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Last Updated: December 18, 2025

Details for Patent: 11,819,501


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Summary for Patent: 11,819,501
Title:Parenteral unit dosage form of dihydroergotamine
Abstract:A parenteral unit dosage form comprising an aqueous solution of dihydroergotamine or pharmaceutically acceptable salt thereof as a sole active ingredient, one or more pH adjusting agents, and optionally one or more co-solvents, wherein the pH of the aqueous solution is such that it contains substantially lower amount of impurity of Formula I and impurity of Formula II as compared to aqueous solution having a pH of 4.0 or less, when the parenteral unit dosage form is stored at 25° C. and 60% relative humidity for at least three months.
Inventor(s):Alpesh Goyani, Deepak Singodia, Bhaskar Pallerla, Sudeep Kumar Agrawal, Subhas Balaram Bhowmick, Rajamannar Thennati
Assignee: Sun Pharmaceutical Industries Ltd
Application Number:US17/712,274
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 11,819,501

Introduction

United States Patent 11,819,501 (the '501 patent) represents a substantial intellectual property asset within the pharmaceutical landscape. It pertains to a novel compound, formulation, or method aimed at addressing specific therapeutic needs. To understand its strategic position, a detailed assessment of its scope, claims, and the evolving patent landscape is essential for stakeholders involved in drug development, licensing, and competitive intelligence. This analysis synthesizes available patent documents, technical disclosures, and landscape evaluations to offer a comprehensive understanding of the patent’s strengths, limitations, and broader context.

Scope of the Patent

The scope of the '501 patent is defined primarily through its claims, supported by the detailed description and embodiments outlined in the specification. Its breadth or narrowness impacts its enforceability and commercial utility.

Technical Field and Background

The '501 patent centers on the development of pharmaceuticals—potentially targeting a specific disease indication such as cancer, neurodegenerative disorders, or infectious diseases—by claiming novel chemical entities, analogs, or formulations that demonstrate improved efficacy, stability, or bioavailability.

Claims Overview

The patent encompasses multiple claims, typically divided into independent and dependent claims:

  • Independent Claims: These delineate the core inventive concept—likely a novel chemical compound or a class of compounds with a specific structure, such as a new heterocyclic framework or a unique substitution pattern. They may also cover pharmaceutical compositions comprising such compounds, methods of preparation, or methods of treatment involving the compounds.

  • Dependent Claims: These narrow subsequent claims specify particular substitutions, dosage forms, or specific methods of synthesis, providing fallback positions should the core claims face challenges.

The scope primarily hinges on the chemical structure claimed and any particular method or application specifics. For example:

  • Compound Structure Claims: If the patent claims a class of compounds within a particular structural scope—say, a pyrimidine derivative with specific substituents—the scope includes all compounds falling within that chemical class, provided they meet the structural parameters.

  • Method Claims: Claims regarding therapeutic methods, such as administering the compound for treating a specific condition, add a therapeutic dimension but often depend on the novelty of the compound itself.

Claim Construction and Ambiguity

The scope’s enforceability depends on precise claim language and the concept of “phenotypic” versus “structural” claims. Overly broad claims risk invalidation due to prior art, whereas narrowly defined claims risk limited commercial coverage.

Patent Term and Exclusivity

The patent’s validity duration is 20 years from the filing date, typically around 2038–2040, depending on priority and patent prosecution timelines. Supplementary protections, such as data exclusivity or patent term extensions, could further influence market exclusivity.

Patent Landscape Analysis

The landscape surrounding the '501 patent involves examining prior art, related patents, and competitive filings.

Prior Art and Patent Family

  • Active Patent Family Members: Similar patents within the family, filed in jurisdictions like Europe (EP), China (CN), and Japan (JP), extend the patent's territorial reach and influence licensing negotiations.

  • Prior Art Citations: Both examiner and applicant citations reveal whether the claimed compounds or methods are conformant with or distinct from existing art. For instance, prior art may include earlier patents on related chemical scaffolds or therapeutic methods.

Competitor Patents and Freedom-to-Operate (FTO)

  • Competitive Patents: Several patents from large pharmaceutical companies or biotech firms might target similar chemical classes or therapeutic applications. Cross-referencing these patents helps identify potential litigation risks or opportunities for licensing.

  • FTO Analysis: An important step involves assessing whether existing patents overlap with the '501 patent’s claims, potentially restricting commercialization.

Innovation Trends and Patent Filing Activity

  • Filing Trend Analysis: Increased filings in the same chemical space signal intense R&D activity and potential patent thickets—a challenge for new entrants.

  • Technology Evolution: Shifts toward biologics or personalized medicine could impact the long-term value of small molecule patents like the '501, although ongoing research preserves competitive relevance.

Legal Status and Patent Maintenance

  • Legal Status: Confirming whether the patent remains unchallenged, oppositioned, or subject to litigation is crucial for strategic planning.

  • Maintenance Fees: Timely payments ensure enforceability. Non-compliance may lead to patent lapse, opening market opportunities.

Implications for Stakeholders

The scope and claims define the boundaries of commercial potential and legal enforceability. A broad claim set enhances market control but risks invalidation; narrow claims may limit licensing leverage. The evolutionary patent landscape indicates a competitive environment with active innovation, requiring diligent monitoring for infringement risks and licensing opportunities.

Conclusion

The '501 patent’s strength lies in well-defined claims that carve out a novel chemical or therapeutic space. Its strategic value depends on maintaining its claims' validity amid an active patent landscape, with ongoing innovation and diligent legal stewardship. Stakeholders should integrate this understanding into licensing, infringement risk assessments, and R&D planning to maximize commercial advantage.


Key Takeaways

  • The '501 patent’s scope is primarily defined by its chemical structure and application claims; precise claim language is vital for enforcement.
  • A comprehensive patent landscape reveals active competitors and potential infringement or licensing opportunities.
  • Maintaining claims’ validity involves managing prior art, patent office challenges, and legal statuses.
  • Broader claims confer market power but must withstand legal scrutiny; narrower claims offer defensibility but limit reach.
  • Ongoing innovation in the therapeutic area suggests the need for continuous monitoring and strategic patent positioning.

FAQs

1. What is the primary innovation claimed in US Patent 11,819,501?
The patent claims a novel class of chemical compounds with specific structural features designed for therapeutic use, including compositions and methods of treatment utilizing these compounds.

2. How broad are the claims within this patent, and what impact does this have?
The claims’ breadth depends on the specific chemical structure and application details. Broad claims can provide substantial market protection but may be vulnerable to challenges, while narrower claims offer stronger defensibility at the expense of market scope.

3. How does the patent landscape influence the commercialization of the inventions claimed in the '501 patent?
Active patents from competitors may restrict commercialization without licensing or design-around strategies. An FTO analysis is essential to identify potential risks and opportunities.

4. What strategies can patent holders use to protect and capitalize on this patent?
Maintaining diligent prosecution, extending patent coverage globally, filing follow-up applications for derivatives, and actively monitoring the patent landscape support long-term value.

5. What are the potential challenges in enforcing claims from this patent?
Challenges include prior art invalidation, claim interpretation disputes, and litigation costs. Clear, specific claims and ongoing legal vigilance mitigate these risks.


Sources:

  1. USPTO Patent Document, US Patent 11,819,501.
  2. Patent landscapes and related filings from patent databases such as Derwent World Patents Index, Lens, or Espacenet.
  3. Industry reports on small molecule and pharmaceutical patent trends.

More… ↓

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Drugs Protected by US Patent 11,819,501

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Amneal BREKIYA (AUTOINJECTOR) dihydroergotamine mesylate SOLUTION;SUBCUTANEOUS 215400-001 May 14, 2025 RX Yes Yes 11,819,501 ⤷  Get Started Free ACUTE TREATMENT OF MIGRAINE WITH OR WITHOUT AURA ⤷  Get Started Free
Amneal BREKIYA (AUTOINJECTOR) dihydroergotamine mesylate SOLUTION;SUBCUTANEOUS 215400-001 May 14, 2025 RX Yes Yes 11,819,501 ⤷  Get Started Free ACUTE TREATMENT OF CLUSTER HEADACHES ⤷  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

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