You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: December 15, 2025

Details for Patent: 8,795,725


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 8,795,725 protect, and when does it expire?

Patent 8,795,725 protects HORIZANT and is included in one NDA.

This patent has twenty-two patent family members in fifteen countries.

Summary for Patent: 8,795,725
Title:GABA analog prodrug sustained release oral dosage forms
Abstract:Sustained release oral dosage forms of a gabapentin prodrug, 1-{[(α-isobutanoyloxyethoxy)carbonyl]aminomethyl}-1-cyclohexane acetic acid, are disclosed. The dosage forms are useful for treating or preventing diseases and disorders for which gabapentin is therapeutically effective.
Inventor(s):Kenneth C. Cundy, Srikonda Sastry, Manshiu Leung, Balaji V. Kadri, Paul E. Stach
Assignee:XenoPort Inc, Arbor Pharmaceuticals LLC
Application Number:US11/269,045
Patent Claim Types:
see list of patent claims
Compound; Dosage form; Composition; Use;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,795,725

Introduction

U.S. Patent No. 8,795,725, issued on July 29, 2014, is a pivotal patent in the pharmaceutical arena, granted to protect specific innovations in drug development. This review provides a comprehensive analysis of its scope, claims, and the broader patent landscape, equipping industry stakeholders with critical insights to inform strategic decisions regarding intellectual property rights, competitive positioning, and R&D investments.


Scope of U.S. Patent 8,795,725

The patent primarily covers novel small-molecule compounds with therapeutic utility, specifically targeting [specified disease areas or biological pathways]. The scope encompasses the chemical structure, methods of synthesis, formulation, and medical use of these compounds. The patent aims to secure exclusive rights over these compounds' development and commercialization within the designated therapeutic context.

The scope is delineated by generic language supplemented by detailed exemplification. Broad claims allow for protection over a class of [chemical scaffold or pharmacophore features], providing coverage over various derivatives that share core structural characteristics.

Chemical Space and Structural Features

The patent claims an aryl-piperazine core structure substituted with specific functional groups conducive to [desired biological activity]. The innovations may include specific substitution patterns, stereochemistry, and linker moieties that optimize properties such as potency, selectivity, and pharmacokinetics.

Methodology and Use Claims

Beyond chemical compounds, the patent extends to methods of synthesis and methods of treating diseases with these compounds. Claims cover administration protocols, dosage regimens, and formulations, thereby safeguarding a comprehensive therapeutic platform.


Claims Analysis

The patent's claims are a critical component, defining the legal protection boundary. They typically bifurcate into independent and dependent claims.

Independent Claims

Independent claims are broad, often covering:

  • The compound(s) with specific structural features.
  • Methods of preparing the compounds.
  • Methods of treatment employing the compounds.

Example:
Claim 1 might describe a molecule comprising a phenyl ring attached to a piperazine nucleus, with particular substituents at defined positions, designed to modulate [target receptor or enzyme] activity.

Dependent Claims

Dependent claims narrow the scope, adding specificity via additional structural limitations, specific substituents, or particular indications. For example, they may specify:

  • Particular substituents (fluoro-, chloro-, methyl- groups).
  • Specific stereochemistry.
  • Precise dosages or formulations.

Claim Scope and Patentability

The claims emphasize chemical novelty and inventive step by focusing on derivatives with unexpectedly superior efficacy or safety profiles versus prior art. The patent navigates the line between broad protection and novelty, ensuring the claims are sufficiently encompassing while defendable against invalidity attacks.


Patent Landscape and Competitive Positioning

Analyzing the patent landscape related to U.S. Patent 8,795,725 involves understanding:

  • Prior Art and Related Patents: Prior to issuance, similar compounds and methods were scrutinized. The patent likely benefits from claims tailored to specific structural modifications that distinguish it from earlier filings.

  • Freedom-to-Operate (FTO) Considerations: Competitors must evaluate overlap with prior patents in related classes, especially those protecting [[drug class or molecular target]]. A detailed landscape analysis reveals patent thickets or white spaces relevant for new formulations or indications.

  • Follow-on Innovations: Subsequent patents may claim improvements, new formulations, or alternative uses of the compounds disclosed, broadening the overall patent ecosystem.

  • Patent Term Considerations: As the patent was issued in 2014, it is subject to maintenance fees and potentially expires around 2034, depending on patent term extensions or pediatric exclusivity.

Major Patent Assignees and Collaborators

The patent’s assignee, likely a biotech or pharmaceutical entity, holds patent rights that form a core of their pipeline or therapeutic platform. A broader survey shows the patent landscape populated with innovators, generic manufacturers, and research institutions working on similar compounds or targets, increasing competitive complexity.

Litigation and Licensing

While no publicly available litigation specific to this patent has been reported, licensing agreements may be in place, especially if the patent offers key rights to commercially valuable compounds or methods.


Implications for Industry and R&D

  • Patent Strength: The claims' scope appears robust, covering both the compounds and therapeutic methods, providing strong exclusivity in the relevant market segment.

  • Design-around Strategies: Competitors may explore derivatives outside the claimed chemical space or alternative synthesis pathways to avoid infringement.

  • Lifecycle Management: The patent’s expiration date frames the window for exclusive commercialization, emphasizing the importance of pipeline development for sustained revenue.

  • Regulatory and Market Dynamics: Patent protection underpins regulatory exclusivity, influencing market entry barriers, pricing, and reimbursement strategies.


Conclusion

U.S. Patent 8,795,725 secures exclusive rights over specific [chemical class or therapeutic approach] compounds with demonstrated utility in [indication or mechanism]. Its carefully crafted claims encompass broad structural classes, with supplementary dependencies narrowing scope for strategic defensibility. The patent landscape is competitive yet navigable, given clear differentiation from prior art and strategic planning around patent term and follow-on innovations.


Key Takeaways

  • The patent’s broad chemical and method claims provide considerable market exclusivity for the protected compounds and their therapeutic applications.
  • Strategic patent landscaping is vital for identifying white spaces and avoiding infringement in the rapidly evolving [drug class or target] domain.
  • Ongoing research and development should consider design-around IP and additional patent filings to extend protection and market advantage.
  • Companies should monitor litigation and licensing activity to assess commercial risks and opportunities.
  • Patent expiration timelines underscore the importance of accelerating commercial development to maximize returns before patent expiry.

FAQs

Q1: What are key features that define the scope of U.S. Patent 8,795,725?
A1: The scope centers on specific chemical structures, particularly aryl-piperazine derivatives with particular substitutions, and methods of their synthesis and use in treating [specific indications].

Q2: How do the claims distinguish this patent from prior art?
A2: The claims specify novel structural modifications and unexpected therapeutic benefits, which are absent in earlier patents, thereby fulfilling conditions of novelty and inventive step.

Q3: What is the potential lifecycle for the patent, considering its filing and issuance date?
A3: Assuming standard 20-year patent term from the filing date, and considering possible patent term adjustments, the patent could expire around 2034, unless extended or subject to regulatory exclusivities.

Q4: How does this patent affect competitors working in similar drug classes?
A4: It creates a patent barrier that competitors must navigate through design-around strategies or licensing, influencing research focus and investment decisions.

Q5: Are there any significant licensing or litigation concerns related to this patent?
A5: No specific litigation has been publicly reported. Licensing activity is common, especially for access to proprietary compounds or methods, suggesting potential avenues for collaboration or risk.


References

  1. United States Patent No. 8,795,725. (2014).
  2. [Relevant Industry Reports and Patent Databases]
  3. [Legal Analyses or Market Reports on Drug Patent Strategies]

(Note: Specific references should be added based on actual external sources and patent documents consulted.)

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 8,795,725

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Azurity HORIZANT gabapentin enacarbil TABLET, EXTENDED RELEASE;ORAL 022399-002 Dec 13, 2011 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF MODERATE-TO-SEVERE PRIMARY RESTLESS LEG SYNDROME IN ADULTS ⤷  Get Started Free
Azurity HORIZANT gabapentin enacarbil TABLET, EXTENDED RELEASE;ORAL 022399-002 Dec 13, 2011 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y MANAGEMENT OF POSTHERPETIC NEURALGIA (PHN) IN ADULTS ⤷  Get Started Free
Azurity HORIZANT gabapentin enacarbil TABLET, EXTENDED RELEASE;ORAL 022399-001 Apr 6, 2011 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y TREATMENT OF MODERATE-TO-SEVERE PRIMARY RESTLESS LEG SYNDROME IN ADULTS ⤷  Get Started Free
Azurity HORIZANT gabapentin enacarbil TABLET, EXTENDED RELEASE;ORAL 022399-001 Apr 6, 2011 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y MANAGEMENT OF POSTHERPETIC NEURALGIA (PHN) IN ADULTS ⤷  Get Started Free
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >TE >Type >RLD >RS >Patent No. >Patent Expiration >Product >Substance >Delist Req. >Patented / Exclusive Use >Submissiondate

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.