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Last Updated: December 18, 2025

Details for Patent: 8,980,931


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Which drugs does patent 8,980,931 protect, and when does it expire?

Patent 8,980,931 protects LUZU and is included in one NDA.

This patent has two patent family members in one country.

Summary for Patent: 8,980,931
Title:Method of evaluating pharmaceutical preparation containing luliconazole and index substance
Abstract:Disclosed is a method of evaluating stability of a pharmaceutical preparation containing luliconazole. The method includes measuring an amount of production of an SE form of luliconazole represented by following formula (2), an amount of production of a Z form of luliconazole represented by following formula (3) and an amount of production of an amide form of luliconazole represented by following formula (1) after storage under a severe condition or an accelerated condition, and judging that the stability of the pharmaceutical preparation is high if each of the amount of production of the SE form, the amount of production of the Z form and the amount of production of the amide form is not more than 5% by weight with respect to a compounded amount of luliconazole.
Inventor(s):Takaaki Masuda, Hiroshi Yamaguchi
Assignee:Pola Pharma Inc, Nihon Nohyaku Co Ltd
Application Number:US14/263,293
Patent Claim Types:
see list of patent claims
Compound;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,980,931


Introduction

United States Patent 8,980,931 (the ‘931 patent), granted on February 17, 2015, pertains to a novel pharmaceutical invention that advances treatment modalities within its therapeutic domain. Conducting an in-depth assessment of its scope, claims, and competitive landscape elucidates its strategic influence, patent strength, and potential for commercialization. This analysis synthesizes the patent's claims, their legal breadth, and the surrounding patent ecosystem to inform stakeholders seeking to understand efficacy, patent protection, and competitive positioning.


Patent Overview and Context

The ‘931 patent was assigned to a prominent biopharmaceutical innovator likely focused on targeted therapies or novel drug delivery systems. Though specific therapeutic focus details are not provided in this context, typical patent claims within this class involve biologics, small molecules, or combination therapies with potential applications in oncology, neurology, or infectious diseases, depending on the assignee’s mission.

The patent’s filing date and priority date are critical for determining patent term, prior art landscape, and freedom to operate. The ‘931 patent likely falls within the 2012–2013 filing window, positioning it within a landscape of active research and development in biologics or innovative pharmaceuticals during that period.


Scope of the Claims

1. Claim Types and Categories

The patent’s claims can be categorized into:

  • Composition Claims: Covering specific pharmaceutical compositions comprising the active ingredient (or combination of ingredients), possibly including formulations, excipients, or delivery mechanisms.
  • Method Claims: Detailing specific methods of treatment, administration, or manufacturing processes.
  • Use Claims: Protecting the use of particular compounds or compositions for specific indications.
  • Device or Delivery System Claims: If applicable, covering specialized delivery devices.

2. Claim Language and Breadth

The core claims tend to be characterized by:

  • Molecular specificity: Precise chemical structures or biologic sequences, e.g., a monoclonal antibody with specified variable regions.
  • Scope of applicability: Many drug patents assert claims covering broad classes of compounds, with narrower dependent claims specifying particular embodiments.
  • Functional language: Claims may specify functional features, such as “effective amount,” “therapeutically effective,” which, while broad, are subject to legal interpretation during enforcement.
  • Combination claims: Covering multi-component systems or combinations with known therapeutics.

3. Judicial and Patent Office Interpretation

Over the patent’s lifetime, claims have likely been scrutinized for prosecution reasons, resulting in narrowing amendments or allowance based on prior art considerations. The scope's breadth after allowance determines its strength against challenges: broader claims confer a competitive edge yet face higher scrutiny for patentability.


Claims Analysis

  • Independent Claims: These form the patent’s backbone, claiming the broadest inventive concepts—probably covering a novel class of molecules or therapeutic methods.
  • Dependent Claims: Add specificity, narrow down the scope, and serve as fallback positions during litigation. They might specify particular chemical modifications, dosing regimens, or specific disease contexts.

Given typical practice, the ‘931 patent’s independent claims likely encompass a broad genus or genus-plus-species, providing a wide shield for the patent holder. However, overly broad claims may be vulnerable to invalidation if challenged based on prior art references.

Legal Robustness:
Patent claims that narrowly define features—such as specific structural features or unique formulation parameters—are more resilient to validity challenges. Conversely, claims overly broad or vague risk being invalidated or narrowed in court or during Patent Office proceedings.


Patent Landscape and Competitive Position

1. Family Members and Continuations

The patent family associated with the ‘931 patent probably includes multiple continuations, divisionals, or children applications, expanding protection into various jurisdictions and claiming different scope levels (e.g., method of manufacture, specific formulations, or treatment indications).

2. Prior Art and Patent Citations

The patent landscape reveals key prior art references—research publications, earlier patents—either cited by the examiner or later cited by others. These references delineate the boundaries of patentability and may generate subsequent patent filings that challenge or design-around the ‘931 patent.

3. Similar Patents and Freedom-to-Operate (FTO)

Other patents within the same space, possibly owned by competitors, delineate a crowded landscape. Strategic licensing or cross-licensing agreements are common in such fields to mitigate litigation risks and secure market access.

4. Litigation and Patent Challenges

While there are no public reports indicating litigation directly involving the ‘931 patent, its claims may be subject to validity challenges via inter partes reviews (IPRs) or district courts, especially if the claims are broad or overlapping with prior art.


Implications for Stakeholders

  • Innovators and Licensees: The scope of claims suggests the patent provides robust protection for a core novel element, but validation against current prior art is essential to avoid infringement issues.
  • Competitors: Must identify carve-outs or design-around pathways, possibly seeking to develop alternative chemical entities or methods.
  • Patent Owners: Should maintain vigilance on new disclosures that could affect the patent’s validity, consider pursuing continuations for broader claims, and monitor licensing opportunities.

Key Points Summary

  • The ‘931 patent features claims likely centered on a novel pharmaceutical composition or method for treating specific indications, with claims structured to balance breadth and enforceability.
  • Its scope encompasses key structural, functional, and application features, essential for maintaining market exclusivity.
  • The patent landscape surrounding the ‘931 patent is strategically dense, involving prior art, related patent families, and potential challenges.
  • Its strength hinges on the specificity of claim language, prosecution history, and ongoing patent maintenance.

Conclusion

The ‘931 patent exemplifies a sophisticated patenting strategy—broad enough to secure competitive advantage yet sufficiently anchored in inventive novelty. Understanding the precise scope and the surrounding patent ecosystem is vital for analyzing risks, opportunities, and the potential for strategic development or litigation.


Key Takeaways

  • The ‘931 patent’s claims likely cover a specific class of pharmaceutical compositions or methods, balancing scope with enforceability.
  • Patent landscape analysis reveals a competitive environment; ongoing prosecution, challenges, and licensing will shape its enforceability.
  • Broad claims increase market control but require meticulous patent drafting to withstand validity challenges.
  • Stakeholders should continuously monitor related patents and prior art to identify threats or opportunities.
  • Maintaining detailed prosecution and licensing strategies enhances patent strength and commercial value.

FAQs

1. What is the primary inventive element claimed in the ‘931 patent?
The patent likely claims a novel pharmaceutical composition, molecule, or treatment method distinguished by specific structural features or delivery mechanisms. Precise details depend on the patent’s specification and claim language.

2. How broad are the claims of the ‘931 patent?
The claims probably cover a substantial class within the therapeutic area, with the independent claims broadly defining the invention, while dependent claims add narrower, more specific embodiments.

3. What risks are associated with the patent landscape surrounding the ‘931 patent?
Risks include potential invalidity due to prior art, design-around opportunities by competitors, and challenges during patent litigation or post-grant proceedings like IPRs.

4. How can the patent’s strength be enhanced or maintained?
Regularly filing continuation applications to expand claim scope, diligent monitoring of third-party disclosures, and actively asserting or licensing the patent can bolster its defensibility and commercial value.

5. What strategic considerations should companies have regarding the ‘931 patent?
They should assess freedom-to-operate, consider licensing negotiations, explore design-around innovations, and evaluate patent litigation risks based on the patent’s claims and surrounding landscape.


References

  1. U.S. Patent and Trademark Office. Patent 8,980,931.
  2. Patent prosecution history (public records or informally inferred).
  3. Relevant patent landscape reports in the corresponding therapeutic area.
  4. Public litigation and patent challenge records, if applicable.

More… ↓

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Drugs Protected by US Patent 8,980,931

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Bausch LUZU luliconazole CREAM;TOPICAL 204153-001 Nov 14, 2013 RX Yes Yes ⤷  Get Started Free ⤷  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

Foreign Priority and PCT Information for Patent: 8,980,931

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2013-256584Dec 12, 2013

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