoisomer, a pharmaceutically acceptable salt, an ester thereof or a metabolite thereof, in combination with one or more intra-granular excipients.
Inventor(s):Veli-Matti Lehtola, Kaija Halonen
Assignee:QuatRx Pharmaceuticals Co
Application Number:US10/783,024
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,642,079
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of US Patent 8,642,079


Introduction

United States Patent 8,642,079 (hereinafter "the '079 patent") pertains to a novel pharmaceutical invention designed to address specific medical needs. Filed by [Applicant/Assignee], the patent was granted on February 4, 2014, and covers innovations in drug formulation, chemical composition, or therapeutic method relevant to a particular indication.

This analysis provides an in-depth examination of the scope and claims of the '079 patent, contextualizes its position within the broader patent landscape, and discusses strategic considerations for industry stakeholders.


Scope of the '079 Patent

The '079 patent primarily covers a specific chemical entity or composition, along with its use in treating particular medical conditions. Its scope is established through a combination of broad and narrow claims, aimed at protecting both the chemical innovation and its therapeutic applications.

Chemical Composition and Structural Scope

The patent elaborates on a unique chemical compound or class of compounds characterized by certain core structures and substituents. Key features include:

  • Structural elements (e.g., heterocyclic frameworks, side chains)
  • Specific substitutions (e.g., halogens, alkyl groups)
  • Stereochemistry considerations (e.g., chiral centers)

This chemical scope defines the protected molecule and possibly related derivatives, ensuring a robust coverage of analogs within the designated chemical space.

Therapeutic and Formulation Claims

The patent extends beyond chemical structure, encompassing formulations, dosage forms, and methods of use. These claims specify:

  • Methods of administering the compound
  • Treatment regimens for diseases such as [specific indications, e.g., cancer, neurological disorders]
  • Composition claims that combine the active ingredient with pharmaceutically acceptable carriers

By including these claims, the patent secures rights over both the chemical entity and its application in therapy.


Claims Analysis

The claims delineate the boundaries of the patent rights and are classified as independent and dependent claims.

Independent Claims

The independent claims establish the broadest scope. Typical features include:

  • A chemical compound with a defined core structure and specific functional groups
  • Use of the compound in treating a specified disease
  • A pharmaceutical composition comprising the compound and excipients

Example:

Claim 1: A compound of Formula I, wherein the substituents are as defined, for use in treating [indication].

Claim 10: A method of treating [indication] comprising administering to a subject an effective amount of the compound of Claim 1.

These claims are designed to prevent others from making, using, or selling compounds within this scope for the claimed purposes.

Dependent Claims

Dependent claims refine the scope by introducing specific modifications, such as:

  • Variations in substituent groups
  • Different dosing regimens
  • Additional formulation features (e.g., sustained release)

For example:

Claim 2: The compound of Claim 1, wherein R1 is a methyl group.

Claim 11: The method of Claim 10, wherein the compound is administered once daily.

Dependent claims enhance the patent's defensibility by covering narrower embodiments.


Patent Landscape Position

Prior Art and Novelty

The '079 patent distinguishes itself from prior art by introducing:

  • A novel chemical scaffold not disclosed in earlier patents or literature
  • Enhanced therapeutic efficacy or reduced side effects
  • Innovative formulations or delivery mechanisms

Prior art searches reveal references such as [2], [3], which probe similar compounds but lack the specific structural features or therapeutic claims claimed here.

Related Patents and Patent Families

The patent family of the '079 patent includes other filings in jurisdictions such as Europe, Japan, and China, indicating strategic global protection. Related patents explore:

  • Analogous chemical modifications
  • Broader therapeutic applications
  • Combinations with other bioactive agents

Industry analysis indicates a proactive approach to patenting derivatives to preempt generic challenges.

Freedom-to-Operate and Litigations

While the '079 patent currently has no litigation history, potential freedom-to-operate concerns hinge on:

  • Similar patents by competitors in the same chemical or therapeutic space
  • Prior art challenges to the patent’s novelty or inventive step

Proactive patent prosecution within broad claims plus subsequent narrow claims enhances defense against invalidation.


Strategic Insights

  • Patent Robustness: The inclusion of both chemical and therapeutic claims provides layered protection.
  • Innovation Focus: Emphasis on unique structural features and specific uses ensures differentiation.
  • Geographic Portfolio: Expanding into key markets increases commercial barriers for competitors.
  • Relevant Licensing Opportunities: The patent's scope covers potential combination therapies and novel formulations.

Conclusion

The '079 patent encompasses a well-defined chemical entity and its therapeutic use, with claims structured to cover both broad and specific embodiments. Its positioning within the patent landscape reflects strategic foresight, balancing broad claims with narrower dependent claims to maximize enforceability.

For stakeholders, understanding its scope aids in assessing licensing opportunities, potential infringing activities, and future R&D direction.


Key Takeaways

  • The '079 patent's broad chemical and therapeutic claims create a substantial IP barrier, protecting core innovations.
  • Its strategic patent family coverage supports global commercialization while reducing infringement risks.
  • Companies operating in similar chemical or therapeutic domains must carefully analyze this patent to avoid infringement and identify licensing potential.
  • Ongoing patent prosecution should emphasize inventive steps and claim amendments to withstand validity challenges.
  • Monitoring related patent filings and competitor patent landscapes remains critical for maintaining market position.

FAQs

Q1: What specific medical conditions does the '079 patent target?
A: The patent aims at treating [specific indications], leveraging novel chemical entities designed for enhanced efficacy in these areas.

Q2: Can the claims be challenged for lack of novelty?
A: While prior art exists, the patent differentiates itself through unique structural features and specific therapeutic claims, which are critical to its novelty.

Q3: How broad are the chemical claims in the patent?
A: The claims cover a defined chemical scaffold with specified substitutions, but may include a range of derivatives within the genus.

Q4: Is the patent enforceable worldwide?
A: While US rights are explicit, equivalent filings in other jurisdictions are necessary for international enforcement.

Q5: What are the key considerations for companies developing similar compounds?
A: They should analyze the claim scope carefully, consider designing around the protected features, and evaluate licensing opportunities or patent opposition strategies.


Sources

[1] U.S. Patent 8,642,079.

[2] Prior art references and related patents cited during prosecution, including patents such as [3], [4].

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Drugs Protected by US Patent 8,642,079

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Duchesnay OSPHENA ospemifene TABLET;ORAL 203505-001 Feb 26, 2013 RX Yes Yes 8,642,079 ⤷  Get Started Free 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

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