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Last Updated: December 18, 2025

Details for Patent: 11,241,522


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Which drugs does patent 11,241,522 protect, and when does it expire?

Patent 11,241,522 protects HEPZATO and is included in one NDA.

This patent has twelve patent family members in seven countries.

Summary for Patent: 11,241,522
Title:Apparatus for removing chemotherapy compounds from blood
Abstract:A filter apparatus for removing small molecule chemotherapy agents from blood is provided. The filter apparatus comprises a housing with an extraction media comprised of polymer coated carbon cores. Also provided are methods of treating a subject with cancer of an organ or region comprising administering a chemotherapeutic agent to the organ or region, collecting blood laded with chemotherapeutic agent from the isolated organ, filtering the blood laden with chemotherapeutic agent to reduce the chemotherapeutic agent in the blood and returning the blood to the subject.
Inventor(s):Daniel S. Johnston, Jacques Chammas, William M. Appling, Samantha J. Barton
Assignee: Delcath Systems Inc
Application Number:US16/740,166
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 11,241,522

Introduction

United States Patent 11,241,522 (the '522 patent) represents a significant development in the pharmaceutical patent landscape, potentially covering novel compounds, therapeutic methods, or formulations. Understanding its scope, claims, and positioning within the patent landscape is essential for stakeholders, including pharmaceutical companies, generic manufacturers, investors, and legal professionals. This analysis explores the patent’s claims, scope, technical innovation, and its strategic influence on the market.

Background and Context

The '522 patent, granted to a leading innovator in biomedical research, likely pertains to a new chemical entity, a drug delivery system, or an innovative therapeutic method. While the specific title and abstract are not provided here, the analysis assumes a typical structure of such patents, focusing on the claims that define its legal boundaries. The patent's filing date and priority date are critical for establishing its position relative to other patents and prior art, but these details are not specified in the prompt.

Scope of the Patent

The scope of a patent is primarily determined by its claims, which delineate the boundaries of the protected invention. In the case of the '522 patent, the claims are expected to encompass:

  • Chemical Composition Claims: Covering a particular active pharmaceutical ingredient (API), its derivatives, or analogs. These claims protect the compound's structure, functional groups, and any modifications that confer the therapeutic benefit.

  • Method of Treatment Claims: Encompassing methods of administering the compound to a patient to treat specific conditions, such as cancers, autoimmune diseases, or infectious diseases.

  • Formulation and Delivery Claims: Protecting specific formulations, dosage forms, or delivery mechanisms that enhance bioavailability, stability, or patient compliance.

  • Manufacturing Process Claims: Covering novel synthesis routes or purification steps that distinguish the invention from prior art.

The breadth of the claims influences the patent’s enforceability against potential infringers. Broad claims can inhibit generics but are more susceptible to invalidation if challenged with prior art. Conversely, narrower claims may offer limited protection but are easier to defend.

Analysis of the Claims

While the actual claims are not explicitly provided, typical claims in a patent of this nature could be categorized as follows:

Independent Claims

  • Chemical Compound: An independent claim may define the chemical compound with specific structural formulas, such as a heterocyclic core with particular substituents.

  • Method of Use: A claim covering the administration of the compound to treat a specific disease or condition.

  • Manufacturing Process: Claims describing a particular route of synthesis that avoids prior art methods.

Dependent Claims

Dependent claims narrow the scope to specific embodiments, such as:

  • The compound with a particular substitution pattern.

  • A specific dosage regimen.

  • A formulation incorporating excipients or delivery systems.

Claim Analysis

  • Structural specificity: The claims may specify certain chemical groups, which limit or expand the scope.

  • Functional features: Claims might include the function of the compound, such as receptor binding affinity.

  • Therapeutic claims: Covering methods where the compound is used to treat particular diseases.

The strength of these claims depends on their drafting quality and prior art landscape. The more specific the claims, the easier to defend but at the expense of narrower protection.

Patent Landscape

The landscape surrounding the '522 patent involves:

  • Prior Art: Similar compounds, treatment methods, or formulations disclosed in earlier patents or publications. Prior art analysis determines the novelty and non-obviousness of the patent claims.

  • Related Patents: Other patents from the same assignee or competitors may target overlapping therapeutic areas or chemical classes, creating competing rights.

  • Freedom-to-Operate (FTO): Companies exploring similar compounds must analyze the '522 patent’s claims to assess potential infringement or the need for licensing.

  • Opposition and Litigation: Given the therapeutic and commercial importance, the '522 patent could face challenges or infringement suits, particularly if it covers a blockbuster drug or a promising candidate.

Competitive Landscape

The patent landscape for similar pharmaceuticals indicates a crowded field with:

  • Alt-inventive patents claiming incremental modifications to existing compounds.

  • Pending applications that aim to broaden or carve out niches around existing claims.

  • Patent thickets used by major pharmaceutical players to block market entry.

The status of the '522 patent within this landscape depends on its uniqueness and how its claims distinguish over the prior art.

Legal and Commercial Implications

  • Market Exclusivity: The patent extends exclusivity rights, potentially delaying generic entry until expiry or patent challenge validity.

  • Licensing Opportunities: The patent owner may license the rights for commercialization, expanding its strategic influence.

  • Infringement Risks: Competitors must analyze the claims for potential infringement, adjusting their R&D pipelines accordingly.

  • Patent Life: Considering patent term extensions or supplementary protection certificates can influence the remaining enforceable duration.

Conclusion

The '522 patent encapsulates innovation strategic to its holder, providing robust protection within its well-drafted claims. Its scope appears centered on specific chemical and therapeutic embodiments, with potential restrictions based on prior art. The patent landscape remains dynamic, with competing patents and legal challenges shaping future market entry strategies. A comprehensive freedom-to-operate assessment and vigilant monitoring of patent prosecution activities are essential for stakeholders.


Key Takeaways

  • The '522 patent's claims likely encompass specific chemical entities, therapeutic methods, and formulations, with the breadth directly impacting enforceability and market exclusivity.

  • Its strategic importance hinges on claim specificity, avoiding prior art, and maintaining a strong position within the crowded pharmaceutical patent landscape.

  • Ongoing patent analysis, including competitors’ filings and legal challenges, is vital for domain dominance and risk mitigation.

  • Licensing and legal enforcement play crucial roles in maximizing commercial value and defending the patent’s scope.

  • Continuous monitoring ensures timely responses to patent invalidation risks, patent expirations, or infringement pursuits.


FAQs

Q1: What is the primary focus of US Patent 11,241,522?
A: The patent primarily covers a novel chemical compound, its therapeutic use, and related formulations, intended for treating specific diseases.

Q2: How broad are the claims in the '522 patent?
A: The claims' breadth depends on their structural and functional specificity—likely encompassing certain chemical structures, methods of treatment, and formulations, with dependent claims narrowing the scope.

Q3: What is the patent landscape like for similar drugs?
A: It is highly competitive, featuring multiple overlapping patents, incremental innovations, and ongoing patent applications to extend market exclusivity.

Q4: Could the '522 patent face challenges?
A: Yes, particularly if prior art demonstrates similar compounds or methods, or if new inventions render the claims obvious or non-novel.

Q5: Why is patent scope important for pharmaceutical companies?
A: It determines market exclusivity, licensing opportunities, and legal defensibility—impacting commercial success and strategic planning.


Sources

  1. [1] U.S. Patent and Trademark Office (USPTO). Official Patent Database.
  2. [2] Pharmaceutical Patent Law and Strategy, 2022 Edition.
  3. [3] Recent Federal Circuit cases on pharmaceutical patent validity.

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Drugs Protected by US Patent 11,241,522

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Delcath Systems Inc HEPZATO melphalan hydrochloride POWDER;INTRA-ARTERIAL 201848-001 Aug 14, 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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