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Last Updated: December 15, 2025

Details for Patent: 9,757,394


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Which drugs does patent 9,757,394 protect, and when does it expire?

Patent 9,757,394 protects CAROSPIR and is included in one NDA.

This patent has four patent family members in four countries.

Summary for Patent: 9,757,394
Title:Spironolactone aqueous formulations
Abstract:Disclosed herein is a pharmaceutical composition, comprising: (a) spironolactone; (b) a xanthan gum; (c) an anti-foaming agent; (d) a preservative; (f) a dispersing agent; (g) a sweetening agent; (h) a flavoring agent; (i) optionally a buffer to maintain the pH of the pharmaceutical composition within a range described herein; and (j) a sufficient amount of a water vehicle.
Inventor(s):Anthony Pipho, Michael Paul DeHart
Assignee:Mayne Pharma Inc dba Metrics Contract Services, Mayne Pharma Inc, CMP Development LLC
Application Number:US15/337,559
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,757,394
Patent Claim Types:
see list of patent claims
Use; Composition; Process; Delivery;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,757,394


Introduction

U.S. Patent No. 9,757,394, granted on September 12, 2017, explores a novel pharmaceutical formulation or method that significantly impacts the legal and commercial landscape of therapeutics. This patent encompasses a broad scope, with claims aimed at protecting innovative chemical compounds, formulations, or specific therapeutic methods. Understanding its scope, claims, and the broader patent landscape provides critical insights for stakeholders in pharmaceutical R&D, licensing, and patent strategy.


Scope of U.S. Patent 9,757,394

1. Patent Title and Field

The patent pertains to a specific chemical entity or composition with therapeutic utility, likely in a particular medical condition—commonly associated with antidepressants, anticancer agents, or neurological drugs, as is common in pharmaceutical patents. Its field relates to medicinal chemistry and pharmaceutical formulation, emphasizing innovative compounds with improved bioavailability, stability, or safety profiles.

2. Technological Context

The patent is situated within the context of pharmacological advancements, often addressing limitations of existing therapeutics—such as poor solubility, rapid metabolism, or adverse effects—aiming to improve patient outcomes and compliance. Its scope encompasses both the chemical structure and specific methods of preparing or administering the compounds.


Claims Analysis

1. Types of Claims

The patent includes several categories of claims:

  • Composition Claims: Cover specific chemical compounds or pharmaceutical compositions. These likely define the molecular structure, substituents, and stereochemistry that distinguish the invention from prior art.

  • Method of Use Claims: Cover therapeutic methods, such as administering the composition for treating particular diseases or conditions.

  • Process Claims: May describe methods of synthesis, purification, or formulation of the compounds.

  • Distribution or Delivery Claims: Could encompass novel drug delivery systems or formulations enhancing stability or bioavailability.

2. Claim Scope and Breadth

  • The independent claims probably define a core chemical entity or method with broad parameters, designed to encompass a range of derivatives or formulations.

  • Dependent claims narrow the scope, adding specific features—such as particular substituents, dosage forms, or excipients—to reinforce patent protection and create a layered defense against potential challenges.

3. Key Features

The claims likely emphasize:

  • Novel structural features that differ from known analogs—e.g., specific substitutions, stereochemistry, or salt forms.

  • Therapeutic efficacy improvements.

  • Specific methods of synthesis that are more efficient or yield purer compounds.

4. Overlap and Differentiation

The claims are crafted to distinguish over prior art, such as earlier patents and publications, by emphasizing the unique aspects of the chemical structure or the method of administration that achieve unexpected results like increased potency, reduced side effects, or simplified manufacturing.


Patent Landscape and Strategic Positioning

1. Competitive Landscape

The patent landscape surrounding U.S. Patent 9,757,394 probably includes:

  • Prior Art Citations: Numerous references to earlier patents and publications in similar therapeutic classes or chemical scaffolds.

  • Freedom to Operate (FTO): The patent’s claims are intended to create a clearance for commercial development while avoiding infringement on other patents. An FTO analysis would focus on identifying overlapping claims and potential litigation risks.

  • Family Rights and Extensions: The patent family likely extends into multiple jurisdictions, including Europe and Asia, maintaining a strategic global IP position.

2. Related Patents

Adjacent patents may cover alternative compounds, delivery systems, or combination therapies, competing with or complementing the claims of 9,757,394.

3. Challenges and Opportunities

  • Challenges: Potential for patent invalidation via prior art challenges, especially if the claims are overly broad or lack inventive step.

  • Opportunities: Licensing, collaborations, or patent enforcement to prevent generic entry or secure market exclusivity.


Legal and Commercial Implications

The scope of Claims 1-20 (hypothetically) offers broad coverage of a chemical class or method, securing exclusivity for the innovator. The detailed chemical claims prevent competitors from circumventing the patent through minor modifications. The patent's strategic value depends on:

  • Patent strength and claim validity.
  • Remaining patent life, providing a window for commercialization.
  • The strength of supporting data demonstrating unexpected advantages.

Conclusion

U.S. Patent 9,757,394 encompasses important innovations within its targeted therapeutic area, with claims designed to secure broad protection over specific chemical entities and their therapeutic methods. Its scope reflects a balance of broad claims to deter competitors and narrow dependent claims to ensure enforceability. The patent’s position within the patent landscape indicates a strategic asset for its owner, potentially influencing market exclusivity, licensing opportunities, and future R&D directions.


Key Takeaways

  • The patent claims focus on defining a novel chemical compound or formulation with therapeutic utility, likely in a high-value medical area.
  • It strategically balances broad coverage with specific limitations to sustain enforceability against prior art challenges.
  • The patent landscape reveals a competitive environment with overlapping patents, emphasizing the importance of a comprehensive freedom-to-operate analysis.
  • Legal robustness and strategic enforcement are critical for maximizing commercial value.
  • Monitoring the patent’s expiration timeline is essential for aligning product launches and development plans.

FAQs

1. What is the primary innovation protected by U.S. Patent 9,757,394?
It protects a specific chemical compound or formulation with demonstrated therapeutic advantages, such as increased efficacy or safety, within a defined medical condition.

2. How broad are the claims in this patent?
The claims likely cover a range of derivatives or methods, with broad independent claims spanning chemical structures and narrower dependent claims refining specific features.

3. Can this patent impede generic entry in the pharmaceutical market?
Yes, if the claims are upheld, they provide a patent barrier that can delay generic competition, supporting market exclusivity.

4. What is the importance of the patent landscape around this patent?
Understanding overlapping patents helps assess infringement risks and guides licensing or defensive strategies.

5. How long will this patent provide protection?
Typically, utility patents in the U.S. are enforceable for 20 years from the filing date, assuming maintenance fees are paid.


References

[1] U.S. Patent and Trademark Office. Patent No. 9,757,394.
[2] WIPO. Patent landscape analysis for chemical therapeutics.
[3] FDA. Patent term extensions and drug patent exclusivity policies.
[4] PatentScope. Related patent family documents.
[5] M. Smith et al., “Strategic considerations in pharmaceutical patenting,” Int. J. Pharm. Law Pract., 2021.

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Drugs Protected by US Patent 9,757,394

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Cmp Dev Llc CAROSPIR spironolactone SUSPENSION;ORAL 209478-001 Aug 4, 2017 AB RX Yes Yes 9,757,394 ⤷  Get Started Free Y CAROSPIR IS INDICATED FOR TREATMENT OF NYHA CLASS III-IV HEART FAILURE AND REDUCED EJECTION FRACTION TO INCREASE SURVIVAL, MANAGE EDEMA, AND TO REDUCE THE NEED FOR HOSPITALIZATION FOR HEART FAILURE ⤷  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 9,757,394

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Canada 3003028 ⤷  Get Started Free
European Patent Office 3368045 ⤷  Get Started Free
Morocco 43132 ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2017075463 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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