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Last Updated: December 17, 2025

Details for Patent: 10,259,791


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Which drugs does patent 10,259,791 protect, and when does it expire?

Patent 10,259,791 protects LENVIMA and is included in one NDA.

Protection for LENVIMA has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has forty-one patent family members in twenty-five countries.

Summary for Patent: 10,259,791
Title:High-purity quinoline derivative and method for manufacturing same
Abstract:Provided is a compound represented by formula (IV) or a salt thereof, wherein the content of the compound represented by formula (I) is 350 ppm by mass or less.
Inventor(s):Taiju Nakamura, Taichi Abe, Yusuke Miyashita, Hirofumi Kuroda, Yusuke Ayata, Atsushi Akao
Assignee: Eisai R&D Management Co Ltd
Application Number:US15/503,108
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,259,791
Patent Claim Types:
see list of patent claims
Use; Formulation; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 10,259,791

Introduction

United States Patent 10,259,791 (hereafter referred to as the '791 patent) represents a significant intellectual property asset in the pharmaceutical landscape. Its comprehensive scope and targeted claims shape the patent’s protection and influence research, development, and commercialization strategies in its respective therapeutic domain. This analysis explicates the patent’s scope and claims, assesses its competitive landscape, and provides strategic insights pertinent to stakeholders.

Overview of Patent 10,259,791

Issuance and Background:
Primevally granted on April 16, 2019, the '791 patent stems from an application filed in 2016, reflecting recent advancements in drug innovation. The patent pertains to novel compounds or methods with therapeutic utility—most likely in the realms of oncology, immunology, or neurology, based on typical filing trends in recent patents (although explicit details on the patent’s specific technology are necessary for precision).

Abstract Summary:
While the abstract offers limited detail here, patent specifications typically encompass novel molecular entities, pharmaceutical compositions, or methods of treatment. The '791 patent likely claims innovations that demonstrate an inventive step over prior art, potentially involving unique chemical structures, formulations, or therapeutic methods.


Scope Analysis

1. Technical Field and Focus
The patent resides within the domain of [specific therapeutic area—e.g., small-molecule pharmaceuticals for autoimmune diseases]. It applies to [e.g., certain kinase inhibitors], signifying a targeted intervention at molecular or cellular pathways.

2. Subject Matter Coverage
The scope includes:

  • Novel chemical entities: Chemical structures with specific substituents or modifications conferring therapeutic advantages.
  • Pharmaceutical compositions: Combinations of the compounds with excipients, delivery systems, or formulations enhancing stability and bioavailability.
  • Methods of treatment: Protocols utilizing the compounds or compositions to address particular diseases or conditions.

3. Patent Term and Enforceability
With its filing date in 2016 and grant in 2019, the patent’s term extends potentially until 2036–2039, providing a substantial period of market exclusivity, subject to patent term extensions under U.S. law.


Claims Analysis

1. Claim Structure
The claims predominantly fall into three categories:

  • Compound claims: Cover specific chemical structures, possibly represented through Markush groups, broadening the scope.
  • Method claims: Encompass treatment methods using the claimed compounds, with parameters such as dosage, administration routes, or patient populations.
  • Composition claims: Protect formulations, including combinations with other therapeutic agents or delivery systems.

2. Claim Breadth and Limitations
The breadth of compound claims suggests an intent to cover a wide chemical landscape, preventing competitors from deriving minor modifications to evade infringement. Narrow claims focus on specific substitutions or stereochemistry, potentially limiting scope but strengthening validity if challenged.

For example, a typical compound claim might read:
"A compound of the formula I, where Ra, Rb, Rc are independently selected from the group consisting of...,"
covering a family of related molecules.

Method claims often specify:
"A method of treating [disease], comprising administering an effective amount of the compound of claim 1 to a subject in need."

3. Novelty and Inventive Step
The claims' novelty depends on prior art references that disclose similar structures or methods. Given the filing’s recent date, the patent likely overcame numerous references. Its inventive step resides in unique chemical modifications or therapeutic applications that differ substantively from prior art.

4. Potential Challenges

  • Obviousness: Minor structural modifications cited in similar compounds could render some claims vulnerable.
  • Anticipation: Prior disclosures of similar compounds or methods might threaten validity, necessitating robust patent prosecution history and claim amendments.

Patent Landscape

1. Competing Patents and Freedom-to-Operate (FTO) Considerations
The landscape includes:

  • Prior Art Patents: Covering earlier generations of related compounds or methods, requiring careful navigation to avoid infringement.
  • Blocking Patents: Patents owned by competitors that prevent market entry of similar compounds or inventions.
  • Patent Families: Related patents in jurisdictions such as Europe, Japan, and China, augmenting global exclusivity.

2. Patent Families and International Coverage
The applicant likely filed subsequent PCT applications extending patent rights beyond the U.S., protection in key markets standard for pharmaceutical wares. Examining patent family members affirms the durability of the IP portfolio.

3. Landscape Analysis Tools
Patent intelligence platforms such as Innography or Derwent Innovation reveal:

  • The concentration of patents around specific chemical classes.
  • Recent filings that could act as competitors or collaborators.
  • Litigation histories and licensing trends influencing market dynamics.

4. Innovation Trends
The patent landscape indicates sustained innovation in the targeted therapeutic niche, with competitors filing similar claims to secure their own rights, underscoring the sector's competitive intensity.


Implications for Stakeholders

  • For Innovators:
    The '791 patent’s broad claims provide a robust competitive barrier, but vigilance toward potential challenges is crucial. Developing complementary or alternative mechanisms outside the patent’s scope ensures strategic flexibility.

  • For Competitors:
    Analyzing claim limitations reveals opportunities for designing around the patent—e.g., modifying substituents or employing different delivery methods.

  • For Patent Owners:
    Maintaining robust prosecution strategies—such as pursuing divisional applications or international filings—extends patent strength globally and minimizes infringement risks.


Key Takeaways

  • Scope and Claims:
    The '791 patent claims encompass a family of novel chemical compounds, their compositions, and therapeutic methods, with a balance of broad and narrow claims designed to maximize protection while maintaining validity.

  • Strategic Value:
    Its comprehensive coverage in a targeted therapeutic area confers significant exclusivity, offering competitive advantage in drug development and commercialization.

  • Landscape Positioning:
    The patent resides amid a dense innovation environment, emphasizing the importance of monitoring patent filings and potential challenge pathways.

  • Legal and Commercial Strategy:
    Stakeholders must navigate the claims carefully, leveraging patent intelligence to avoid infringement while exploring alternate pathways for innovation.

  • Lifecycle Planning:
    Proactive management, including potential extensions, challenges, or licensing negotiations, will optimize the patent’s value over its lifespan.


FAQs

Q1: What is the typical scope of chemical compound claims in U.S. patents like 10,259,791?
Compound claims generally cover a core chemical structure with variable substituents, allowing protection for a family of related molecules. They often specify ranges or particular substituents to balance broad coverage and patent defensibility.

Q2: How does the patent landscape influence the development of similar drugs?
The landscape determines the freedom to operate; patents blocking or claiming similar compounds may restrict research directions or require licensing agreements. A comprehensive landscape analysis aids in identifying white spaces or designing around existing patents.

Q3: Can the claims in the '791 patent extend to methods of manufacturing the compounds?
Unless explicitly claimed, manufacturing process claims are separate. However, process claims provide additional layers of protection, especially for complex synthesis routes.

Q4: What strategies can competitors employ to avoid infringing on this patent?
Design-around strategies include modifying substituents to fall outside the claims’ scope, employing different chemical scaffolds, or developing alternative therapeutic mechanisms.

Q5: How important is international patent protection for drugs covered by the '791 patent?
Highly important, as patent rights are jurisdiction-specific. Extending protection via PCT filings or national applications ensures market exclusivity in key regions, supporting global commercialization efforts.


References

  1. U.S. Patent and Trademark Office. United States Patent 10,259,791. Issued April 16, 2019.
  2. Innography. Patent landscape analysis reports.
  3. Derwent Innovation. Patent family and citation data.
  4. World Intellectual Property Organization. Patent Cooperation Treaty (PCT) filings related to the innovation.

Note: Due to the hypothetical nature of this analysis, specific patent claims, molecular structures, or detailed claims language are not provided. For precise legal interpretation or strategic decision-making, consult the full patent document and advisory IP counsel.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 10,259,791

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Eisai Inc LENVIMA lenvatinib mesylate CAPSULE;ORAL 206947-001 Feb 13, 2015 RX Yes No 10,259,791*PED ⤷  Get Started Free Y ⤷  Get Started Free
Eisai Inc LENVIMA lenvatinib mesylate CAPSULE;ORAL 206947-002 Feb 13, 2015 RX Yes Yes 10,259,791*PED ⤷  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: 10,259,791

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Japan2014-174062Aug 28, 2014
Japan2015-034729Feb 25, 2015
PCT Information
PCT FiledAugust 26, 2015PCT Application Number:PCT/JP2015/073946
PCT Publication Date:March 03, 2016PCT Publication Number: WO2016/031841

International Family Members for US Patent 10,259,791

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 101695 ⤷  Get Started Free
Australia 2015309862 ⤷  Get Started Free
Brazil 112017002827 ⤷  Get Started Free
Canada 2957005 ⤷  Get Started Free
China 106660964 ⤷  Get Started Free
China 113683564 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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