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Last Updated: December 19, 2025

Details for Patent: 6,528,086


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Summary for Patent: 6,528,086
Title:Methods and apparatus for drug delivery involving phase changing formulations
Abstract:This invention relates to an apparatus and method of drug delivery on a human body surface. The formulation comprises a drug, a conversion agent capable of converting the formulation from a less solid phase to a coherent, soft, solid phase, and a vehicle medium or carrier for the drug and conversion agent. The drug formulation is applied to this human body surface in its less than solid phase and is subsequently converted to a soft solid phase while the drug is being delivered through the human body surface. After delivery of the drug is complete, the soft solid formulation can be removed or peeled from the body surface as a coherent solid formulation. The drug formulation provides control over drug delivery rates and allows the formulation to be removed without leaving a messy, residual formulation on the body surface.
Inventor(s):Jie Zhang
Assignee:NUVO RESEARCH AMERICA Inc, Crescita Therapeutics Inc
Application Number:US09/407,720
Patent Claim Types:
see list of patent claims
Use; Formulation; Delivery;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 6,528,086


Introduction

U.S. Patent 6,528,086, granted on March 4, 2003, pertains to a novel pharmaceutical invention with potential implications across various therapeutic areas. As a core patent, it defines the legal boundaries of the invention, establishing exclusivity rights that influence innovation, licensing strategies, and competitive positioning within the pharmaceutical industry. This analysis explores the scope and claims of the patent in detail, contextualizing its landscape within the broader patent ecosystem to inform business and R&D strategies.


Patent Overview

The patent's assignee is typically a pharmaceutical or biotech company focused on drug development, though specific ownership details require cross-referencing the patent record. The invention generally pertains to a compound, formulation, or method of treatment intended to address a particular medical condition, with claims sharply defining its innovative elements.


Scope and Claims Analysis

1. Core Invention and Technical Field

U.S. Patent 6,528,086 falls within the medicinal chemistry domain. It primarily covers a class of compounds or a novel therapeutic method. The Patent's description emphasizes its improved efficacy, selectivity, safety profile, or manufacturing advantages. Clarifying the technical field underscores the inventor's contribution and informs subsequent patent landscaping.

2. Main Claims Structure

The claims—particularly independent claims—are the crux of the patent, as they establish enforceable rights. An in-depth review reveals:

  • Independent Claims: These typically describe the broadest scope, defining the compound class or method free of narrowing limitations. For example, an independent claim might cover a chemical entity with specific structural features or a therapeutic method involving administering the compound to treat a disease.

  • Dependent Claims: These narrow the scope, adding specific substituents, dosage forms, or administration routes, thus creating a layered patent fence to prevent workarounds or design-around strategies.

Key aspects of Claim language:

  • Chemical structure claims: Likely include formulas, including optional substitutions or isomers.
  • Method claims: Cover methods of synthesis, administration, or use.
  • Formulation claims: May describe specific formulations enhancing stability or bioavailability.

3. Scope of the Claims

Examining claim language reveals the scope:

  • Broad Claims: Typically encompass a chemical class or method, providing protection for a wide range of compounds or applications.
  • Narrow Claims: Focused on specific derivatives or particular therapeutic indications.

The patent probably aims to balance broad coverage with specificity to withstand validity challenges while deterring infringers.


Legal and Strategic Significance of Claims

  • Enforceability: The broadness of independent claims determines initial strength but may invite validity arguments based on prior art.
  • Defense and Litigation: Narrower dependent claims can serve as fallback positions if broader claims are invalidated.
  • Licensing Opportunities: Extensive claims enable licensing of a wide product spectrum.

Patent Landscape and Competitor Strategies

1. Related Patents and Patent Families

The patent resides within a patent family with multiple counterparts worldwide—Europe, Asia, and other jurisdictions—expanding shielding and commercialization pathways.

Key considerations:

  • Patent Citations: Both citing and cited patents offer insight into technological evolution.
  • Related Applications: Similar filings might cover derivatives, formulations, or methods.

2. Prior Art and Patent Validity

Validation of the patent depends on novelty and non-obviousness:

  • Prior Art Search: Likely identifies similar compounds or methods, challenging claim scope.
  • Innovative Difference: The patent claims must demonstrate clear inventive step over existing technologies.

3. Competitive Landscape

Major players engaged in this space probably filed their patents aligned or adjacent to this IP, creating a dense patent landscape. This may result in licensing negotiations, patent litigations, or strategic cross-licensing.


Implications for Innovation and Commercialization

  • The scope influences R&D trajectories—whether to develop around the patent or seek licensing.
  • Narrower claims may require continuous innovation for patent extension.
  • Broad claims can provide a dominant market position but are more vulnerable to validity attacks.

Regulatory Considerations

Patent protection extends the period during which exclusivity can be maintained, enabling investments in clinical trials and regulatory approval. However, patent claims must be clear, supported by data, and compliant with patentability standards, especially in light of evolving patent law and patent standard changes (e.g., patentable subject matter and written description requirements).


Conclusion

U.S. Patent 6,528,086 offers a strategically significant protection framework for its assignee, centered around its specific claims defining various chemical and therapeutic aspects of the invention. Its scope balances broad protection with enforceability, influenced by the evolving patent landscape. Navigating the patent's claims and surrounding patents informs licensing, enforcement, and innovation strategies in this competitive pharmaceutical landscape.


Key Takeaways

  • The patent's enforceable scope hinges on both broad independent claims and narrower dependent claims targeting specific derivatives or methods.
  • Its claims contribute to a strategic patent fence, impacting competitors' R&D and licensing decisions.
  • The patent landscape encompasses related patents, with citations and prior art impacting validity.
  • Developing around the patent requires understanding claim language and territorial patent rights.
  • Staying updated on legal rulings affecting claim interpretation ensures strategic adaptability.

FAQs

Q1: What is the primary therapeutic application of the patented invention in U.S. Patent 6,528,086?
The patent generally pertains to a class of compounds or methods aimed at treating specific medical conditions, but precise application depends on the patent's detailed description. Clarification requires direct review of the patent’s detailed specification.

Q2: How broad are the independent claims in this patent?
Independently, the claims typically encompass a core compound class or methodology, with the breadth shaped by structural formulas or process steps. The actual scope is clarified by examining the patent claims section.

Q3: Can competitors develop similar compounds without infringing this patent?
Possible if they design around the claim scope, targeting different structural features or alternative methods. However, careful legal analysis must evaluate the scope and validity of the patent claims.

Q4: How does the patent landscape surrounding U.S. Patent 6,528,086 influence its enforceability?
The surrounding landscape, including citations, related patents, and prior art, affects the validity and strength of this patent. It can lead to challenges or licensing negotiations.

Q5: What strategic advantages does the patent provide to its holder?
It establishes exclusive rights that allow for market control, licensing income, and a competitive edge in the specified therapeutic area, provided the claims are effectively maintained and enforced.


References

  1. U.S. Patent No. 6,528,086. (2003).
  2. Patent landscape reports, TTOs, and legal analyses related to similar chemical compounds and therapeutic methods.
  3. Patent Office records and cited art references within the patent document.

More… ↓

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Drugs Protected by US Patent 6,528,086

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

International Family Members for US Patent 6,528,086

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 345757 ⤷  Get Started Free
Australia 7719800 ⤷  Get Started Free
Canada 2386017 ⤷  Get Started Free
China 100367927 ⤷  Get Started Free
China 101219108 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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