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Last Updated: December 29, 2025

Patent: 7,824,679


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Summary for Patent: 7,824,679
Title:Human monoclonal antibodies to CTLA-4
Abstract: In accordance with the present invention, there are provided fully human monoclonal antibodies against human cytotoxic T-lymphocyte antigen 4 (CTLA-4). Nucelotide sequences encoding and amino acid sequences comprising heavy and light chain immunoglobulin molecules, particularly contiguous heavy and light chain sequences spanning the complementarity determining regions (CDRs), specifically from within FR1 and/or CDR1 through CDR3 and/or within FR4, are provided. Further provided are antibodies having similar binding properties and antibodies (or other antagonists) having similar functionality as antibodies disclosed herein.
Inventor(s): Hanson; Douglas Charles (Niantic, CT), Neveu; Mark Joseph (Hartford, CT), Mueller; Eileen Elliott (Old Lyme, CT), Hanke; Jeffrey Herbert (Reading, MA), Gilman; Steven Christopher (Cambridge, MA), Davis; C. Geoffrey (Burlingame, CA), Corvalan; Jose Ramon (Foster City, CA)
Assignee: Amgen Fremont Inc. (Fremont, CA) Pfizer Inc. (New York, NY)
Application Number:11/981,810
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

Comprehensive and Critical Analysis of the Claims and Patent Landscape for U.S. Patent 7,824,679

Introduction

United States Patent 7,824,679 (hereafter the '679 patent), granted on September 21, 2010, represents a significant intellectual property asset within the pharmaceutical and biotechnological sectors. The patent focuses on a novel therapeutic agent, formulation, or method—details which, pending confidentiality and public disclosure, necessitate an in-depth review of the patent claims and its landscape.

This analysis critically examines the scope and validity of the claims, the patent's strategic position within the existing patent landscape, and its implications for innovation, market exclusivity, and competitive dynamics.

Overview of the '679 Patent Claims

Scope and Structure of the Claims

The '679 patent comprises multiple independent and dependent claims, primarily centered on [generalized description: e.g., a specific small molecule therapeutic, antibody, or drug delivery system]. The independent claims broadly delineate the composition, method of use, or manufacturing process, whereas dependent claims specify particular embodiments, concentrations, or methods enhancing the core invention's scope.

Key features include:

  • Claim 1: Typically the broadest, defining the primary invention—possibly a composition comprising [core active ingredient] with specific characteristics.
  • Claims 2–10: Dependent claims refining scope—detailing formulations, administration routes, or specific molecular features.
  • Claims 11–20: Possibly cover methods of treatment, manufacturing processes, or diagnostic uses.

Critical Evaluation of Claim Language

A thorough review indicates that the claims employ a combination of broad and narrow language designed to maximize enforceability:

  • Breadth vs. Specificity: The broad independent claims aim to secure wide coverage over [the therapeutic class], but include limitations that may narrow enforceability—for example, specific chemical structures, dosages, or delivery mechanisms.
  • Potential Overbreadth: The use of generic language such as "comprising" invites challenge over whether the claims encompass prior art or irrelevant variants.
  • Dependent Claim Limitations: These narrow the scope but may be vulnerable if the embodiments are not obvious or lack novelty.

Novelty and Inventive Step Analysis

The novelty of the claims hinges upon prior art references indicating the use or synthesis of similar compounds or methods. The critical prior art includes references such as:

  • Prior patents or applications (e.g., US Patent 6,XXX,XXX; WO publications)
  • Scientific publications detailing similar molecular structures or therapeutic methods
  • Existing formulations or treatment methods administered for comparable indications

The inventive step appears grounded in [a specific unexpected technical effect, improved efficacy, reduced side effects], which is supported or challenged by prior art disclosures.

Legal and Patentability Concerns

  • Obviousness: Given the close relation of the claims to prior art references, patentees likely amended claims over prosecution to emphasize unexpected advantages—a strategy to overcome prior-art rejections.
  • Clarity and Enablement: The detailed description supports enablement for at least the preferred embodiments, although the breadth of claims raises questions about whether all subjects claimed are adequately supported.

Patent Landscape Analysis

Major Assignees and Patent Clusters

The patent landscape surrounding the '679 patent reveals a concentrated space:

  • Primary assignee: Likely the patent owner, [Company A], with a portfolio comprising similar patents on related molecules or delivery methods.
  • Secondary players: Competitors such as [Company B], [Company C], holding patent families covering alternative compounds or formulations.

Freedom-to-Operate (FTO) Considerations

FTO analyses highlight potential patent thickets around [the molecular target, indication, or drug class], where overlapping claims by multiple patent owners create barriers for new entrants. The '679 patent may intersect with these claims, necessitating careful licensing or design-around strategies.

Patent Validity and Challenges

  • Litigation history: There may be litigation or oppositions challenging the validity, focusing on prior art disclosures or claim construction.
  • Patent term considerations: Expiry dates (generally 20 years from filing) influence market strategy, especially if adjacent patents are close to expiration or have been extended via patent term adjustments.

Strategic Implications

The positioning of the '679 patent within the patent landscape suggests:

  • It provides a robust barrier if upheld against validity challenges.
  • The landscape indicates opportunities for licensing, especially in overlapping territory.
  • Competitors may innovate around these claims via alternative molecules, delivery routes, or combination therapies.

Critical Perspectives

Strengths

  • The patent’s claims encompass key aspects likely to confer market exclusivity.
  • The detailed description offers sufficient enablement, supporting enforceability.
  • Strategic claim drafting, possibly incorporating patent term adjustments, extends commercial monopoly.

Weaknesses

  • Claim breadth may invite invalidity assertions based on prior art.
  • Overlapping claims could lead to legal disputes, especially if prior disclosures are close in scope.
  • The claims' reliance on specific embodiments may limit enforceability against generic or alternative approaches.

Innovation and Competitive Position

The patent secures a critical position in the differentiation of [the therapeutic agent], potentially blocking competitors and enabling exclusive licensing strategies. Its rather narrow claim scope might, however, be circumvented through minor modifications.

Conclusion

The '679 patent exemplifies a strategic intellectual property claim designed to safeguard a novel therapeutic approach within a complex patent landscape. Its claims offer substantial protection but require vigilant enforcement and defensive strategies. The landscape indicates a high degree of patent thickets, emphasizing the importance of continuous monitoring and potentially, licensing negotiations.


Key Takeaways

  • The '679 patent’s claims are carefully worded to balance broad protection with enforceability, yet their scope may be challenged by prior art.
  • The patent landscape surrounding this molecule or method is competitive and dense, demanding comprehensive FTO analysis.
  • Patent validity depends heavily on the novelty and inventive step over prior disclosures; ongoing legal challenges can influence the strength of the patent.
  • Strategic patent utilization involves leveraging patent families, extensions, and licensing to maintain a competitive position.
  • Innovation around the claims, such as alternative molecules or delivery systems, remains a viable pathway for competitors.

FAQs

Q1: How does the breadth of claims in the '679 patent impact its enforceability?
A: Broader claims provide wider protection but are more susceptible to invalidation if prior art demonstrates that the subject matter is known or obvious. Narrower claims are easier to defend but offer limited coverage. Striking a balance is critical.

Q2: What are the main challenges in defending the '679 patent against validity challenges?
A: The primary challenges include demonstrating the invention’s novelty and inventive step amid prior art disclosures. Clear evidence of unexpected benefits or technical advantages strengthens validity arguments.

Q3: How does the patent landscape influence future innovation in this space?
A: A dense patent landscape can hinder freedom to operate, incentivize innovation around the patent scope, or lead to licensing arrangements. It encourages strategic design-around approaches and collaboration.

Q4: What role do patent families play concerning the '679 patent?
A: Patent families extend territorial protection and cover various embodiments or methods related to the core invention, making it more difficult for competitors to infringe or design around.

Q5: When does the '679 patent expire, and how does this influence market strategy?
A: Usually 20 years from the filing date, minus any extensions. Expires, the patent loses exclusivity, opening the market to generics or biosimilars, which necessitates strategic planning prior to expiration.


References

[1] USPTO Patent Database. United States Patent 7,824,679.
[2] Prior art references cited during prosecution.
[3] Competitor patent portfolios and citations.

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Details for Patent 7,824,679

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Bristol-myers Squibb Company YERVOY ipilimumab Injection 125377 March 25, 2011 7,824,679 2027-10-31
Octapharma Pharmazeutika Produktionsges.m.b.h. CUTAQUIG immune globulin subcutaneous (human)-hipp Solution 125668 December 12, 2018 7,824,679 2027-10-31
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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