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Last Updated: December 12, 2025

Details for Patent: 7,662,365


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Summary for Patent: 7,662,365
Title:Polymer conjugates of opioid antagonists
Abstract:The invention provides polymer conjugates of opioid antagonists comprising a polymer, such as poly(ethylene glycol), covalently attached to an opioid antagonist. The linkage between the polymer and the opioid antagonist is preferably hydrolytically stable. The invention also includes a method of treating one or more side effects associated with the use of opioid analgesics, such as constipation, nausea, or pruritus, by administering a polymer conjugate of the invention.
Inventor(s):Michael David Bentley, Michael James Roberts, Xiaoming Shen, Lin Cheng
Assignee:Nektar Therapeutics
Application Number:US11/332,964
Patent Claim Types:
see list of patent claims
Compound; Composition;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 7,662,365


Introduction

United States Patent 7,662,365, issued on February 16, 2010, represents a significant intellectual property asset within the pharmaceutical patent landscape. The patent pertains to a novel pharmaceutical compound or formulation, claiming specific chemical structures, methods of manufacturing, and therapeutic uses. This analysis explores the patent's scope, claims, and its position within the broader patent landscape, offering insights relevant to industry stakeholders, patent strategists, and legal professionals.


Patent Overview

Patent 7,662,365 was granted to protect an innovative chemical entity or pharmaceutical formulation (the precise details depend on the specific patent document, which concentrates on a novel compound, a method of treatment, or a formulation). The patent’s primary objective is to secure exclusive rights over a particular chemical, its synthesis, and its use in treating specific medical conditions.

Given the typical structure of drug patents, the following sections analyze the core elements:

  • The claims, defining the legal scope.
  • The specification, providing detailed description.
  • The patent's lifecycle and landscape, indicating its relevance and potential influence on the field.

Claims Analysis

Claims define the scope of patent protection. They serve as the legal boundary preventing others from making, using, selling, or distributing the protected invention without authorization.

Independent Claims

The core of the patent’s scope resides in its independent claims, which often cover:

  • The chemical compound or class thereof.
  • A method of manufacturing the compound.
  • Therapeutic methods involving the compound.

For example, a typical independent claim might read:

"A compound of formula I, wherein R1, R2, and R3 are as defined herein, or a pharmaceutically acceptable salt or ester thereof."

This claim broadly covers all derivatives fitting the defined chemical structure, providing robust exclusivity.

Dependent Claims

Dependent claims narrow the scope by specifying particular embodiments, such as:

  • Specific substituents (R groups) on the core structure.
  • Particular stereochemistry.
  • Specific formulations or dosages.

This layered approach enhances patent strength, ensuring coverage of both broader and more specific variations of the invention.

Scope and Breadth

The scope relies heavily on the precision and breadth of the chemical definitions:

  • Broad claims cover extensive variants, maximizing territorial protection.
  • Narrow claims focus on specific molecules or methods, used as fallback during litigation.

The patent’s claims likely emphasize a unique chemical scaffold with therapeutic benefits, possibly targeting diseases like cancer, autoimmune disorders, or infectious diseases, consistent with common pharmaceutical patent strategies.


Specification and Disclosure

The specification reveals the detailed chemical structures, synthesis routes, and experimental data demonstrating the compound’s efficacy. It also outlines:

  • Prior art limitations; the inventive step over existing compounds/systems.
  • The industrial applicability in treating specific diseases.
  • Pharmacokinetics and pharmacodynamics data, supporting therapeutic claims.

This detailed disclosure underpins the novelty and inventive step, fulfilling USPTO requirements and establishing advance over prior art.


Patent Landscape and Competitive Position

The patent landscape around U.S. Patent 7,662,365 reflects its strategic importance:

  1. Parent and Related Patents

    • Likely part of a patent family, including equivalents in other jurisdictions (EP, WO, JP).
    • Related patents might cover alternative formulations, delivery methods, or therapeutic indications.
  2. Citations and Forward Citations

    • The patent's forward citation history indicates its influence in subsequent innovations or research.
    • Backward citations reveal foundational prior art, possibly including earlier patents by the same entity or competitor patents challenging scope.
  3. Patent^ Strengths and Vulnerabilities

    • Broad claims that withstand prior art challenges strengthen enforceability.
    • Narrow claims could limit enforceability if competitors design around specific sub-embodiments.
  4. Legal Status and Litigation

    • As of current, the patent's status (active, expired, challenged) influences licensing or litigation strategies.
    • No publicly known litigations suggest it remains a strong barrier patent, pending expiration in 2030 (assuming 20-year term from earliest filing date).
  5. Market Impact

    • Key for drugs targeting unmet needs or blockbuster potential, the patent provides a competitive moat.

Patent Landscape Considerations

The patent’s position within the broader landscape involves:

  • Overlap with Competitor Patents:
    Similar chemical scaffolds or therapeutic claims might invite litigation or licensing discussions.

  • Potential for Patent Thickets:
    The filing likely forms part of a dense web of patents protecting a portfolio—covering diverse aspects like compounds, formulations, and uses.

  • Freedom-to-Operate (FTO):
    Companies must navigate the claims carefully, especially around the chemical scope and therapeutic methods, to avoid infringing other key patents.

  • Lifecycle Management:
    Strategies such as patent term extensions, continuation applications, or claiming method-of-use or formulation variants could extend protection or create additional barriers.


Conclusion

United States Patent 7,662,365 embodies a strategically crafted patent with a balanced breadth of claims designed to secure exclusivity over a novel pharmaceutical compound or formulation. Its scope emphasizes chemical innovation combined with therapeutic utility, typical of modern biotech patents. As part of a larger patent portfolio, it influences ongoing research, development, and commercialization strategies within the relevant therapeutic field.

The patent landscape indicates a robust position, with opportunities for licensing, partnerships, or litigation, depending on market dynamics and competitor activity. Its current legal standing underscores its potential as a key asset in the drug’s commercialization lifecycle.


Key Takeaways

  • Claims Strategy: The patent’s claims likely combine broad compound coverage with narrower sub-embodiments, providing flexibility and strength.
  • Patent Landscape Position: It serves as a critical legal barrier, with a well-structured family of related patents reinforcing market exclusivity.
  • Competitive Intelligence: Monitoring forward citations and third-party filings is essential for assessing ongoing patent validity and possible threats.
  • Lifecycle Considerations: Proactive management, including potential patent term extensions and continuation filings, can maximize commercial value.
  • Legal and Commercial Risks: Overlapping with other patents or generic challenges remain risks; strategic patent prosecution or litigation may be necessary to defend or enforce rights.

FAQs

1. What is the central innovation protected by U.S. Patent 7,662,365?
The patent covers a novel chemical compound or formulation with therapeutic utility, including methods of synthesis and use in specific medical conditions (details depend on exact claims).

2. How broad are the claims in U.S. Patent 7,662,365?
They are designed to encompass a class of compounds fitting specific structural parameters, with narrower dependent claims covering particular embodiments and derivatives.

3. What is the typical lifespan of this patent, and when will it expire?
Assuming standard 20-year term from filing and no supplementary extensions, it is expected to expire around 2029–2030, providing exclusivity during this period.

4. How does this patent fit within the overall drug patent landscape?
It likely forms part of a patent family covering various aspects of the drug, contributing to a dense patent thicket that limits generic competition.

5. What strategic considerations should companies keep in mind regarding this patent?
Monitoring related patents, planning around claim scope, and considering licensing or litigation are essential for maintaining market exclusivity and maximizing commercial value.


References

[1] U.S. Patent No. 7,662,365, issued 2010.

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Drugs Protected by US Patent 7,662,365

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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 7,662,365

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2002360284 ⤷  Get Started Free
Canada 2463938 ⤷  Get Started Free
Cyprus 1117608 ⤷  Get Started Free
Cyprus 1119906 ⤷  Get Started Free
Denmark 1436012 ⤷  Get Started Free
Denmark 2939696 ⤷  Get Started Free
European Patent Office 1436012 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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