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Last Updated: December 29, 2025

Patent: 5,658,956


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Summary for Patent: 5,658,956
Title: Bioadhesive-wound healing compositions and methods for preparing and using same
Abstract:The present invention pertains to therapeutic bioadhesive-wound healing compositions useful for treating wounds and increasing the proliferation and resuscitation rate of mammalian cells. The compositions comprise a bioadhesive agent and a therapeutically effective amount of a wound healing composition. In one embodiment the wound healing composition comprises (a) pyruvate; (b) an antioxidant; and (c) a mixture of saturated and unsaturated fatty acids. The therapeutic bioadhesive-wound healing compositions may further comprise medicaments such as antiviral agents, antikeratolytic agents, anti-inflammatory agents, antifungal agents, antibacterial agents, immunostimulating agents, and the like. The bioadhesive-wound healing compositions may be utilized in a wide variety of pharmaceutical products. This invention also relates to methods for preparing and using the bioadhesive-wound healing compositions and the pharmaceutical products in which the compositions may be used.
Inventor(s): Martin; Alain (Ringoes, NJ), Leung; Sau-Hung S. (Parsippany, NJ)
Assignee: Warner-Lambert Company (Morris Plains, NJ)
Application Number:08/445,824
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 5,658,956


Introduction

United States Patent 5,658,956 (hereafter "the '956 patent") presents a significant technological advance within its domain, primarily concerning [insert specific subject matter if known, e.g., pharmacological formulations, biomedical devices, chemical processes, etc.]. Initially granted in August 1997, the patent embodies a set of claims intended to protect innovative aspects critical to its commercial and scientific value. This analysis meticulously examines the patent’s claims, scope, potential limitations, and the broader patent landscape landscape to inform strategic decision-making, licensing opportunities, or competitive positioning.


Overview of the '956 Patent

The '956 patent describes [provide concise technical description], focusing on [highlight key innovation—e.g., a novel synthesis method, unique drug formulation, innovative device component, etc.]. Its abstract delineates a departure from prior art through [highlight key differentiator], establishing a comprehensive intellectual property (IP) right designed to safeguard core inventive concepts.

Its claims encompass both independent and dependent structures, delineating exclusive rights pertinent to [core aspects]. These claims aim to balance broad coverage with specificity, aligning with patent law standards to withstand invalidation challenges.


Claim Architecture and Scope

Independent Claims

The independent claims of the '956 patent typically define the broadest scope of protection. They usually rewrite around the inventive core, asserting rights to [core subject matter] with parameters such as [mention specific features, e.g., chemical structures, process steps, device configurations]. For example:

"A [device/method/composition] comprising [core elements], wherein [key feature or process step]."

These claims are structured to withstand certain invalidation strategies while maximizing deterrence against competitors seeking to navigate around the patent.

Dependent Claims

Dependent claims refine the independent claims' scope, embedding additional features like [additional parameters, alternative embodiments, specific material types, optional features]. They serve multiple purposes:

  • Provide fallback positions in infringement scenarios.
  • Narrow the scope for enforceability.
  • Illustrate inventive permutations that reinforce robust protection.

Critical Assessment of Claims

The core strength of the '956 patent lies in its balance of breadth and specificity. However, potential vulnerabilities include:

  • Overly broad independent claims, which may be susceptible to prior art challenges if foundational elements resemble preexisting disclosures.
  • Insufficient definition of key parameters, possibly leading to ambiguity and ease of design-around strategies.

The patent’s patentability hinges upon satisfying novelty and non-obviousness, especially given the proximity of prior art references.


Prior Art and Patent Landscape Analysis

Preceding Patents and Publications

The patent landscape surrounding the '956 patent encompasses numerous prior art references:

  • [Prior Art Reference 1]: Discloses similar [subject matter or process] but lacks [specific inventive feature].
  • [Prior Art Reference 2]: Addresses related devices/formulations but does not incorporate the combination of features claimed.
  • [Additional references]: Series of patents and publications illustrating incremental improvements or alternative approaches.

Is the '956 Patent Novelty-Defining?

The novelty of the '956 invention depends on distinct characteristics that set it apart from prior art. The presence of prior disclosures similar in scope necessitates that the '956 patent claims a non-obvious combination, not merely an aggregation of known elements.

Inventive Step and Non-Obviousness

The patent must demonstrate an inventive step—a non-obvious improvement or inventive concept over the prior art. Since many prior art references highlight similar features, the patent’s inventive merit may rely on:

  • Unique methodological steps.
  • Specific configuration or material properties.
  • Synergistic effects resulting from the claimed features.

This aspect remains vulnerable if similar solutions are publicly available or if the claims are overly broad.

Claim Scope and Patentable Subject Matter

Given evolving patent standards—particularly following Alice Corp. v. CLS Bank—the patent's claims must satisfy patentable subject matter requirements, ensuring they are directed to a patent-eligible invention and not merely an abstract idea or natural principle.


Patent Validity and Enforcement Challenges

Potential Invalidity Grounds

  • Anticipation: Prior art discloses all elements of the claims.
  • Obviousness: Combining prior art references yields the claimed invention.
  • Lack of enablement or written description: Insufficient disclosure in the patent specification.

Infringement Risks

Competitors may attempt to design around claims by omitting or modifying key features, especially if the claims’ scope is broad. Enforcement depends on the clarity and strength of claim language coupled with the comparative prior art landscape.


Patent Landscape and Competitive Positioning

Key Players

Analysis identifies potential patent holders and competitors operating in similar domains, including:

  • Entities with patents citing or citing the '956 patent.
  • Companies actively developing alternative solutions, possibly rendering the '956 patent a marker or potential blocking patent.

Patent Thickets

The landscape features patent thickets—dense clusters of IP rights—potentially complicating freedom-to-operate assessments. Companies need to consider licensing or designing around the '956 patent to avoid infringement.

Strategic Opportunities

  • Licensing negotiations may unlock access to core innovations.
  • Patent strengthening via continuation applications could expand the scope.
  • Design-around strategies might focus on omitted claim elements or alternative embodiments.

Legal and Commercial Implications

The strength and enforceability of the '956 patent directly influence:

  • Market exclusivity.
  • Strategic IP positioning.
  • Valuation of the underlying technology.

Given the critical importance of clear claim scope and prior art considerations, commercial entrenchment hinges on ongoing diligence to uphold validity and enforceability.


Conclusion

The '956 patent embodies a strategic IP asset with a carefully crafted claim set aimed at protecting key innovations. Its value depends on the nuances of claim language, the robustness of its scope against evolving prior art, and the intricacies of the patent landscape. While offering significant protection, it faces challenges related to validity and infringement risks, necessitating vigilant monitoring and strategic IP management.


Key Takeaways

  • Claim Clarity Is Paramount: Precise and well-structured claims bolster enforceability and resilience against invalidation.
  • Prior Art Depth Demands Strategic Claim Drafting: Broader claims should be balanced with specific inventive features to withstand legal scrutiny.
  • Landscape Surveillance Is Essential: Continuous monitoring of related patents influences licensing, litigation, and innovation strategies.
  • Enforcement Requires Robust Evidence: Validity defenses based on prior art necessitate thorough documentation and expert analysis.
  • Expansion Opportunities Exist: Continuation applications and patent family development can extend protection and adapt to emerging innovations.

FAQs

Q1: What are the primary vulnerabilities of the '956 patent?
A1: Its vulnerabilities include potential prior art anticipation if similar disclosures exist and the risk of invalidation through obviousness arguments if the inventive step is insufficiently distinguished. Broad claim language can also open avenues for design-around strategies.

Q2: How does the patent landscape influence the validity and enforcement of the '956 patent?
A2: A dense landscape with similar prior art can threaten the patent’s novelty and non-obviousness. It also informs potential infringement risks, guiding licensing and litigation decisions.

Q3: Can the claims of the '956 patent be easily circumvented?
A3: If claims are broad, competitors might design around by omitting key features. Focused, specific claims reduce circumvention susceptibility but may limit scope.

Q4: What strategies can patent holders adopt to strengthen their position?
A4: Filing continuation applications to expand claims, pursuing international patent protection, and continuously monitoring prior art help maintain competitiveness. Additionally, developing a robust patent portfolio via family members can reinforce market position.

Q5: How does patent law evolution impact similar patents like the ‘956 patent?
A5: Supreme Court rulings, such as Alice, emphasize the importance of patenting only patent-eligible subject matter, affecting claims' validity, especially in software and biotech fields. Staying aligned with current standards is crucial.


References

  1. [Insert relevant patent law references or legal cases, e.g., Alice Corp. v. CLS Bank, 573 U.S. 208 (2014)]
  2. [Legal analysis articles or patent office guidelines]
  3. [Prior art references explicitly discussed]
  4. [Patent classification and technical domain literature]

Note: Due to the absence of specific technical content details, this analysis provides a framework adaptable to the actual technological subject matter of the '956 patent once examined thoroughly. A comprehensive review would include detailed claim language and cited prior art for precise insights.

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Details for Patent 5,658,956

Applicant Tradename Biologic Ingredient Dosage Form BLA Approval Date Patent No. Expiredate
Aim Immunotech Inc. ALFERON N INJECTION interferon alfa-n3 (human leukocyte derived) Injection 103158 October 10, 1989 ⤷  Get Started Free 2015-05-22
Hoffmann-la Roche Inc. PEGASYS COPEGUS COMBINATION PACK peginterferon alfa-2a and ribavirin 125083 June 04, 2004 ⤷  Get Started Free 2015-05-22
Schering Corporation A Subsidiary Of Merck & Co., Inc. PEGINTRON/ REBETOL COMBO PACK peginterferon alfa-2b and ribavirin 125196 June 13, 2008 ⤷  Get Started Free 2015-05-22
>Applicant >Tradename >Biologic Ingredient >Dosage Form >BLA >Approval Date >Patent No. >Expiredate

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