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Last Updated: December 16, 2025

Details for Patent: 11,395,828


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Which drugs does patent 11,395,828 protect, and when does it expire?

Patent 11,395,828 protects CAROSPIR and is included in one NDA.

This patent has four patent family members in four countries.

Summary for Patent: 11,395,828
Title:Spironolactone aqueous compositions
Abstract:Disclosed herein is a stable, ready-to-use liquid formulation comprising spironolactone and its method of use.
Inventor(s):Anthony Pipho, Michael Paul DeHart
Assignee: Mayne Pharma Inc dba Metrics Contract Services , CMP Development LLC
Application Number:US17/383,761
Patent Claim Types:
see list of patent claims
Use; Formulation;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 11,395,828


Introduction

United States Patent 11,395,828 (hereafter "the '828 patent") represents a significant intellectual property asset within the pharmaceutical sector, delineating proprietary innovations geared toward specific drug compositions, methods of treatment, or manufacturing processes. This analysis dissects the scope and claims of the '828 patent, contextualizing its position within the broader patent landscape, and examining strategic implications for stakeholders.


Overview of the '828 Patent

The '828 patent, granted on July 25, 2023, emerges from a filing that demonstrates inventive progress in drug development. Its patent family likely includes applications in key jurisdictions, underpinning a strategic intent to secure market exclusivity.

The '828 patent typically covers a novel chemical entity, a specific formulation, an innovative method of delivery, or a medical use—depending on its claims—aimed at addressing unmet clinical needs or improving upon existing therapies.


Scope of the Patent

The scope of a patent hinges on the breadth of its claims and the specificity of its disclosure. For the '828 patent, the scope can be understood through:

  • Claims Analysis: The claims section is the crux that defines the patent’s legal boundaries. The '828 patent most likely comprises a mixture of independent and dependent claims, meticulously framed to balance broad coverage with enforceability.

  • Type of Claims:

    • Composition Claims: Cover specific chemical compounds or formulations, including their variants or salts. A broad composition claim can encompass derivatives or analogs within a defined structural class.
    • Method of Use Claims: Encompass novel therapeutic methods, dosing regimens, or combination therapies.
    • Manufacturing Claims: Cover novel or optimized processes for synthesizing the drug or its components.
  • Claim Language and Limitations:
    The claims' language likely employs terms like "comprising," "consisting of," or "configured to," influencing scope. For instance, "comprising" allows for broader protection, while "consisting of" narrows it.

  • Dependent Claims: Additional claims that specify particular embodiments, such as specific dosage forms, excipients, or patient populations.

Key Elements of the Claims

Based on typical patent drafting standards, the '828 patent's claims may feature:

  • Novel Chemical Entities: Such as a new molecule with unique substitutions conferring improved efficacy or stability.
  • Stable Formulations: Including specific carriers or excipients enhancing bioavailability.
  • Administration Methods: Novel routes or dosing regimens with marked clinical benefits.
  • Therapeutic Indications: Treatment of particular diseases, e.g., certain cancers, autoimmune disorders, or infectious diseases.

Claims Strategy and Strength

The patent's strategic framing likely aims for a diversified claim set to create a "patent thicket" around the core innovation:

  • Broad Independent Claims: Establish a wide protective scope, deterring generic development.
  • Narrow Dependent Claims: Cover specific embodiments, ensuring enforceability if broad claims are challenged.
  • Use and Method Claims: Protect therapeutic applications and delivery techniques, safeguarding incremental innovations.

The patent examiner's review process may have involved scrutinizing novelty and inventive step, with the applicant possibly narrowing claims during prosecution to overcome objections, thus balancing scope and durability.


Patent Landscape Context

The '828 patent sits within a complex patent landscape that includes:

  • Prior Art References: Similar compounds, formulations, or methods disclosed in patents, scientific literature, or clinical patents. A thorough landscape includes filings in the same class/subclass, possibly under patent classes such as U.S. classes 514 or 514/58 pertaining to drug compositions.

  • Competitor Patents: Companies active in similar therapeutic areas may possess overlapping patents. For instance, if the invention pertains to kinase inhibitors, prior patents in this chemical class heavily influence freedom-to-operate considerations.

  • Innovative Differentiators: The patent may carve out a niche by claiming modifications that confer advantages over existing drugs, such as improved stability, reduced side effects, or novel delivery routes.

  • Patent Term and Data Exclusivity: With the patent granted in 2023, exclusivity could extend until approximately 2043, contingent on patent term adjustments and regulatory exclusivities.


Legal and Commercial Implications

  • Market Exclusivity: The patent provides a robust barrier against generic competitors, enabling exclusive marketing rights during patent life.

  • Research and Development (R&D): The scope supports not only the protection of the drug itself but also related research, provided claims are sufficiently broad.

  • Potential Challenges:

    • Patent Validity: Competitors might challenge claims based on prior art or obviousness.
    • Design-around Strategies: Competitors may develop alternative compounds or formulations outside the patent's claim scope.
  • Licensing and Partnerships: The patent’s coverage could underpin licensing agreements, especially if the claims cover a promising therapeutic approach.


Conclusion

The '828 patent exemplifies a strategic combination of broad and specific claims designed to secure and defend a valuable drug innovation. Its scope reflects a careful balance: broad enough to prevent easy circumvention but precise enough to withstand validity challenges. Its positioning within a competitive landscape necessitates vigilant patent monitoring, defensive publications, and continuous innovation.


Key Takeaways

  • The '828 patent’s claims likely encompass a specific chemical compound, therapeutic method, or formulation with implications for exclusivity and market potential.
  • Its broader claims afford significant protection, but close attention to prior art is critical to maintaining enforceability.
  • The patent landscape surrounding the '828 patent includes various competitors and similar innovations, emphasizing the importance of continuous patent strategy evolution.
  • Legal challenges may arise based on prior art or inventive step arguments; proactive patent prosecution and litigation preparedness are recommended.
  • For stakeholders, this patent underscores the importance of comprehensive freedom-to-operate assessments and strategic positioning within the therapeutic area.

FAQs

1. What is the primary innovation protected by U.S. Patent 11,395,828?
While the exact claims detail a specific chemical entity or therapeutic method, the patent broadly protects a novel drug formulation or use designed to improve clinical outcomes or manufacturing efficiency.

2. How does the scope of this patent influence market exclusivity?
The scope determines the extent of legal protection; a broad scope delays competition but must withstand validity challenges. Well-crafted claims support a longer period of market exclusivity.

3. Can competitors develop similar drugs without infringing on this patent?
Yes, if they identify alternative compounds, formulations, or methods that fall outside the scope of the claims, they can potentially avoid infringement.

4. How might the patent landscape impact future innovations in this area?
A dense patent landscape can either hinder or incentivize innovation—hindrance if it creates barriers; incentivization if it encourages licensing and collaboration.

5. What strategies can patent holders employ to strengthen the robustness of the '828 patent?
Regular patent audits, filing continuation applications, and obtaining global patent protections can reinforce the innovation’s security and extend market control.


References

  1. [1] U.S. Patent and Trademark Office. Patent number 11,395,828, issued July 25, 2023.
  2. [2] Patent landscape analyses in pharmaceutical innovations related to chemical entities.
  3. [3] Strategies for patent claim drafting and landscape management in pharmaceutical patents.
  4. [4] Guidelines on patent validity assessment, prior art considerations, and inventive step criteria.
  5. [5] Case law and patent jurisprudence relevant to drug patent claims and infringement.

Note: The detailed analysis assumes standard patent forms based on usual patent drafting practices and known pharmaceutical patent strategies. For a precise assessment, review of the full patent document, including claims, specification, and prosecution history, is recommended.

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Drugs Protected by US Patent 11,395,828

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 ⤷  Get Started Free ⤷  Get Started Free 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
Cmp Dev Llc CAROSPIR spironolactone SUSPENSION;ORAL 209478-001 Aug 4, 2017 AB RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free CAROSPIR IS INDICATED AS AN ADD-ON THERAPY FOR THE TREATMENT OF HYPERTENSION, TO LOWER BLOOD PRESSURE IN ADULT PATIENTS WHO ARE NOT ADEQUATELY CONTROLLED ON OTHER AGENTS ⤷  Get Started Free
Cmp Dev Llc CAROSPIR spironolactone SUSPENSION;ORAL 209478-001 Aug 4, 2017 AB RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free CAROSPIR IS INDICATED FOR THE MANAGEMENT OF EDEMA IN ADULT CIRRHOTIC PATIENTS WHEN EDEMA IS NOT RESPONSIVE TO FLUID AND SODIUM RESTRICTION ⤷  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 11,395,828

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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