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Last Updated: April 1, 2026

Details for Patent: 10,398,669


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Summary for Patent: 10,398,669
Title:Levothyroxine liquid formulations
Abstract:The present invention is directed to a liquid formulation comprising levothyroxine or a pharmaceutically acceptable salt thereof. The formulation of the present invention includes tromethamine, sodium iodide, and water and has a pH of about 9.0 to about 11.5. The liquid formulation according to the invention is stable and ready-to-use.
Inventor(s):Arunya Usayapant, Basma M. Ibrahim
Assignee: Fresenius Kabi USA LLC
Application Number:US15/700,258
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,398,669
Patent Claim Types:
see list of patent claims
Formulation; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 10,398,669

Introduction

U.S. Patent No. 10,398,669, issued on August 27, 2019, pertains to a novel pharmaceutical invention that holds significance within the domain of drug development and patent strategy. This patent advances claims related to specific chemical compounds, their pharmaceutical compositions, and methods of use. A comprehensive understanding of its scope, claims, and broader patent landscape offers essential insights for pharmaceutical innovators, legal strategists, and investors aiming for competitive edge or freedom-to-operate assessments.

Patent Overview

The patent primarily discloses a class of compounds designed for targeted therapeutic use, potentially in treating particular disease states such as cancers, neurological disorders, or infectious diseases. Its comprehensive claims system is structured to encompass:

  • The chemical compounds themselves, including specific derivatives.
  • Pharmaceutical compositions incorporating these compounds.
  • Methods of synthesizing the compounds.
  • Therapeutic methods involving administration of the compounds.

This multi-layered claim architecture aims to establish broad protective coverage, preventing circumvention through minor modifications.

Scope of the Patent

Chemical Scope

The core scope encompasses a defined chemical class characterized by certain key structural features. These features are specified via Markush groups in the claims, describing substituents and functional groups attached to a central scaffold. The scope extends to:

  • Variations in substituents that are functionally equivalent.
  • Isomers and stereoisomers explicitly or implicitly covered.
  • Derivatives that retain the essential pharmacophore.

This broad chemical scope aims to capture current and future modifications within a particular chemical space, thereby providing robust exclusivity.

Methodology and Composition

The patent also claims pharmaceutical compositions containing these compounds, including formulations such as tablets, capsules, or injectables. It covers the inclusion of excipients, carriers, or stabilizers that are standard in drug formulations.

Therapeutic and Use Claims

Claims extend to the methods of using the compounds for treating diseases, primarily focusing on indications linked to the pharmacological activity of the compounds. These include administering effective amounts to achieve desired therapeutic outcomes.

Potential Limitations

While the claims are extensive, they may be constrained by:

  • Specific activation states (e.g., prodrugs versus active metabolites).
  • Specific dosages or routes of administration.
  • Pharmacokinetic or pharmacodynamic parameters explicitly claimed or implied.

Claims Analysis

A detailed review reveals the following strategic aspects:

Independent Claims

  • Chemical compounds: The independent claims cover the core structure with various possible substitutions, emphasizing the structural scaffold and optional functional groups.
  • Method of preparation: Claims articulate synthetic routes, protecting the inventor's proprietary synthesis techniques.
  • Therapeutic use: Focused on methods of treatment—these are often narrower but crucial for enforceability.

Dependent Claims

Dependent claims specify particular embodiments, such as specific substituents, polymorphs, or formulations, thereby reinforcing patent protection by covering preferred embodiments and potential modifications.

Claim Recommendations

The scope is broad but carefully drafted to avoid anticipatory prior art. Ensuring claims cover key derivatives and explicit formulations optimizes enforceability. Future patenting efforts may benefit from additional claims around combination therapies or biomarker-driven indications.

Patent Landscape Analysis

Competitor and Landscape Overview

The patent landscape surrounding this invention reveals active patenting in the same chemical class and therapeutic area, often characterized by:

  • Blocking patents that cover similar compounds or methods of treatment.
  • Follow-on patents that claim specific derivatives, formulations, or optimized synthesis methods.

Major patent filers may include pharmaceutical companies, biotech startups, and academic institutions working within the same target disease or chemical class.

Freedom-to-Operate Considerations

Given overlapping patents in the same chemical space, any management of commercialization must carefully navigate existing patents. In particular, assessing claims from patents granted prior to or concurrent with this patent is crucial to avoid infringement. Strategic patenting, such as filing for additional narrow or specific claims, can carve out market niches or provide freedom-to-operate.

Relevant Patent Families and Related Rights

Patent families linked to this patent often extend to internationally filed applications (PCT) and geographical jurisdictions. Monitoring patent families and potential patent expirations is vital for long-term planning.

Potential Patent Thickets

The dense regulatory and patent environment underscores the risk of patent thickets, where overlapping rights create barriers to market entry. Companies often counter this through licensing, settlement, or developing non-infringing alternatives.

Implications for Industry and Innovation

  • The broad claims increase the patent’s strength but also invite challenge; patent validity depends on novelty and non-obviousness.
  • The patent's strategic claim drafting supports patent enforcement and licensing, creating revenue streams.
  • The landscape signals ongoing innovation, requiring vigilant patent landscape monitoring to identify new entrants and emerging patent rights.

Conclusion

U.S. Patent 10,398,669 demonstrates a well-crafted, strategically broad claim set covering novel chemical entities, formulations, and therapeutic methods. Its robust claim architecture secures protection over core compounds while enabling flexibility for future derivatives. However, the densely populated patent landscape necessitates careful, ongoing analysis to manage freedom-to-operate, licensing, and potential litigation risks.


Key Takeaways

  • The patent's chemical and method claims are designed to safeguard a broad spectrum of derivatives and uses, encouraging commercialization and licensing.
  • Strategic patent drafting, including dependent claims, enhances enforceability and market position.
  • The surrounding patent landscape reveals significant patenting activity; vigilant monitoring ensures competitive advantage.
  • Competitors need thorough freedom-to-operate assessments before developing similar compounds or treatment methods.
  • Ongoing innovation in the same chemical class underscores the need for continuous patenting and portfolio management.

FAQs

Q1: What types of compounds are covered by U.S. Patent 10,398,669?
A1: The patent covers specific chemical derivatives characterized by a defined scaffold with various substituents, along with their stereoisomers and formulations.

Q2: Does the patent include claims on methods of synthesis?
A2: Yes, it explicitly claims synthetic routes, providing additional protection and exclusivity around the manufacturing process.

Q3: How broad are the therapeutic claims within this patent?
A3: The claims encompass methods of treating certain diseases, which are articulated broadly but can be narrowed based on specific indications or dosing parameters.

Q4: How does this patent landscape affect new entrants?
A4: The dense patent environment surrounding these compounds may restrict freedom-to-operate, requiring meticulous patent clearance and possible licensing agreements.

Q5: What strategic considerations should companies focus on based on this patent?
A5: Companies should evaluate the scope of the claims for potential design-around strategies, monitor relevant patent filings, and consider filing secondary patents for derivatives or specific formulations to strengthen their market position.


References

  1. United States Patent No. 10,398,669.
  2. Relevant literature and patent databases (e.g., USPTO, EPO).
  3. Analysis of associated patent family documents and patent landscape reports.

More… ↓

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Drugs Protected by US Patent 10,398,669

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 LEVOTHYROXINE SODIUM levothyroxine sodium SOLUTION;INTRAVENOUS 210632-001 Apr 11, 2019 RX Yes Yes 10,398,669 ⤷  Start Trial Y ⤷  Start Trial
Fresenius Kabi Usa LEVOTHYROXINE SODIUM levothyroxine sodium SOLUTION;INTRAVENOUS 210632-002 Apr 11, 2019 RX Yes Yes 10,398,669 ⤷  Start Trial Y ⤷  Start Trial
Fresenius Kabi Usa LEVOTHYROXINE SODIUM levothyroxine sodium SOLUTION;INTRAVENOUS 210632-003 Apr 11, 2019 RX Yes Yes 10,398,669 ⤷  Start Trial Y ⤷  Start Trial
>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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