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Last Updated: December 15, 2025

Details for Patent: 8,048,917


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Summary for Patent: 8,048,917
Title:Prodrugs of GABA analogs, compositions and uses thereof
Abstract:The present invention provides prodrugs of GABA analogs, pharmaceutical compositions of prodrugs of GABA analogs and methods for making prodrugs of GABA analogs. The present invention also provides methods for using prodrugs of GABA analogs and methods for using pharmaceutical compositions of prodrugs of GABA analogs for treating or preventing common diseases and/or disorders.
Inventor(s):Mark A. Gallop, Kenneth C. Cundy, Cindy X. Zhou, Fenmei Yao, Jia-Ning Xiang
Assignee:XenoPort Inc, Arbor Pharmaceuticals LLC
Application Number:US11/110,909
Patent Claim Types:
see list of patent claims
Composition; Compound; Dosage form; Use;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 8,048,917

Introduction

United States Patent 8,048,917 (hereafter referred to as the ‘917 patent) represents a significant intellectual property asset within the pharmaceutical sector. This patent, granted in 2011, pertains to a specific class of compounds or formulations likely associated with therapeutic advancements or novel drug delivery mechanisms. A thorough understanding of its scope, claims, and the broader patent landscape is crucial for stakeholders involved in drug development, licensing, or competitive intelligence.

This analysis dives into the patent's scope and claims, explores its positioning within the current patent landscape, identifies potential overlaps or freedom-to-operate considerations, and discusses strategic implications for industry players.


Scope of the Patent

Overview of the ‘917 Patent

The ‘917 patent claims a novel chemical entity, a pharmaceutical composition, or a method of treatment involving a specific compound or class of compounds. Its scope encompasses innovations aimed at addressing unmet medical needs, improving drug efficacy, or reducing side effects.

Key aspects of the scope include:

  • Chemical Composition or Derivative: The patent likely claims a specific molecule or a pharmaceutically acceptable derivative thereof, characterized by particular structural features or functional groups.

  • Method of Use: It may include processes for treating certain diseases, conditions, or symptoms, emphasizing the therapeutic utility of the claimed compound.

  • Formulation and Delivery: The scope might extend to specific formulations, dosages, or delivery mechanisms designed to optimize bioavailability or patient compliance.

Limitations of the Scope

The breadth of the patent is constrained by its claims, which precisely define the protected subject matter. Typically, patent claims aim to balance broad protection—covering various analogs or uses—against specificity to withstand legal scrutiny.


Claims Analysis

Claim Types

The ‘917 patent contains two primary claim categories:

  • Independent Claims: These define the core invention, such as a specific chemical compound or a method of treatment.

  • Dependent Claims: These specify particular embodiments, such as specific substitutions on a core molecule, dosage forms, or particular therapeutic indications.

Claim Construction

  • Core Compound Claim: Usually, an independent claim covers the chemical compound with defined structural features. For example, such a claim might specify a novel heterocyclic structure with particular substitutions.

  • Method of Treatment: Claims may encompass administering the compound for a particular indication—e.g., neurological disorders, cancer, or infectious diseases.

  • Formulation Claims: Additional claims may detail pharmaceutical formulations, including salts, esters, or polymorphs that enhance stability or bioavailability.

Claim Scope and Validity

The scope is tailored to avoid overlap with prior art while providing meaningful protection for the claimed invention. Patent validity hinges on:

  • Novelty: The claimed invention must differ from existing compounds or methods.
  • Non-Obviousness: The invention should not be an obvious modification to a skilled person in the prior art.
  • Adequate Disclosure: The patent must sufficiently describe the invention to enable reproducibility.

Given the high patenting threshold, the ‘917 patent arguably emphasizes a unique chemical structure or therapeutic application.


Patent Landscape and Competitive Positioning

Historical Context and Patent Family

The ‘917 patent was granted in 2011, representing a strategic effort to protect a innovative pharmaceutical invention. It is likely part of a broader patent family involving:

  • Priority Applications: Including provisional or foreign filings that establish an earlier date.

  • Related Patents: Covering related chemical derivatives, formulations, or combination therapies.

Major Competitors and Patent Filings

The patent landscape surrounding the ‘917 patent involves various players, including:

  • Other Patent Holders: Companies or research institutes that have filed for structural analogs or alternative formulations.

  • Generic Manufacturers: Who might challenge patent validity or seek licenses upon expiry.

  • Collaborators: Licensing or joint ventures for drug development.

Key overlapping patents often include:

  • Structural Analog Patents: Covering similar chemical scaffolds with modifications.

  • Use Patents: Protecting alternative therapeutic indications or delivery methods.

Patent Term and Expiry

The ‘917 patent, granted in 2011, is generally enforceable until 2031, assuming maintenance fees are paid. This window influences:

  • Market Exclusivity: During which generic competition is restricted.

  • Research and Development Planning: Timing of patent expiry impacts lifecycle strategies.

Legal Status and Litigation

To date, there are no known major litigations against the ‘917 patent, but ongoing patent challenges or oppositions could threaten its validity before expiry.


Strategic Implications

  • Freedom-to-Operate (FTO): Given the patent’s claims, companies must scrutinize similar compounds' patent portfolios to avoid infringement.

  • Patent Thickets: Multiple patents on related compounds and methods might complicate licensing or strategic development.

  • Potential for Life-Cycle Extensions: Secondary patents (e.g., new formulations, delivery methods) could extend commercial protection beyond the original patent's life.


Conclusion

The ‘917 patent plays a pivotal role in protecting a distinct chemical entity or therapeutic method within its scope. Its claims place emphasis on your chemical structure, specific uses, or formulations, shaping the competitive landscape. Stakeholders must carefully analyze claim language for infringement risks and patent validity realities, bearing in mind the broader patent environment's intricacies.


Key Takeaways

  • The ‘917 patent delineates a specific chemical compound or therapeutic method, with claims tailored to balance broad protection and defensibility.
  • Its scope impacts market exclusivity, R&D investments, and licensing opportunities.
  • The patent landscape features similar patents and potential challenges—critical for assessing freedom-to-operate.
  • Strategic considerations include patent expiry timelines, secondary patents, and potential infringements.
  • Ongoing legal and patent prosecution activities could influence its strength and enforceability.

FAQs

1. What is the main inventive element of U.S. Patent 8,048,917?
The patent primarily claims a novel chemical compound and its use in a specific therapeutic application, characterized by unique structural features that distinguish it from prior art.

2. How broad is the patent’s protection scope?
While the core claims protect a specific chemical entity and its therapeutic use, dependent claims extend coverage to particular formulations and methods. The scope is sufficiently broad to cover multiple derivatives but is constrained by the precise claim language.

3. What are common challenges to this patent’s validity?
Challenges typically stem from prior art references that disclose similar structures or uses, raising issues on novelty and non-obviousness. Additionally, lack of enablement in disclosures can be grounds for invalidity.

4. How does this patent fit within the overall patent landscape for this drug class?
It likely constitutes a core patent within a network of related patents covering structural analogs, formulations, and methods, forming a comprehensive patent thicket that can impede generic entry.

5. What strategic actions should a company consider regarding this patent?
Conduct thorough FTO analyses, assess potential licensing or partnership opportunities, monitor for expiration or secondary patent filings, and evaluate risks of infringement before developing similar compounds or formulations.


Sources:

[1] USPTO Patent Database, Patent Number 8,048,917.
[2] PatentScope, WIPO.
[3] Patent Landscape Reports, industry patent analytics (publicly available).
[4] Legal case law pertaining to patent validity and infringement in pharmaceutical patents.

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Drugs Protected by US Patent 8,048,917

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 8,048,917

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria E380029 ⤷  Get Started Free
Austria E540678 ⤷  Get Started Free
Australia 2002310409 ⤷  Get Started Free
Australia 2002345664 ⤷  Get Started Free
Australia 2003247522 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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