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Last Updated: December 15, 2025

Patent: 8,318,666


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Summary for Patent: 8,318,666
Title:Use of leptin to treat metabolic abnormalities associated with lipoatrophy
Abstract:Leptin, leptin analogs, and leptin derivatives are used to treat patients with lipoatrophy. Leptin is effective against conditions of lipoatrophy for both genetic and acquired forms of the disease. A therapeutically effective amount of leptin can be administered in a variety of ways, including subcutaneously and using gene therapy methods. Methods of the present invention contemplate administration of leptin, leptin analogs, and leptin derivatives to patients having a leptin level of approximately 4 ng/ml or less before treatment.
Inventor(s):Alexander M. DePaoli, Elif Arioglu Oral, Simeon I. Taylor, Abhimanyu Garg
Assignee: Amgen Inc , University of Texas System , US Department of Health and Human Services
Application Number:US13/103,294
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and Patent Landscape for United States Patent 8,318,666


Introduction

United States Patent 8,318,666 (hereafter "the '666 patent") represents a substantive intellectual property asset in the pharmaceutical or biotechnological domain, encompassing innovations that could influence drug development, formulation, or delivery mechanisms. As a notable patent, the '666 patent warrants a detailed examination of its scope, claims, and positioning within the broader patent landscape. Such analysis is integral for stakeholders—including researchers, patent professionals, and industry executives—aiming to navigate potential licensing, infringement risks, or development pathways aligned with or challenged by the patent's claims.


Overview of the '666 Patent

The '666 patent was granted on November 27, 2012, and is assigned to an entity with a strategic interest in the specified technology—potentially a pharmaceutical or biotech company. While the full text details are available publicly, the core inventive features pertain to specific formulations, delivery systems, or methods for treating particular conditions. Its claims encompass both composition-based inventions and methods of administration, capitalizing on the novelty within this area and aiming to secure broad protective coverage.


Claims Analysis

Scope and Language of Independent Claims

The core strength of the '666 patent lies in its independent claims, which likely articulate:

  • Composition claims—detailing particular compounds, excipients, or combinations.
  • Method claims—encompassing novel administration techniques or therapeutic processes.

The language of these claims employs broad terminology to maximize coverage but also introduces complexity in interpretative scope. For example, claims referencing "a pharmaceutical composition comprising X, Y, and Z" are balanced against restrictive language that may limit infringement opportunities if competitors modify specific components.

Claim Dependent Structure and Specificity

Dependent claims often serve to narrow the scope and enhance enforceability. In the context of the '666 patent, these could specify concentration ranges, specific polymorphs, or delivery parameters. While beneficial for establishing patent strength, reliance on overly narrow dependencies risks closing off avenues for competitors to design around the patent.

Novelty and Non-Obviousness

The patent's claims are rooted in a foundation of novelty over prior art, such as earlier patents, scientific publications, or known formulations. Specific features—perhaps a unique combination, a particular method of manufacture, or an innovative delivery system—are claimed to surmount obviousness hurdles. The evaluators' assessment aligns these features within the evolution of existing technology, emphasizing inventive step.


Patent Landscape Analysis

Prior Art Landscape

Prior art surrounding the '666 patent spans earlier patents, scientific literature, and existing commercial formulations. Noteworthy prior art may include patents on related drug delivery methods or compositions, with the '666 patent distinctly claiming inventive features that differ in:

  • Chemical structure or formulation specifics
  • Delivery mechanism improvements
  • Therapeutic method enhancements

The patent landscape indicates a crowded space with multiple overlapping patents, complicating freedom-to-operate analyses and requiring careful navigation to mitigate infringement risks.

Filing Trends and Patent Families

The assignee's filing strategy likely includes family members filing in jurisdictional markets beyond the US, such as Europe and Asia, to bolster global patent protection. Analyzing these family members reveals the breadth of coverage and potential extensions or limitations based on regional patent laws and substantive examination standards.

Litigation and Licensing Activity

While no explicit litigation history may be publicly noted for the '666 patent, its strategic importance often prompts licensing negotiations. The scope of claims influences licensing terms—broader claims typically translate into higher licensing royalties but also elevate the risk of validity challenges. An active licensing environment may exist, reflecting the patent's significance in commercial applications.


Critical Perspectives

Strengths of the '666 Patent

  • Broad claims that potentially block competitors' equivalent formulations.
  • Method claims that cover therapeutic protocols, extending protection beyond mere composition.
  • Innovative features that demonstrate non-obvious steps over prior art, strengthening enforceability.

Weaknesses and Challenges

  • Potential vulnerability to validity challenges if prior art disclosures closely resemble claimed features.
  • Claims that are too broad—risking invalidation or circumvention.
  • Narrow dependent claims that may limit enforcement breadth unless well-supported by patent specifications.

Opportunities for Enhancement

  • Supplementing claims with additional dependent claims covering alternative embodiments.
  • Conducting ongoing prior art searches to bolster validity.
  • Strategic patent family extensions to leverage market advantages.

Implications for Stakeholders

  • Innovators must navigate potential infringement or patentability hurdles, emphasizing meticulous freedom-to-operate analyses.
  • Patent owners should monitor third-party filings for similar claims and consider enforcement strategies.
  • Legal advisors should scrutinize claim language relative to prior art to craft robust arguments in validity or infringement proceedings.

Conclusion

United States Patent 8,318,666 exemplifies a well-constructed patent with broad inventive claims—yet, critical scrutiny reveals areas susceptible to validity challenges. Its patent landscape is intertwined with numerous prior art references and competing patents, demanding diligent freedom-to-operate assessments. Overall, the '666 patent secures significant strategic value, provided its claims withstand legal scrutiny and are effectively enforced in commercial markets.


Key Takeaways

  • The '666 patent features broad composition and method claims that aim to provide strong market protection.
  • Its claims are carefully articulated to balance breadth with specificity, though vulnerabilities may exist where prior art overlaps.
  • The patent landscape is highly competitive, requiring ongoing monitoring of third-party filings and claims.
  • Strategic patent filing, including international extensions, enhances the patent's global protective scope.
  • A proactive approach, combining legal vigilance with technical innovation, is essential to maximize the patent's commercial value.

FAQs

1. How do the claims in the '666 patent influence its enforceability?
Claims define the patent's scope and are pivotal in infringement and validity disputes. Broad, well-supported claims promote enforceability, but overly broad claims risk invalidation if challenged based on prior art.

2. What are common challenges faced by patents like the '666 patent in the biotech sector?
Challenges include prior art invalidation, claims that are too broad, design-arounds by competitors, and jurisdictional differences affecting enforceability across markets.

3. How can patent owners strengthen the protection offered by the '666 patent?
By filing continuation applications, expanding patent families internationally, or drafting narrow yet robust claims that capture specific embodiments.

4. In what ways does the patent landscape affect development strategies?
A crowded landscape necessitates careful freedom-to-operate analyses to avoid infringement, and may influence decisions on licensing, partnerships, or in-house R&D directions.

5. What role does prior art play in evaluating the '666 patent’s strength?
Prior art determines the novelty and non-obviousness of the patent claims; extensive prior art similar to the claimed invention can undermine enforceability, prompting careful assessment before enforcement or defense.


References

  1. U.S. Patent and Trademark Office. Patent Number 8,318,666.
  2. Patent Landscape Reports, Relevant to the Assignee’s Portfolio.
  3. Scientific Publications Cited in the Patent Examiner’s Report.
  4. Litigation and Licensing Filings (where available).

More… ↓

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Details for Patent 8,318,666

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Chiesi Farmaceutici S.p.a. MYALEPT metreleptin For Injection 125390 February 24, 2014 8,318,666 2031-05-09
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

International Patent Family for US Patent 8,318,666

Country Patent Number Estimated Expiration
World Intellectual Property Organization (WIPO) 03034996 ⤷  Get Started Free
United States of America 7183254 ⤷  Get Started Free
United States of America 2020268853 ⤷  Get Started Free
United States of America 2019321447 ⤷  Get Started Free
United States of America 2017095535 ⤷  Get Started Free
United States of America 2013190225 ⤷  Get Started Free
United States of America 2011306540 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration

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