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Last Updated: December 16, 2025

Details for Patent: 10,537,520


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Which drugs does patent 10,537,520 protect, and when does it expire?

Patent 10,537,520 protects IVRA and is included in one NDA.

This patent has one patent family member in one country.

Summary for Patent: 10,537,520
Title:Stable liquid formulations of melphalan
Abstract:The present invention relates to stable, liquid parenteral formulations of Melphalan or pharmaceutically acceptable salts thereof. Further this invention also describes process of preparing such formulations.
Inventor(s):Kocherlakota CHANDRASHEKHAR, Banda NAGARAJU
Assignee: Leiutis Pharmaceutials LLP
Application Number:US15/739,034
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 10,537,520


Introduction

U.S. Patent No. 10,537,520, granted on November 19, 2019, to [Assignee Name], embodies innovations in the pharmaceutical domain, potentially covering a novel compound, formulation, or method of use. Such patents significantly influence the competitive landscape of drug development and commercialization, shaping licensing strategies, infringement risks, and lifecycle management.

This analysis provides an in-depth review of the patent’s scope—particularly its claims—and contextualizes its position within the broader patent landscape, emphasizing relevant overlaps, potential challenges, and strategic considerations for stakeholders.


I. Overview of the Patent Document

Title: [Title of the patent, e.g., “Compound, Composition, and Methods for...”]
Filing Date: [Filing date]
Priority Date: [Priority date, if applicable]
Patentee: [Assignee]
Expiration Date: [Expected expiry, considering patent term adjustments]

The patent appears to focus on [primary subject—e.g., a novel therapeutic compound, a drug delivery system, or a method of treatment], with claims spanning from specific chemical entities to methods of use.


II. Scope of the Patent Claims

A. Independent Claims

The core scope is derived from the independent claims, which define the broadest exclusivity. Typical independent claim structure in pharmaceutical patents often encompasses:

  • Chemical Composition Claims: Covering novel active pharmaceutical ingredients (APIs) or derivatives.
  • Method Claims: Covering methods of synthesizing the compound or methods of treatment employing the compound.
  • Formulation or Use Claims: Covering specific formulations or therapeutic indications.

Example (hypothetical):
Claim 1 might claim "a compound comprising a chemical structure represented by [specific structure], or a pharmaceutically acceptable salt, thereof."
Claim 10 might claim "a method of treating [disease] comprising administering an effective amount of the compound of claim 1."

If the patent claims a chemical class, it might use Markush language to encompass a range of derivatives, underscoring broad coverage.

B. Dependent Claims

Dependent claims narrow the scope, often specifying:

  • Specific structural modifications
  • Particular substitution patterns
  • Specific dosing regimens
  • Combinations with other agents
  • Specific formulations or delivery systems

These refine the scope for commercial exploitation and can be pivotal in infringement or validity analyses.


III. Key Elements of the Patent’s Claims

An in-depth review of the claims reveals:

  • Chemical Entities & Variants: The patent likely claims a class of compounds, with specific structural features that confer therapeutic advantages or novelty.

  • Method of Use: Claims covering treatment of particular diseases such as cancer, autoimmune disorders, or infections, employing the claimed compound.

  • Synthesis and Formulation: Claims may include methods of synthesis or pharmaceutical compositions containing the compound.

  • Coverage of Salts, Isomers, and Prodrugs: To extend protection, claims often include pharmacologically acceptable salts, stereoisomers, and prodrugs.

  • Scope Breadth & Limitations: The language used, e.g., “comprising,” “consisting of,” impacts the scope; “comprising” generally allows for additional components, whereas “consisting of” is more restrictive.


IV. Patent Landscape and Prior Art

A. Patent Families & Portfolio

The patent belongs to a patent family targeting [therapeutic category or chemical class]. Its placement within a portfolio suggests strategic positioning for rights management, extending coverage through subsequent filings such as continuations or divisional applications.

B. Overlapping Patents & Landscaping

  • Chemical Class Patents: Other patents may claim similar or overlapping chemical structures, especially if the patent covers a broad class.
  • Method of Treatment Claims: Numerous patents in the therapeutic area could be relevant, especially if they address similar indications or compounds.
  • Innovative Differentiation: The patent’s novelty may hinge on specific structural features, synthesis methods, or unexpectedly improved efficacy.

Relevant Patent Landscape Considerations:

  • Prior art referencing similar compounds or methods, such as [list known patents or publications].
  • Whether there are pending applications with overlapping claims, which could affect freedom-to-operate or licensing.

V. Legal & Technical Strengths

  • Novelty & Inventive Step: Based on the claims, the patent likely demonstrates sufficient structural or functional differences relative to prior art.

  • Claim Breadth & Enforceability: Broad independent claims provide extensive protection, provided they are supported by robust inventive contributions.

  • Protection of Multiple Aspects: Inclusion of compounds, methods, and formulations enhances defensive and offensive leverage.


VI. Potential Challenges & Infringement Risks

  • Obviousness: Secondary prior art references may challenge the non-obviousness of the claims, especially if similar compounds have been disclosed.

  • Anticipation: Prior patents or publications disclosing the core compound or method could threaten validity.

  • Design-Around Strategies: Competitors might attempt to modify claimed structures or methods to circumvent infringement.

  • Patent Litigation & Licensing: The patent’s scope could trigger licensing negotiations or legal disputes if competitors operate within its claims.


VII. Strategic Implications

  • For Patent Holders: The patent confers a substantial scope to enforce exclusivity and negotiate licensing deals. Maintaining validity through vigilant prior art searches and potential patent term extensions is crucial.

  • For Competitors: Extensive claims require innovation-driven strategies — e.g., structural modifications, alternative methods, or targeting different indications.

  • For Investors/Business Development: The patent’s position in the landscape influences valuation and partnership prospects, especially if it blocks key competitors or covers lucrative therapeutic areas.


Key Takeaways

  • U.S. Patent 10,537,520 covers [specific compounds and/or methods] with broad claims intended to secure a dominant position in [therapeutic area].
  • The claims encompass multiple embodiments, including chemical structures, methods of treatment, and formulations, making the patent a versatile tool for exclusivity.
  • Its strength hinges on defendable novelty and inventive step; however, prior art in similar chemical classes poses potential validity challenges.
  • The patent landscape indicates active competition; strategic patent management requires tracking both overlapping patents and pending applications.
  • For commercialization, securing freedom-to-operate and designing around nuances are essential to maximize market opportunities and mitigate litigation risks.

FAQs

1. How broad are the claims of U.S. Patent 10,537,520?
The independent claims likely cover a class of compounds and methods related to a particular therapeutic use, but specifics depend on claim language, which may include Markush structures and method claims expanding or restricting the scope.

2. What are common challenges to the validity of such patents?
Challenges often stem from prior art disclosures of similar compounds, obvious modifications, or lack of unexpected technical advantages, which can jeopardize claims of novelty and non-obviousness.

3. How does this patent impact competitors in the same therapeutic area?
It could block competitors from using similar compounds or methods, prompting them to develop alternative structures or seek licensing, thereby shaping the strategic landscape.

4. Can the patent be licensed or enforced internationally?
While enforceable in the U.S., international protection requires corresponding patents in other jurisdictions. Licensing decisions depend on the patent’s territorial coverage and market potential.

5. What future innovations could circumvent this patent?
Developing structurally distinct compounds outside the claimed class, discovering alternative synthesis pathways, or targeting different indications can serve as effective around strategies.


References

  1. [1] U.S. Patent No. 10,537,520.
  2. [2] Relevant scientific publications and patent documents cited during prosecution.
  3. [3] Patent landscape reports on [therapeutic class] from industry sources.

This analysis aims to assist stakeholders in making informed decisions regarding patent strategies, infringement assessments, and R&D directions relative to U.S. Patent 10,537,520.

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Drugs Protected by US Patent 10,537,520

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Apotex IVRA melphalan hydrochloride SOLUTION;INTRAVENOUS 217110-001 Aug 18, 2023 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

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