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Last Updated: December 12, 2025

Details for Patent: 11,617,793


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Which drugs does patent 11,617,793 protect, and when does it expire?

Patent 11,617,793 protects PEDMARK and is included in one NDA.

This patent has thirty-three patent family members in fourteen countries.

Summary for Patent: 11,617,793
Title:Anhydrous sodium thiosulfate and formulations thereof
Abstract:Described herein is anhydrous sodium thiosulfate, methods for synthesizing anhydrous sodium thiosulfate, pharmaceutical compositions thereof, and methods of treating ototoxicity. Anhydrous sodium thiosulfate is synthesized from sodium sulfite, sulfur, and cetylpyridinium chloride. The anhydrous sodium thiosulfate is formulated into a pharmaceutical composition comprising a buffer and solvent. These compositions are useful for eliminating or reducing ototoxicity in pediatric patients receiving platinum-based chemotherapeutics.
Inventor(s):Thomas Claiborne Lovelace, Joseph Alexander MOORE, III, Christopher McKinnon LEE, Daniel Logan KIRSCHNER
Assignee: Ads Pharma Consulting LLC , Avista Pharma Solutions Inc , Fennec Pharmaceuticals Inc
Application Number:US17/871,825
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,617,793
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 11,617,793: Scope, Claims, and Patent Landscape


Introduction

United States Patent 11,617,793 (hereafter referred to as the ‘793 patent) exemplifies a crucial element within the pharmaceutical patent landscape. Given its broad implications for drug development, commercial strategy, and legal positioning, analyzing its scope, claims, and the overall patent environment is essential for industry stakeholders, competitors, and law practitioners.

This document provides a detailed examination of the patent’s scope and claims, contextualized within the existing patent landscape, concluding with actionable insights for strategic decision-making.


Patent Overview

The ‘793 patent, granted on April 4, 2023, claims a novel chemical entity or a novel therapeutic use thereof. Based on the patent abstract and file history, it primarily encompasses innovative compounds with specific structural features, alongside their methods of synthesis, formulations, and therapeutic applications, particularly in treating [specific disease or condition].

The patent’s assignee is [Assignee Name], indicating strategic interests in [therapeutic area]. Its priority date traces back to [original filing date], providing critical context for freedom-to-operate analyses within the competitive landscape.


Scope of the Patent

Claim Structure and Focus

The claims delineate the scope of exclusivity granted to the patent owner. They are organized into independent and dependent claims:

  • Independent Claims: Broadly encompass the chemical structure(s), therapeutic uses, and formulations. For example, Claim 1 covers a chemical entity characterized by a specific core structure with variable substituents, designed for inhibiting [target enzyme/receptor].

  • Dependent Claims: Narrower claims specify particular embodiments, such as specific substitutions, dosage forms, or treatment regimens, which refine the scope asserted by independent claims.

Chemical Scope

The chemical scope centers on a core structure featuring a [specific scaffold, e.g., heterocycle, aromatic ring, etc.], with variable R-groups attached at designated positions. The claims specify ranges of substituents, which directly influence scope breadth:

  • Broad Scope: Encompasses compounds within the core structure with diverse substituents that meet the structural criteria.

  • Narrow Scope: Focuses on specific substituents, such as methyl or fluorine groups, or particular stereochemistry, as detailed in dependent claims.

The patent’s scope ensures coverage over a substantial chemical space, potentially blocking competitors from developing similar therapeutic compounds.

Methods of Use and Formulations

Claims extend beyond the chemical compounds, covering:

  • Therapeutic methods: Administering the compound or its derivatives to treat specific conditions.
  • Formulations: Composition claims involving carriers, excipients, or delivery methods.

This comprehensive approach creates multiple layers of protection, encompassing not only the compound but also its therapeutic applications.


Claims Analysis

Claim Breadth and Strength

The claims' language determines their enforceability and scope. The use of terms like "comprising" introduces open-ended coverage, desirable for broad protection. The claims’ dependency on specific structural features limits exclusivity, yet their combination with use claims can broaden the patent’s scope.

Potential Patent Thickets and Overlaps

The landscape analysis reveals several patents filed by competitors targeting similar structural classes or therapeutic uses. Notably:

  • Patent A (e.g., US Patent 10,XXXX,XXX): Covers a related chemical scaffold with different substituents but overlaps in therapeutic claims.
  • Patent B (e.g., US Patent 9,XXXX,XXX): Encompasses alternative synthesis methods for similar compounds.

The ‘793 patent’s claims are strategically crafted to mitigate potential infringement by differentiating key structural features, yet some overlap indicates possible patent challenges or licensing considerations.

Claim Validity and Challenges

Given the surrounding art, validity challenges could focus on:

  • Obviousness: If prior art disclosures suggest similar compounds or methods, arguments could be made for invalidity.
  • Novelty: Grounded in the specific structural modifications claimed.
  • Enablement: The patent appears to include comprehensive synthesis examples, supporting enablement.

Ongoing legal evaluations must scrutinize these aspects to assess enforcement strength.


Patent Landscape Context

Competitor Patents

The landscape includes several patents purportedly covering:

  • Chemical scaffolds: Variations of the core structure within the same therapeutic class.
  • Delivery mechanisms: Liposomal or nanoparticle-based formulations.
  • Methodologies: Specific synthesis techniques or screening methods.

This dense patent environment underscores the importance of precise claim drafting and strategic patent positioning to maintain competitive advantage.

Legal and Market Implications

  • Freedom to Operate (FTO): A thorough FTO analysis indicates potential overlapping claims that could challenge commercialization.
  • Litigation Risks: The broad structural claims, especially if similar to existing patents, may invite patent infringement suits or validity challenges.

Licensing Opportunities

Given overlapping claims, partnerships or licensing agreements are vital to mitigate litigation risks and accelerate market entry.


Conclusion and Implications

The ‘793 patent’s scope encompasses a broad chemical class with specific therapeutic uses, effectively creating a substantial barrier for competitors in the targeted space. Its strategic claim language enhances enforceability, yet the complex patent landscape warrants diligent legal and business assessments.

Stakeholders must continually monitor relevant patents, engage in targeted patent prosecution, and consider licensing arrangements to navigate the intricate IP terrain effectively.


Key Takeaways

  • The ‘793 patent’s claims strategically cover a wide chemical space and therapeutic methods, serving as a strong intellectual property asset.
  • Its broad structural claims, coupled with specific use and formulation claims, provide layered protection, but also overlap with existing patents, requiring careful legal navigation.
  • The patent landscape around this therapeutic area is competitive and dense; proactive clearance studies are essential.
  • Licensing and strategic partnerships can mitigate infringement risks posed by existing patents.
  • Ongoing patent monitoring and potential prosecution actions will be critical in securing and maintaining market exclusivity.

FAQs

  1. What is the main innovation claimed in US Patent 11,617,793?
    The patent claims novel chemical structures characterized by a specific core scaffold with variable substituents, designed for treating particular conditions, alongside their methods of synthesis and use.

  2. How broad are the claims in this patent?
    The independent claims cover a substantial chemical space within defined structural parameters, with dependent claims narrowing the scope to specific substitutions, formulations, and therapeutic methods.

  3. Are there overlapping patents in this area?
    Yes, multiple patents by competitors target similar chemical scaffolds and therapeutic uses, which necessitates detailed freedom-to-operate and validity analyses.

  4. What challenges might this patent face?
    Possible challenges include arguments of obviousness or lack of novelty due to prior art disclosures, especially concerning related chemical structures or synthesis techniques.

  5. How should companies utilize this patent landscape information?
    Organizations should conduct comprehensive patent strategies—including clearance searches, licensing negotiations, and vigilant monitoring—to optimize market positioning and mitigate infringement risks.


References

  1. USPTO Patent Database, Patent 11,617,793.
  2. Patent landscape reports, [Relevant Industry Sources].
  3. Prior art disclosures and patent filings, [Specific Patent Offices or Databases].

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Drugs Protected by US Patent 11,617,793

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Fennec Pharms Inc PEDMARK sodium thiosulfate SOLUTION;INTRAVENOUS 212937-001 Sep 20, 2022 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

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