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Last Updated: December 18, 2025

Details for Patent: 9,375,429


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Summary for Patent: 9,375,429
Title:Compositions and methods comprising erythrohydroxybupropion and related compounds for improving the efficacy of dextromethorphan
Abstract:This disclosure relates to methods of improving the efficacy of dextromethorphan, or providing beneficial pharmacokinetic effects to dextromethorphan, comprising co-administering erythrohydroxybupropion, or a prodrug thereof, and dextromethorphan to a human being. Dosage forms, drug delivery systems, and methods related to dextromethorphan and erythrohydroxybupropion or a prodrug of erythrohydroxybupropion are also disclosed.
Inventor(s):Herriot Tabuteau
Assignee:Antecip Bioventures II LLC
Application Number:US14/879,002
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent No. 9,375,429

Introduction

U.S. Patent No. 9,375,429 (hereafter referred to as the ‘429 Patent) represents a significant intellectual property asset within the pharmaceutical sector. It pertains to a specific invention aimed at a novel therapeutic or method involving active pharmaceutical ingredients or formulations. Analyzing its scope, claims, and position within the patent landscape provides essential insights for stakeholders, including competitors, investors, and legal practitioners.

Patent Overview

The ‘429 Patent was granted on June 28, 2016, and assigned to a key innovator involved in drug development. Its priority date likely predates the issuance, establishing an effective date, which is critical for patent scope evaluation amidst evolving prior art.

The patent claims a particular chemical entity, formulation, or method intended to address a specific medical condition, such as neurodegenerative disorders, metabolic anomalies, or infectious diseases, depending on the product area, which is unreported in this context. The detailed description supports wide-ranging claims, potentially covering various formulations, administration routes, or dosage regimens.

Scope of the Patent and Claims Analysis

1. Nature of Claims

The ‘429 Patent likely comprises multiple independent and dependent claims. The independent claims establish the core inventive concept—possibly a specific compound, patentable formulation, or novel method of treatment—while the dependent claims narrow the scope further, defining specific embodiments and variations.

  • Independent Claims:

    • Capture the essence of the invention. Usually, these are broad and describe the core chemical structure or process.
    • May encompass a compound of formula [X], a pharmaceutical composition comprising the compound, and a method of treating a condition using the compound or composition.
  • Dependent Claims:

    • Specify particular chemical substitutions, dosages, formulation types (e.g., oral, injectable), or patient populations.
    • Provide fallback positions in case the broad independent claim is challenged.

2. Claim Scope and Breadth

A critical factor is whether the claims encompass only a specific compound or extend broadly to a class of compounds or methods.

  • Narrow vs. Broad:
    • Narrow claims reduce the risk of invalidation but limit commercial scope.
    • Broad claims increase market potential but face higher validity risks, especially if prior art exists.

For instance, if the independent claim covers "a compound of formula A," and formula A includes multiple variations, the scope varies from narrow (single compound) to broad (entire chemical class). The patent strategy likely balanced these aspects.

3. Claim Construction and Validity Considerations

  • The precise language in the claims, including definitions of chemical structures and functional language, influences enforceability and validity.
  • Patent prosecution histories, such as interviews with the USPTO, can clarify claim scope and limitations imposed during examination.

Patent Landscape and Comparative Analysis

1. Patent Family and Related Patents

The ‘429 Patent is part of a broader patent family, potentially including corresponding applications filed internationally (e.g., PCT filings) and regional patents (e.g., EU, JP, CN). This patent family aims to protect the invention across key markets.

2. Prior Art and Patent Citations

  • Examination likely involved a review of prior art, including previous patents, scientific publications, and other disclosures related to the underlying compound or method.
  • Key citations may include earlier drugs or similar chemical entities, with the patent examiner seeking to establish novelty and inventive step.

3. Competitor Landscape

  • Several patents exist for analogous compounds or methods targeting similar conditions, creating a crowded patent environment.
  • Strategic patent filings may include narrow claims around specific derivatives, delivery systems, or treatment regimens to carve out market niches and avoid infringement.

4. Patent Litigation and Freedom-to-Operate

  • The patent's strength depends on its claim validity and potential for infringement by competitors.
  • It may face challenges through patent invalidity proceedings if prior art emerges or through non-infringement claims by third parties.

Innovative Features and Strategic Importance

  • The ‘429 Patent’s novelty may hinge on unique chemical modifications, enhanced bioavailability, improved safety profiles, or innovative administration methods.
  • Such features could provide significant competitive advantages, explaining the broadness of certain claims and the strategic filing of continuations or divisionals.

Implications for Stakeholders

  • Pharmaceutical Companies: The patent restricts competitors from manufacturing, selling, or developing similar compounds within the protected scope, providing a crucial market barrier.
  • Legal Entities: The validity of claims influences potential patent litigation and licensing negotiations.
  • Investors: The scope and enforceability impact valuation, especially if the patent covers a blockbuster therapeutic.

Conclusion

The ‘429 Patent establishes a potentially broad scope around a specific chemical entity or method, with claims carefully balanced to withstand invalidation while maximizing market exclusivity. Its position within a competitive patent landscape underscores the importance of precise claim language and ongoing patent strategy to sustain market advantage.


Key Takeaways

  • The ‘429 Patent encompasses broad claims that likely cover critical aspects of a novel compound or method, providing robust patent protection when properly construed.
  • Effective patent strategy involves balancing claim breadth with validity concerns, with narrow claims serving as fallback positions.
  • The patent landscape is crowded with similar filings; strategic claiming and ongoing patent prosecution are vital for maintaining competitive advantage.
  • Validity hinges on prior art scrutinization; continuous monitoring of related patents and scientific disclosures is essential.
  • Stakeholders should conduct thorough freedom-to-operate analyses considering the scope of claims and potential infringement risks.

FAQs

Q1: What is the primary inventive concept of U.S. Patent No. 9,375,429?
A1: The patent covers a specific chemical compound, formulation, or treatment method designed to address a particular medical condition, with claims likely focusing on a novel chemical structure or innovative administration technique.

Q2: How broad are the claims in this patent?
A2: The claims’ breadth depends on the language used; they may range from narrowly protecting a specific compound to broadly covering a class of related compounds or methods, subject to validity constraints.

Q3: How does this patent fit within the global patent landscape?
A3: It is part of a patent family filed internationally, aiming to secure protection across key markets. Its position relative to prior art influences its strength and enforceability.

Q4: What risks does the patent face regarding validity?
A4: Challenges could arise if prior art predates the invention, especially if broader claims attempt to monopolize known chemical spaces, necessitating ongoing patent prosecution and defensibility.

Q5: How can competitors navigate around this patent?
A5: Competitors might design around the claims by creating structurally different compounds, using alternative methods, or targeting different indications not covered by the patent.


References

  1. [1] U.S. Patent No. 9,375,429.
  2. [2] USPTO patent database and examination records.
  3. [3] Patent landscape reports related to the specific therapeutic area.
  4. [4] Scientific publications on similar compounds and methods.
  5. [5] Legal analyses of patent claim strategies in pharmaceuticals.

(Note: Specific citations are illustrative; access to the actual patent and related documentation is recommended for detailed analysis.)

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Drugs Protected by US Patent 9,375,429

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Axsome AUVELITY bupropion hydrochloride; dextromethorphan hydrobromide TABLET, EXTENDED RELEASE;ORAL 215430-001 Aug 18, 2022 RX Yes Yes 9,375,429 ⤷  Get Started Free DEXTROMETHORPHAN AND BUPROPION IN COMBINATION TO TREAT MAJOR DEPRESSIVE DISORDER ⤷  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

International Family Members for US Patent 9,375,429

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2014346807 ⤷  Get Started Free
Australia 2015350559 ⤷  Get Started Free
Australia 2018203638 ⤷  Get Started Free
Australia 2019201548 ⤷  Get Started Free
Australia 2019223187 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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