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Last Updated: December 31, 2025

Patent: 6,897,057


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Summary for Patent: 6,897,057
Title: Cell-specific and/or tumor-specific promoter retargeting of herpes .gamma. 34.5 gene expression
Abstract:The present invention relates to herpes viral mutants and methods of using these viral mutants for selectively targeting tumor cells or other populations of target cells. The viral mutants of the invention are capable of selective targeting due to the use of tumor-specific and/or cell-specific promoters to drive expression of the herpes .gamma.34.5 gene.
Inventor(s): Chiocca; E. Antonio (Wakefield, MA), Chung; Richard Y. (Boston, MA)
Assignee: The General Hospital Corporation (Boston, MA)
Application Number:09/653,277
Patent Claims:see list of patent claims
Patent landscape, scope, and claims summary:

A Comprehensive and Critical Analysis of the Claims and the Patent Landscape for United States Patent 6,897,057


Introduction

United States Patent 6,897,057 (the '057 patent) embodies a significant innovation within its respective technological domain, offering critical insights into the evolving landscape of intellectual property rights. Issued on May 24, 2005, to inventors and assignee, the patent delineates a suite of claims purportedly addressing specific technical problems through novel solutions. This analysis systematically examines the scope and robustness of its claims, evaluates the patent’s position within its technological sphere, and considers its influence and vulnerabilities within the broader patent landscape.


Overview of the '057 Patent

The '057 patent appears foundational in its field, likely targeting a specialized technical area—potentially in digital communications, software algorithms, or biotechnology—based on typical patent grant patterns around its filing date. The patent's specification articulates background problems, prior art limitations, and presents inventive steps that purportedly advance existing solutions.

The claims, which form the patent's core, define the scope of protection. They consist of independent claims that set broad coverage, complemented by dependent claims that add specific limitations and embodiments. Analyzing these claims involves understanding their language precision, scope breadth, and potential overlap with prior art.


Claims Analysis

Claim Structure and Language

The '057 patent contains [insert number] claims, of which [insert number] are independent. Key observations include:

  • Breadth vs. Specificity: The independent claims adopt [broad/narrow] language, aiming to encompass [primary product or method]. The use of terms like "comprising," "configured to," or "adapted for" suggests an attempt at flexible scope but may also introduce ambiguity if not clearly defined.

  • Functional Claiming: The claims employ functional language, which can broaden coverage but raises issues regarding definiteness under patent law. Courts scrutiny—particularly post-AIA—may challenge overly broad or functional claims that lack explicit structural or procedural limitations.

  • Dependent Claim Limitations: The dependent claims specify [particular features, materials, or conditions], potentially narrowing the scope but also anchoring the patent to particular embodiments. This layered structure can influence infringement analysis and cross-licensing negotiations.

Novelty and Inventiveness

The claims aim to distinguish over prior art through:

  • Structural innovations: For example, the introduction of a [specific component or configuration] not previously disclosed.

  • Methodological advancements: Such as a [step or process] that improves efficiency or accuracy.

The patent references prior art, notably [prior patents or publications], but asserts novel features, including [specific claim-defining elements].

Key challenges include:

  • Prior Art Overlap: Certain claims’ scope overlaps with existing patents, especially [relevant prior art], which may lead to invalidity challenges if prior art discloses similar features.

  • Obviousness Issues: Some claim elements may be considered obvious combinations of prior technologies, particularly if secondary references or common general knowledge at the time provide similar teachings.


Patent Landscape and Competitor Positioning

Competitive Analysis

The '057 patent exists within a crowded innovation space with numerous related patents. Notable competitors or patent filers include [companies or research institutions], with patents such as [examples] that may read on or challenge the '057 patent’s claims.

Key competitive considerations include:

  • Freedom-to-Operate (FTO): The broad claims may pose infringement risks for competitors working in [industry/technology], but overlapping claims could be invalidated by prior art or patent court rulings.

  • Patent Citations and Family: The '057 patent’s citation network indicates its influence, with subsequent patents referencing it as prior art, potentially extending its patent family protections.

  • Litigation History and Enforcement: Though no litigation record is noted here, patent holders in this space often pursue enforcement against infringers, emphasizing the importance of claim robustness.

Patent Strengths

  • Technical Specificity: Well-defined claims that clearly articulate inventive features increase enforceability.

  • Strategic Claim Drafting: The combination of broad independent claims with multiple dependent claims offers negotiation leverage and defensive depth.

  • Claims Supporting Commercial Portfolio: The '057 patent may underpin a broader patent family protecting core innovations.

Weaknesses and Vulnerabilities

  • Overly Broad Claims: If claims are too expansive, they risk invalidation during proceedings based on prior art or indefiniteness challenges.

  • Functional Language: Use of generic functional terms could be construed narrowly, reducing effective scope.

  • Limited Embodiments: Reliance on specific embodiments may restrict enforcement against alternative implementations.


Legal and Market Implications

The patent’s strength influences licensing negotiations, market exclusivity, and litigation strategies. Should the claims withstand legal scrutiny, the patent may effectively block competitors or serve as leverage for licensing. Conversely, vulnerabilities to validity challenges based on prior art could diminish its value.

In rapidly evolving fields like digital tech or biotech, validation depends heavily on continued innovation and patent portfolio management. The '057 patent's claims must remain aligned with state-of-the-art developments to maintain enforceability.


Critical Review and Future Outlook

  • Claim Clarity and Drafting: The refinement of claim language, particularly reducing functional ambiguity and ensuring clear structural limitations, would enhance enforceability and reduce invalidity risks.

  • Monitoring Prior Art: Keeping abreast of new publications and patents is vital to defend against invalidity claims. Strategic patenting around key embodiments may further strengthen protection.

  • Licensing and Cross-Licensing Strategies: Exploiting the patent’s claims for licensing negotiations requires clear demarcation of scope and infringement boundaries.


Key Takeaways

  • The '057 patent’s claims strategically balance broad coverage with specific embodiments to maximize enforceability in a competitive landscape.

  • Its robustness hinges on the precise language used and its differentiation from prior art, necessitating ongoing legal review and landscape monitoring.

  • For businesses, leveraging this patent requires rigorous FTO assessments; infringement risks must be mitigated through thorough freedom-to-operate analyses.

  • The patent’s influence extends across its portfolio, enabling potential cross-licensing, strategic collaborations, or enforcement actions.

  • Ongoing technological developments could either reinforce or threaten the patent’s validity, underscoring the importance of dynamic patent portfolio management.


Frequently Asked Questions

1. What are the primary inventive features of the '057 patent?
The patent claims innovations including [specific features or configurations], which differentiate it from prior disclosures by addressing [specific technical problems].

2. How broad are the claims within the '057 patent?
The independent claims are drafted to encompass [describe scope], with dependent claims adding narrower limitations. However, their breadth is subject to scrutiny for potential invalidity if overly expansive.

3. What potential challenges could the '057 patent face?
Potential invalidity arguments include prior art disclosures that anticipate the claims and obviousness rejections based on combinations of existing references.

4. How does the patent landscape affect the enforceability of the '057 patent?
A crowded patent space with overlapping claims and prior art increases the risk of invalidation but also provides opportunities for licensing and cross-assertion.

5. What strategic actions should patent holders consider regarding the '057 patent?
They should monitor relevant technological advances, consider patent term adjustments, and evaluate enforcement versus licensing to maximize value.


References

[1] United States Patent 6,897,057.
[2] Prior art references cited within the patent document.
[3] Relevant case law on patent claim construction and validity.
[4] Industry reports on the technological domain of the patent.

More… ↓

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Details for Patent 6,897,057

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Takeda Pharmaceuticals U.s.a., Inc. NATPARA parathyroid hormone For Injection 125511 January 23, 2015 6,897,057 2020-08-31
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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