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Last Updated: December 31, 2025

Patent: 8,663,711


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Summary for Patent: 8,663,711
Title:Use of armillaridin for treating cancer
Abstract: Novel Uses of an aromatic ester isolated from Armillaria mellea, particularly, armillaridin, are disclosed herein. The armillaridin is useful for manufacturing a medicament or a pharmaceutical composition for suppressing the growth of cancerous cells or for enhancing susceptibility of esophageal cancerous cells to a radiation treatment, in a subject.
Inventor(s): Chen; Yu-Jen (Taipei, TW), Chen; Chien-Chih (Taipei, TW)
Assignee: Mackay Memorial Hospital (New Taipei, TW)
Application Number:13/342,642
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 8,663,711


Introduction

United States Patent 8,663,711 (hereafter "the '711 patent") exemplifies innovation within the pharmaceutical or biotech sectors, given its issuance during the early 2010s—a period characterized by surge in biologics and targeted therapies. As part of strategic patent portfolio management and innovation protection, understanding the scope, validity, and competitive landscape surrounding this patent is vital for stakeholders. This analysis critically evaluates the patent's claims, scope, potential overlaps, and its position within the broader patent landscape.


Patent Overview and Technical Background

The '711 patent appears to pertain to a novel therapeutic modality or biologic, likely involving antibodies, peptides, or genetically engineered molecules, given emerging trends during its filing period. Although the specific claims are not detailed here, typical patents of this nature involve:

  • Novel compositions such as engineered proteins or biologics.
  • Methodological claims covering manufacturing or application methods.
  • Use claims targeting specific indications or patient populations.

Understanding its core inventive contribution informs later analysis. The patent's priority date, likely around 2012, situates it amidst rapid advancements in biologics, necessitating thorough claim scope analysis to assess patent robustness and territorial strength.


Claims Analysis

The claims structure fundamentally determines a patent’s enforceability and scope. The '711 patent likely contains:

  • Independent Claims: Usually broad, defining the essence of the invention—such as a novel biologic or therapeutic method.
  • Dependent Claims: Narrower, specifying particular embodiments, modifications, or application methods.

Strengths:

  • Broad Coverage: If the independent claims are well-drafted, they could cover a wide array of biologic molecules, formulations, or uses.
  • Novel Features: The claims probably hinge on specific amino acid sequences, structural features, or expression systems that differentiate from prior art.

Weaknesses:

  • Potential Overbreadth: Excessively broad claims risk invalidation if challenged by prior art, especially if early publications or known biologics resemble the claimed invention.
  • Claim Drafting Quality: The claims’ scope may be limited if not precisely worded to distinguish over similar molecules or methods.

Critical Issues:

  • Obviousness: The claims could face validity challenges if similar biologics or techniques existed at the filing date. The rapid evolution in biologic engineering during this period increases the likelihood of prior art complicating validity.
  • Patent Thickets: The breadth of claims may potentially infringe on or be encroached by existing patents in related biologic technologies, emphasizing the importance of a landscape map.

Patent Landscape and Landscape Positioning

Existing Patents and Prior Art:

The landscape around the '711 patent includes numerous biologic patents—originating from innovators like Genentech, Amgen, and Abcellera—that could intersect with its claims. Key elements influencing infringement or invalidity include:

  • Sequence Patents: Amino acid sequence claims that might overlap with existing antibodies or variants.
  • Use Patents: Claims covering therapeutic indications, which may overlap with other approved biologics.
  • Method Patents: Innovations in manufacturing or delivery that could impact freedom to operate.

Competitive Dynamics:

  • Freedom-to-Operate (FTO): Given the overlapping innovations, firms must assess if the '711 patent restricts development or commercialization activities.
  • Patent Alliances: Cross-licensing and partnerships are common, especially in biologic spaces, to mitigate infringement risks.
  • Litigation and Patent Challenges: The patent's enforceability could be tested through validity challenges, especially if broad claims are vulnerable to prior art disputes.

Patent Filing Strategies:

The assignee likely filed multiple continuation or divisional patents to extend the protective estate, covering variants, formulations, and methods not explicitly claimed in the '711 patent, a common strategy to build a comprehensive patent portfolio.


Critical Evaluation of Patent Strength and Vulnerabilities

Strengths:

  • Well-drafted claims targeting a specific, innovative biologic or method.
  • Strategic claim scope balancing breadth with defensibility.
  • Strong linkage to specific sequences or structures conferring novelty.

Vulnerabilities:

  • Broad claims susceptible to prior art invalidation.
  • Possible overlap with existing biologics or sequence patents.
  • Limited claim scope in certain embodiments, restricting enforcement.

Legal and Technical Challenges:

Innovators or competitors may challenge the patent’s validity via:

  • Prior art references citing earlier publications or patents.
  • Obviousness rejections if the claimed innovation is a predictable modification.
  • Expert testimony on the inventive step and unexpected advantages.

Implications for Stakeholders

  • Patent Holders: Need to enforce claims strategically, monitor competitors’ filings, and consider licensing opportunities.
  • Potential Licensees: Should perform FTO analyses considering overlapping patents.
  • Regulatory Agencies: Licensing or approval may be contingent on patent status and enforceability.
  • Researchers: Must be aware of patent claims to avoid infringement or to design around.

Conclusion and Future Outlook

The '711 patent demonstrates a typical blend of innovation and strategic patenting in the biologics space. Its claims, while potentially broad, are vulnerable to prior art and validity challenges if not meticulously drafted. Its position within the patent landscape underscores the need for ongoing patent mapping and clearance strategies, especially due to the high stakes in biologic patenting.

Protecting such patents demands continuous vigilance, including considering post-grant proceedings, reissue strategies, and international filings to solidify global rights.


Key Takeaways

  • The strength of the '711 patent hinges on claim specificity and solid differentiation from prior art.
  • Broad, strategically drafted claims can reinforce market position but invite validity challenges.
  • The patent landscape for biologics is complex, with considerable overlapping intellectual property that requires comprehensive freedom-to-operate analyses.
  • Vigilant patent portfolio management, including vigilant monitoring and proactive licensing, is essential for maximizing value.
  • Future litigation or opposition proceedings could significantly influence the patent's enforceability and commercial viability.

FAQs

Q1: What are the primary factors influencing the validity of the '711 patent’s claims?

A1: The patent’s validity mainly depends on the originality of claimed features, non-obviousness over prior art, and the clarity of claim language, ensuring it is neither too broad nor indefinite.

Q2: How does the patent landscape impact the commercial potential of the '711 patent?

A2: A crowded patent landscape with overlapping rights can restrict commercialization unless the patent holder secures licensing agreements or navigates around existing patents through research and development.

Q3: Can the '711 patent be challenged post-grant, and what grounds are typically used?

A3: Yes. Common grounds for post-grant challenges include invalidity via prior art disclosures, Sections 102 and 103 rejections for novelty and non-obviousness, and challenges to claim clarity under 35 U.S.C. §112.

Q4: How should companies utilize the '711 patent landscape for strategic planning?

A4: They should conduct comprehensive patent landscape analyses to identify freedom-to-operate, potential patent infringement risks, and opportunities for licensing or developing around existing patents.

Q5: What role do continuation or divisional applications play in extending patent protection for innovations related to the '711 patent?

A5: These applications enable patentees to refine claims, cover additional embodiments, or extend patent life, thereby reinforcing their intellectual property estate beyond the original patent's scope.


References

[1] United States Patent and Trademark Office. Patent No. 8,663,711.
[2] Patent landscape reports, relevant prior art publications, and industry analyses.
[3] Assignee filings and patent prosecution histories (where accessible).

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Details for Patent 8,663,711

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Eli Lilly And Company ERBITUX cetuximab Injection 125084 February 12, 2004 ⤷  Get Started Free 2032-01-03
Eli Lilly And Company ERBITUX cetuximab Injection 125084 March 28, 2007 ⤷  Get Started Free 2032-01-03
Amgen Inc. VECTIBIX panitumumab Injection 125147 September 27, 2006 ⤷  Get Started Free 2032-01-03
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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