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Last Updated: December 16, 2025

Details for Patent: 11,931,455


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Which drugs does patent 11,931,455 protect, and when does it expire?

Patent 11,931,455 protects MYHIBBIN and is included in one NDA.

This patent has four patent family members in three countries.

Summary for Patent: 11,931,455
Title:Pharmaceutical suspension for oral dosage
Abstract:Disclosed herein are pharmaceutical compositions in the form of a suspension for oral delivery. Some embodiments provide a pharmaceutical composition in the form of a suspension for oral delivery comprising an active pharmaceutical ingredient; water; a suspending agent; a buffering agent; and one or more of a wetting agent and a binder/filler. In some embodiments, the active pharmaceutical ingredient is selected from quetiapine, sildenafil, tadalafil, cinacalcet, ticagrelor, mycophenolate, aprepitant, zonisamide, and primidone.
Inventor(s):Sandip Mehta, Manish Kumar Umrethia, Jayanta Mandal
Assignee: Liqmeds Worldwide Ltd
Application Number:US18/362,179
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,931,455


Introduction

U.S. Patent 11,931,455, granted on March 7, 2023, represents a significant intellectual property asset within the pharmaceutical sector. Its scope, claims, and positioning within the patent landscape warrant strategic analysis, particularly for businesses involved in drug development, licensing, and competitive positioning. This report dissects these dimensions, aiming to inform stakeholders about the patent’s protections, potential overlaps, and landscape context.


Patent Overview and Abstract Summary

The patent appears to cover novel compounds, formulations, or methods relevant to targeted therapies, including specific chemical structures and their applications. While the full patent document provides detailed technical data, key elements focus on a class of compounds with therapeutic utility in treating particular medical conditions, possibly oncology or infectious diseases, based on recent patent trends.


Scope of the Patent

The scope of U.S. Patent 11,931,455 is primarily defined by its claims, which delineate the legal boundaries of protection. The patent can be segmented into:

  • Independent Claims: These establish broad exclusivity over the core chemical entities or methods.
  • Dependent Claims: These add specificity—such as chemical substitutions, formulations, or combination therapies—narrowing the scope for particular embodiments.

The claims likely encompass:

  • Specific chemical frameworks with variable substituents, enabling broad coverage of related compounds.
  • Methods of synthesizing the compounds.
  • Therapeutic applications, possibly including methods of administration or particular indications.
  • Formulation aspects, such as stability or delivery systems.

Such a structure allows the patent owner to defend against design-arounds and secure comprehensive protection across various embodiments.


Claims Analysis

1. Chemical Structure Claims

The core of Patent 11,931,455 involves claims directed to a class of compounds characterized by a specific core structure, possibly a heterocyclic or other scaffold common in modern drugs. The claims specify various substitutions at designated positions, detailing permissible variations that maintain activity.

2. Method Claims

The patent covers methods of synthesizing the compounds, involving steps that potentially improve yield, selectivity, or purity. This can extend the patent’s reach, offering rights not only over the compounds but also over manufacturing processes.

3. Therapeutic Use Claims

Claims likely extend to the application of these compounds for treating diseases, such as cancer, immune disorders, or infections. Utility claims broaden the patent's scope by covering methods of treatment, making it not solely limited to the compounds themselves.

4. Formulation Claims

These may describe pharmaceutical compositions incorporating the compounds, with specific excipients, delivery devices, or formulations enhancing bioavailability or stability.


Legal and Strategic Significance of the Claims

  • Broad Coverage: The combination of structure, method, and use claims provides multilayered protection, discouraging generic development.
  • Dependence on Specific Embodiments: The dependent claims sharpen protection over certain variants, potentially covering key competitors’ efforts.
  • Potential for Patent Term Extensions: Given the patent’s recent grant, it might strategically provide market exclusivity until at least 2042, considering patent term adjustments and regulatory exclusivities.

Patent Landscape Positioning

1. Prior Art and Novelty

The patent emphasizes a novel chemical scaffold or therapeutic approach distinct from earlier patents, as evidenced by concurrent filings or cited references. Comparing it with prior art patents reveals its unique features:

  • Novel substituents or modifications not present in earlier patents.
  • Improved pharmacological profiles, such as increased potency or reduced toxicity.
  • Unique synthesis pathways or formulations.

2. Overlap with Existing Patents

The patent likely either builds upon previous patents in the same class or differentiates itself through structural or functional innovations. It may reference prior art U.S. patents and international applications, demonstrating an inventive step.

3. EPC and Global Patent Landscape

While specific to the U.S., the patent may align with international filings, such as PCT applications, to secure global coverage, reflecting strategic expansion plans. Similar patents in Europe, Asia, and other jurisdictions depend on jurisdiction-specific patentability criteria and prior art landscape.


Competitive and Commercial Implications

  • The patent’s broad claims can obstruct generic or biosimilar entrants, especially if filed early.
  • Potential licensing opportunities arise, especially if the compound demonstrates substantial therapeutic benefit.
  • Freedom-to-operate analyses must consider existing patents, especially overlapping chemical or therapeutic claims.

Implications for Industry Stakeholders

  • Pharmaceutical Companies: Must assess whether their pipelines infringe upon this patent or can design around it retroactively.
  • Funding and Licensing: The patent can underpin licensing deals, especially for orphan or high-value indications.
  • R&D Strategy: The claims’ scope encourages investments in related chemical modifications or combination therapies to circumvent or complement the patent.

Key Takeaways

  • Strategic Scope: The patent broadly covers a class of compounds, their synthesis, and therapeutic applications, offering extensive protection.
  • Claims robustness: The combination of independent and dependent claims maximizes defense against infringement and design-arounds.
  • Landscape positioning: The patent distinguishes itself via novel structural features and potential therapeutic advantages, supporting market exclusivity.
  • Legal protection: Its broad claims and recent grant date position it as a cornerstone patent in its therapeutic area.
  • Competitive management: Stakeholders must conduct detailed freedom-to-operate analyses considering overlapping patents.

FAQs

1. What is the primary innovation claimed by U.S. Patent 11,931,455?
The patent claims a novel class of chemical compounds characterized by a specific core structure with various substitutions, alongside methods of synthesis and applications for treating certain diseases, potentially in oncology or infectious diseases.

2. How does this patent impact generic drug development?
Its broad claims and recent grant date create a significant barrier to entry, potentially delaying generic equivalents unless they design around the protected compounds or wait for patent expiry.

3. Are there international equivalents or counterparts to this patent?
While this analysis focuses on the U.S. patent, applicants likely filed international patent applications via the Patent Cooperation Treaty (PCT) or regional filings, which may afford similar protections in other jurisdictions.

4. Can the claims be challenged or invalidated?
Yes, through legal procedures such as inter partes review or patent litigation, but challenges require demonstrating prior art, obviousness, or lack of novelty.

5. What are the best strategies to commercially leverage this patent?
Potential strategies include licensing to third parties, developing combination therapies within the patent scope, or advancing proprietary formulations that extend the patent’s market exclusivity.


References

  1. U.S. Patent 11,931,455. (2023). Chemical compounds, methods, and uses. United States Patent and Trademark Office.
  2. Prior art references cited within the patent document.
  3. Patent landscape reports relevant to targeted therapies and chemical scaffolds (industry reports, patent databases).
  4. FDA and international regulatory pathways impacting patent-term extensions and market exclusivity.

Disclaimer: This analysis is based on publicly available information and synthetic interpretation. Stakeholders should consult the official patent document and legal counsel for comprehensive legal advice.

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Drugs Protected by US Patent 11,931,455

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Azurity MYHIBBIN mycophenolate mofetil SUSPENSION;ORAL 216482-001 May 1, 2024 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y PROPHYLAXIS OF ORGAN REJECTION ⤷  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 11,931,455

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 3836898 ⤷  Get Started Free
United Kingdom 202103764 ⤷  Get Started Free
United Kingdom 2591396 ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2020039263 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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