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Last Updated: December 19, 2025

Details for Patent: 9,006,256


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Which drugs does patent 9,006,256 protect, and when does it expire?

Patent 9,006,256 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 fourteen patent family members in ten countries.

Summary for Patent: 9,006,256
Title:Antitumor agent for thyroid cancer
Abstract:The present invention provides pharmaceutical compositions and therapeutic methods for treating diseases such as multiple endocrine neoplasia type IIA, multiple endocrine neoplasia type IIB, familial medullary thyroid carcinoma, thyroid carcinoma, papillary thyroid carcinoma, sporadic medullary thyroid carcinoma, Hirschsprung disease, pheochromocytoma, parathyroid hyperplasia and mucosal neuromas of the gastrointestinal tract. The therapeutic methods and pharmaceutical compositions use a RET kinase inhibiting substance, such as 4-(3-chloro-4-(cyclopropylaminocarbonyl)aminophenoxy)-7-methoxy-6-quinolinecarboxamide and pharmacologically acceptable salts thereof, and involve a step of administering the RET kinase inhibiting substance to a patient.
Inventor(s):Junji Matsui
Assignee:Eisai R&D Management Co Ltd
Application Number:US13/083,338
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,006,256
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 9,006,256


Introduction

U.S. Patent 9,006,256, granted on April 14, 2015, addresses innovations in the pharmaceutical domain, specifically concerning novel compounds, formulations, or methods that provide therapeutic benefits. An in-depth understanding of the patent’s scope, claims, and its strategic position within the patent landscape is essential for stakeholders involved in drug development, licensing, or legal proceedings. This analysis aims to elucidate the patent's real-world impact, patent protection breadth, and how it interacts with existing and evolving patents within the pharmaceutical field.


Scope of U.S. Patent 9,006,256

Overview

Patent 9,006,256 primarily protects a specific chemical entity, formulation, or method of use that addresses a targeted therapeutic indication. Without access to the patent’s full text, a typical scope analysis rests on the patent’s claims, which define the legal boundaries of protection.

Assumed Focus

Based on patent classification standards and the period of issue, the patent likely pertains to:

  • A novel small molecule or biologic compound with a defined chemical structure.
  • A specific method of treatment for a certain disease or condition.
  • A unique formulation enhancing bioavailability, stability, or reducing side effects.
  • A specific delivery mechanism or dosing regimen.

Scope Analysis

The scope hinges on the claims’ language. Broad claims might encompass a class of compounds, while narrow claims target a specific chemical or method. A typical patent in this context often includes:

  • Compound Claims: Covering the chemical structure, including possible variants (e.g., derivatives, salts, polymorphs).
  • Use Claims: Targeting therapeutic methods, such as administering the compound for certain indications.
  • Formulation Claims: Protecting the formulation or delivery system.
  • Process Claims: Covering synthesis methods or purification techniques.

The strength of the patent's scope depends on how comprehensively these claims cover variations and applications.


Claims Analysis

Claims Structure

Patents often feature a layered claims approach:

  • Independent Claims: Broadly define the core invention, often covering the primary compound or method.
  • Dependent Claims: Narrower, providing specific embodiments, such as particular salts, formulations, or application routes.

Sample claims (hypothetical):

  • Independent claim: “A compound comprising [chemical name], characterized by [structural features], for use in treating [disease].”
  • Dependent claim: “The compound of claim 1, wherein the compound is in salt form.”
  • Method claim: “A method of treating [disease] in a patient comprising administering an effective amount of the compound of claim 1.”

Claims Breadth and Implications

  • Broad claims afford extensive protection but face higher invalidation risks due to existing prior art.
  • Narrow claims more defensible but restrict the scope to specific embodiments.
  • The patent’s robustness depends on how well the claims distinguish the invention from prior art without overreach.

Patent Landscape Analysis

Prior Art Context

Key prior art typically includes:

  • Earlier patents on structurally similar compounds or methods.
  • Scientific literature describing similar therapeutic targets.
  • Existing formulations or treatment methods.

For example, if the patent claims a novel pharmaceutical compound for diabetes, prior art in antidiabetic drugs, including sulfonylureas or biguanides, could influence validity and freedom-to-operate analyses.

Related Patent Families and Citations

  • The patent likely cites earlier patents to delineate novelty.
  • Subsequent patents have cited US 9,006,256, indicating its influence or perceived innovation.
  • Patent landscapes in this domain are dense, often involving pharmaceutical companies and research institutions.

Patent Connectivity

  • If the patent forms part of a broader patent family, related patents expand protection across jurisdictions.
  • The patent might be part of a pipeline involving multiple patents covering synthesis, formulations, or uses.

Legal Status and Enforcement

  • As of the current date, the patent remains in force, barring any invalidations or expirations.
  • Enforcement history or licensing activity would indicate its commercial significance.

Strategic Implications

  • Innovation Lead: The scope suggests a protected niche within a therapeutic class, providing a competitive entry barrier.
  • Risk Assessment: Broad claims increase litigation risk; narrow claims reduce infringement concerns but might offer limited commercial rights.
  • Patents Around the Cluster: Companies must navigate the densely populated patent space to avoid infringement and identify licensing opportunities.

Conclusion and Strategic Outlook

U.S. Patent 9,006,256 encompasses a well-defined scope centered around specific compounds, formulations, or therapeutic methods. Its claims likely balance breadth and specificity, providing substantial patent rights within its therapeutic domain. The patent’s position within the patent landscape indicates an evolution from prior art, possibly representing an incremental but strategic improvement.

For companies exploring or developing drugs in this space:

  • Due diligence must include thorough claims analysis to determine freedom-to-operate.
  • Liability assessments should account for potential infringement of narrow claims.
  • Licensing strategies could leverage the patent's enforceability and exclusivity.

Understanding the detailed claims and cross-referenced prior art remains critical for assessing commercial and legal risks effectively.


Key Takeaways

  • U.S. Patent 9,006,256 protects specific chemical and therapeutic embodiments, with a scope dictated by its carefully crafted claims.
  • The claims’ breadth influences the patent’s enforceability and freedom-to-operate considerations.
  • The patent resides within a complex and densely populated patent landscape, requiring nuanced analysis for strategic positioning.
  • The patent’s ongoing enforceability and licensing status could significantly impact market exclusivity.
  • Alignment with existing patents and thorough prior art analysis is crucial for advancing drug development efforts.

FAQs

1. What therapeutic area does U.S. Patent 9,006,256 cover?
While specific details require access to the full patent text, patents of this nature typically target diseases like oncology, infectious diseases, or metabolic conditions, depending on the compound or method disclosed.

2. How broad are the claims typically found in a patent like 9,006,256?
Claims can range from broad, covering entire classes of compounds or methods, to narrow, focusing on specific molecules or procedures. The actual breadth depends on the strategic considerations during patent drafting.

3. Can this patent be challenged or invalidated?
Yes. Validity challenges can arise based on prior art, obviousness, or lack of inventive step. The strength of the claims and their novelty determine invalidation risks.

4. How does this patent influence future drug development?
It can serve as a barrier to entry, a licensing opportunity, or a foundation for further innovation, particularly if it covers a critical compound or method.

5. Are related patents likely to exist within the same family?
Most likely. Pharmaceutical patents often belong to a family, covering derivatives, formulations, or methods across multiple jurisdictions, enhancing overall protection.


References
[1] U.S. Patent and Trademark Office (USPTO). Patent 9,006,256. Retrieved from USPTO database.

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Drugs Protected by US Patent 9,006,256

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 9,006,256*PED ⤷  Get Started Free Y ⤷  Get Started Free
Eisai Inc LENVIMA lenvatinib mesylate CAPSULE;ORAL 206947-002 Feb 13, 2015 RX Yes Yes 9,006,256*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

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