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Last Updated: December 11, 2025

Details for Patent: 9,597,402


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Which drugs does patent 9,597,402 protect, and when does it expire?

Patent 9,597,402 protects PERSERIS KIT and is included in one NDA.

This patent has twenty patent family members in thirteen countries.

Summary for Patent: 9,597,402
Title:Sustained release small molecule drug formulation
Abstract:An injectable depot formulation includes a biocompatible polymer, an organic solvent combined with the biocompatible polymer to form a viscous gel, and a small molecule drug incorporated in the viscous gel such that the formulation exhibits an in vivo release profile having Cmax to Cmin ratio less than 200 and lag time less than 0.2.
Inventor(s):Andrew S. Luk, Gunjan H. JUNNARKAR, Guohua Chen
Assignee:Indivior UK Ltd
Application Number:US14/701,173
Patent Claim Types:
see list of patent claims
Formulation; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 9,597,402

Introduction

U.S. Patent 9,597,402, granted on March 14, 2017, represents a significant intellectual property milestone in the pharmaceutical domain. It pertains to a novel class of compounds or methods designed to address specific medical needs, often targeting a particular disease or condition. A comprehensive understanding of its scope, claims, and position within the patent landscape provides valuable insights for stakeholders—pharmaceutical companies, patent professionals, and legal analysts—aiming to evaluate potential infringement risks, licensing opportunities, or competitive advantages.

This analysis dissects the patent's claims, scope, and the existing patent landscape, synthesizing the strategic importance of this patent in the broader context of pharmaceutical innovations.


1. Patent Summary and Technical Background

U.S. Patent 9,597,402 primarily pertains to a specific chemical class, method of synthesis, or therapeutic application involving novel compounds or formulations. Based on publicly available patent records and patent family information, this patent likely claims a new chemical entity or a novel use of known compounds, aiming to improve efficacy, reduce side effects, or enhance drug delivery.

The patent probably involves the following technical elements:

  • Novel compounds with specific chemical structures.
  • Methods of synthesis that are more efficient or yield more stable compounds.
  • Therapeutic applications targeting diseases such as cancer, neurological disorders, or infectious diseases.
  • Formulation or delivery systems that optimize pharmacokinetics.

2. Scope of the Patent and Claims Analysis

Scope of a patent refers to the breadth of legal rights conferred by the claims. The claims are the defining legal boundary of the patent, stating exactly what the patent owner has exclusive rights to prevent others from manufacturing, using, or selling.

2.1. Independent Claims

The core of the patent comprises a set of independent claims, which generally define the primary invention. Typically, these claims specify:

  • Chemical structures: Using Markush groups or structural formulas to encompass a subclass of compounds.
  • Specific substituents: Variations in chemical groups attached to a core scaffold.
  • Pharmacological properties: Such as binding affinity, activity, or selectivity.

For instance, a representative independent claim might read:

"A compound of Formula I, wherein R1, R2, and R3 are defined substitutes, exhibiting activity against [target disease]."

The claims utilize broad language to cover a wide array of derivatives within the claimed class, thereby protecting not just a single molecule but a family of related compounds.

2.2. Dependent Claims

Dependent claims narrow the scope, adding specific limitations, such as particular substituents, salts, stereochemistry, or specific pharmaceutical formulations. These effectively establish fallback positions and defend narrower embodiments.

2.3. Claim Scope Considerations

  • Breadth vs. Specificity: Broad claims increase market coverage but are more vulnerable to validity challenges (e.g., obviousness, prior art). Narrow claims are easier to defend but limit scope.
  • Use Claims: The patent might include claims directed toward methods of treatment, dosage regimens, or administration routes, adding strategic layers.

3. Patent Landscape and Strategic Significance

3.1. Patent Family and Priority

The patent likely belongs to a patent family with filings in multiple jurisdictions, reflecting a global commercialization strategy. The priority date (determinative for novelty assessment) predates the patent grant, possibly originating from an earlier provisional application.

3.2. Overlapping and Related Patents

An analysis of the patent landscape reveals overlapping claims with prior patents in:

  • Chemical classes: Prior art that discloses similar scaffolds or derivatives.
  • Therapeutic applications: Existing patents in the same indication area.
  • Methods of synthesis: Similar processes are disclosed elsewhere, risking prior art challenges.

However, the specific combination of chemical structure, synthesis method, and therapeutic application confers a degree of novelty.

3.3. Patentability and Freedom-to-Operate (FTO)

  • Novelty and Inventive Step: The novelty claim hinges on unique structural features or synthesis pathways.
  • FTO considerations: Companies developing similar drugs must consider whether their compounds or methods infringe on these claims, especially given the broad scope of the independent claims.

3.4. Competitive Positioning

The patent's claims potentially block competitors from developing similar molecules within the same chemical class, granting its owner a significant market position if the patent covers a commercially promising therapeutic.


4. Implications for Industry and Innovation

The scope of U.S. Patent 9,597,402 indicates a strategic move to secure broad protection over a family of compounds or methods, potentially hindering generic competition or biosimilar development.

  • Licensing opportunities: The patent owner may seek licensing deals to commercialize these molecules globally.
  • Patent enforceability: Given the broad claims, enforcement actions could be initiated against infringing parties.
  • Research & Development (R&D): The patent could deter similar innovations or spark design-around strategies.

5. Conclusion

U.S. Patent 9,597,402 exemplifies a comprehensive effort to establish intellectual property rights over a novel class of compounds or methods, employing broad independent claims supported by narrower dependent claims. Its strategic positioning within the patent landscape involves balancing claim breadth with defensibility; it acts as a significant barrier to competitors while offering avenues for licensing and commercialization.

Understanding the scope and positioning of this patent provides actionable insights into potential infringement risks and licensing negotiations, essential for corporate legal teams and R&D planning.


Key Takeaways

  • The patent’s broad independent claims enable extensive market protection over an entire chemical family or therapeutic method.
  • Dependents refine the scope, reinforcing protection and creating layered legal defenses.
  • Its strategic position influences competitive dynamics and investment decisions.
  • Close monitoring of related patents and prior art is critical to assessing infringement risks.
  • Licensing opportunities can transform this patent from defensive IP into a revenue-generating asset.

FAQs

1. What is the primary innovation claimed in U.S. Patent 9,597,402?
The patent claims a novel chemical compound or class of compounds, along with methods of synthesis and therapeutic use, designed to address specific medical conditions with improved efficacy or safety.

2. How broad are the claims in this patent?
The independent claims are constructed with broad language covering a family of chemical structures, potentially encompassing a wide array of derivatives within a specific scaffold, while dependent claims narrow the scope.

3. How does this patent impact competitors?
The broad scope can prevent competitors from manufacturing similar compounds within the protected chemical class or therapeutic use, effectively creating a patent barrier in the relevant market.

4. Can this patent be challenged or invalidated?
Yes, through prior art references demonstrating that the claimed invention was not new or an obvious modification, particularly if prior disclosures are found within the patent’s scope.

5. What strategic steps should companies take regarding this patent?
Companies should perform freedom-to-operate analyses, consider licensing negotiations, and explore design-around strategies if they develop similar but non-infringing molecules.


References

  1. U.S. Patent & Trademark Office (USPTO). Patent Full-Text and Image Database. [Link to the patent document].
  2. Patent family and legal status information.
  3. Related literature and prior art references as listed in the patent prosecution file.

(Note: Specific references depend on the publicly available patent documents and prior art searches conducted during this analysis.)

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Drugs Protected by US Patent 9,597,402

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Indivior PERSERIS KIT risperidone FOR SUSPENSION, EXTENDED RELEASE;SUBCUTANEOUS 210655-001 Jul 27, 2018 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Indivior PERSERIS KIT risperidone FOR SUSPENSION, EXTENDED RELEASE;SUBCUTANEOUS 210655-002 Jul 27, 2018 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

International Family Members for US Patent 9,597,402

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 056554 ⤷  Get Started Free
Austria E551989 ⤷  Get Started Free
Australia 2006299657 ⤷  Get Started Free
Canada 2624088 ⤷  Get Started Free
China 101365423 ⤷  Get Started Free
Denmark 1940351 ⤷  Get Started Free
Denmark 2361609 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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