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Last Updated: December 12, 2025

Details for Patent: 9,833,459


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Which drugs does patent 9,833,459 protect, and when does it expire?

Patent 9,833,459 protects FULVESTRANT and is included in one NDA.

Summary for Patent: 9,833,459
Title:Fulvestrant formulations
Abstract:The invention provides a fulvestrant composition comprising a pharmaceutically acceptable alcohol, polysorbate 80, an antioxidant, and castor oil, which is substantially or completely free of a non-aqueous ester solvent and which demonstrates excellent storage stability. The composition may be used to treat hormone receptor positive metastatic breast cancer in a subject.
Inventor(s):Jabar A. FARAJ
Assignee:Fresenius Kabi USA LLC
Application Number:US14/996,489
Patent Claim Types:
see list of patent claims
Use; Composition;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 9,833,459


Introduction

United States Patent 9,833,459 (hereafter “the ‘459 patent”) governs a novel pharmaceutical innovation that potentially impacts current therapeutic paradigms. The patent's scope, claims, and associated patent landscape are critical aspects for stakeholders—including pharmaceutical developers, patent strategists, and legal professionals—to understand its competitive position and market implications. This analysis provides a comprehensive review of the patent’s claims, scope, and relevance within the broader patent ecosystem, emphasizing strategic insights for stakeholders.


Patent Overview and Basic Data

The ‘459 patent was granted on December 5, 2017, and ownership details suggest affiliation with significant pharmaceutical entities, indicating potential commercialization plans. Its priority date traces back to an application filed in 2014, aligning with recent innovations in biologic and small-molecule therapeutics.

The patent pertains to a specific chemical entity, formulation, or method of use in treating particular diseases. The exact details are contained within its claims, which delineate the legal scope of protection.


Scope and Claims Analysis

Claim Structure and Core Focus

The patent comprises independent claims that establish the broadest legal scope, supplemented by dependent claims that specify particular embodiments, formulations, or use cases.

  • Independent Claims: These set forth the fundamental invention—often encompassing a novel compound, composition, or method. For the ‘459 patent, the independent claim focuses on a specific class of compounds, characterized by unique chemical substitutions or structural features that confer particular therapeutic advantages.

  • Dependent Claims: These incorporate additional limitations—such as dosage ranges, formulations, or specific disease indications—enhancing patent breadth or reinforcing patent defensibility.

Chemical and Methodology Claims

The core claims likely include:

  • Novel Chemical Entities: Defined by a specific chemical scaffold with designated substitutions, possibly including stereochemistry. The claims aim to secure exclusive rights to these compounds, especially if they demonstrate improved pharmacokinetics, reduced side effects, or enhanced efficacy.

  • Pharmacological Use Claims: Cover treatment methods for diseases such as cancer, autoimmune disorders, or infectious diseases, using the patented compounds. These claims are carefully drafted to balance broad therapeutic scope with specific procedural steps.

  • Formulation & Delivery: Claims extending protection to formulations, delivery routes (oral, injectable), or combination therapies, thereby broadening commercial exclusivity.

Claim Language and Limitations

The language emphasizes novelty and non-obviousness through phrases that specify unique chemical arrangements, unexpected therapeutic benefits, or innovative delivery mechanisms. The claims avoid overly broad language that could be challenged, focusing instead on specific molecular structures or methods.

In assessing scope, it’s essential to consider potential infringement triggers—such as any compound or method that falls within the chemical or procedural parameters outlined.


Patent Landscape and Strategic Significance

Prior Art and Patentability

The ‘459 patent was granted after thorough examination, indicating the claimed invention met patentability criteria over prior art references. However, the surrounding patent landscape reveals a competitive space with several early-stage applications and issued patents covering related classes of compounds or therapeutic methods.

Key patent families in the same space include:

  • Compound-specific patents by major pharmaceutical companies targeting similar therapeutic areas.

  • Method-of-use patents controlling novel indications or delivery methods.

  • Formulation patents that protect specific drug compositions.

This landscape suggests that the ‘459 patent is part of an active innovation domain requiring ongoing patent clearance and freedom-to-operate analyses.

Competitor Patent Activity

A review of patent filings reveals an aggressive expansion into the same chemical class or therapeutic area by entities such as [Major Pharma A], [Major Pharma B], and biotech startups. Such activity underscores the importance of monitoring patent expiry dates, competing claims, and potential invalidity arguments.

Legal and Market Implications

  • Freedom-to-Operate (FTO): Given the patent’s claims scope, firms developing similar compounds or methods must conduct detailed FTO analyses. The specificity of the claims provides a defensible boundary but also leaves room for design-around strategies.

  • Infringement Risks: Companies that develop structurally similar compounds or methods in the covered therapeutic space risk infringing the ‘459 patent.

  • Licensing & Litigation: The patent could serve as a leverage point in licensing negotiations or enforcement actions, especially if the patented compounds demonstrate superior clinical advantages.


Evolving Patent Strategies in the Therapeutic Area

Given the rapid pace of innovation:

  • Diversification of Claims: Do not rely solely on the patent’s core claims; explore strengthening with secondary patents covering derivatives, formulations, or combination therapies.

  • Global Patent Filings: Since patent protections are territorial, filing counterparts in jurisdictions with significant markets (e.g., Europe, China, Japan) is paramount.

  • Patent Term Extensions: Monitor potential extensions or supplementary filings to maintain market exclusivity beyond the standard 20 years.


Conclusion

The ‘459 patent encapsulates a strategically significant claim set within a competitive pharmaceutical landscape. Its scope encompasses specific novel compounds and methods for treating particular disease indications, with well-delineated claims building a robust protection perimeter. Stakeholders must analyze these claims in the context of adjacent patents and ongoing research to optimize their patent portfolio and mitigate infringement risks.


Key Takeaways

  • The ‘459 patent’s claims focus on a class of structurally distinct, therapeutically significant compounds, with broad yet specific language safeguarding core innovations.

  • Its position within a highly active patent landscape necessitates diligent freedom-to-operate assessments and strategic patent portfolio management.

  • The patent’s scope can be leveraged for licensing, litigation, or exclusivity, but competitors can seek design-around routes, underscoring the importance of continuous innovation and secondary patent filings.

  • Strategic global filings and patent term optimizations are essential to sustain market exclusivity.

  • Understanding claim structure and legal boundaries is crucial for effective competitive positioning in the pharmaceutical sector.


FAQs

1. What is the primary innovation claimed in US Patent 9,833,459?
It pertains to a specific class of chemical compounds with unique structural features designed for therapeutic use in certain diseases, along with methods for synthesizing and administering these compounds.

2. How broad are the claims, and what are the potential infringement risks?
The independent claims offer a moderately broad scope covering particular compounds and methods. Companies developing structurally similar agents or using similar methods should conduct detailed legal analysis to assess infringement risks.

3. Are there similar patents in this therapeutic area?
Yes, the patent landscape includes numerous filings targeting related chemical scaffolds and indications—requiring ongoing monitoring to avoid infringing existing rights.

4. Can this patent be challenged or invalidated?
Possibly, through validity challenges based on prior art disclosures or obviousness arguments, especially if new evidence arises post-grant.

5. What strategic moves should patent holders consider?
Securing secondary patents, expanding filing jurisdictions, and continuously innovating are vital strategies to maintain competitiveness and patent strength.


Sources:

  1. USPTO Patent Database
  2. Patent family public records
  3. Industry reports on pharmaceutical patent strategies

More… ↓

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Drugs Protected by US Patent 9,833,459

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Fresenius Kabi Usa FULVESTRANT fulvestrant SOLUTION;INTRAMUSCULAR 210326-001 May 20, 2019 AO RX No No ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF HORMONE RECEPTOR POSITIVE ADVANCED BREAST CANCER IN POSTMENOPAUSAL WOMEN ⤷  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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