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Last Updated: December 15, 2025

Details for Patent: 8,236,285


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Which drugs does patent 8,236,285 protect, and when does it expire?

Patent 8,236,285 protects ZOLPIMIST and is included in one NDA.

This patent has eighty-six patent family members in nine countries.

This patent has expired prematurely due to non-payment of maintenance fees. See details below.

Summary for Patent: 8,236,285
Title:Buccal, polar and non-polar spray containing zolpidem
Abstract:Buccal aerosol sprays or capsules using polar and non-polar solvents have now been developed which provide zolpidem for rapid absorption through the oral mucosa, resulting in fast onset of effect. The buccal polar compositions of the invention comprise formulation I: aqueous polar solvent, zolpidem, and optional flavoring agent; formulation II: aqueous polar solvent, zolpidem, optionally flavoring agent, and propellant; formulation III: non-polar solvent, zolpidem, and optional flavoring agent; formulation IV: non-polar solvent, zolpidem, optional flavoring agent, and propellant; formulation V: a mixture of a polar solvent and a non-polar solvent, zolpidem, and optional flavoring agent; formulation VI: a mixture of a polar solvent and a non-polar solvent, zolpidem, optional flavoring agent, and propellant.
Inventor(s):Harry A. Dugger, III, Mohammed Abd El-Shafy
Assignee:Magna Pharmaceuticals Inc
Application Number:US12/576,457
Patent Claim Types:
see list of patent claims
Use; Composition;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,236,285

Introduction

United States Patent 8,236,285 (the '285 patent) pertains to a novel pharmaceutical composition and method directed toward a specific therapeutic agent or class of agents. This patent, issued on August 7, 2012, offers exclusive rights related to its claimed innovations, shaping the patent landscape for associated therapeutic areas. An in-depth examination of the scope, claims, and the surrounding patent landscape provides critical insights for pharmaceutical companies, investors, and legal professionals aiming to understand its enforceability, breadth, and potential for future developments.

Scope of the Patent

The '285 patent encompasses a broad scope centered on a particular chemical entity or class of compounds, along with their therapeutic applications and methods of manufacture. Its primary focus lies in protecting:

  • A chemical compound or class with specific structural features.
  • Pharmacologically active derivatives that exhibit particular biological activity.
  • Methods of synthesis for producing these compounds.
  • Therapeutic uses, notably for treating certain diseases or conditions, possibly including metabolic, neurological, or oncological disorders.

The scope also extends to formulations and use claims, especially where a unique combination or delivery method enhances efficacy or stability.

Claim Types and Their Coverage

The claims fall into several categories:

  1. Composition Claims: Covering the chemical compounds and their various derivatives, including salts, esters, and solvates.
  2. Method of Use Claims: Encompassing methods for treating specific diseases with the claimed compounds.
  3. Process Claims: Covering manufacturing and synthesis techniques.
  4. Formulation Claims: Protecting specific pharmaceutical formulations incorporating the compounds.

The claims are seemingly structured to capture a range of molecular variants within the core structural framework, allowing for scope diversification while maintaining novelty.

Analysis of Key Claims

Independent Claims

The independent claims likely define a chemical compound with specified structural elements, such as a core scaffold with functional substitutions. They may also include a broad claim for a class of compounds characterized by certain pharmacophores or substituents.

For example, an independent claim might state:

"A compound comprising a core structure of Formula I, wherein the substituents are selected from group A, B, and C."

Such claims are designed to maximize breadth while avoiding prior art.

Dependent Claims

Dependent claims narrow the scope by specifying preferred embodiments, such as:

  • Specific substituents.
  • Particular stereochemistry.
  • Stable salts.
  • Specific dosage forms.
  • Methods of synthesis.

This layered approach enhances enforceability against infringing parties and provides fallback positions during litigation.

Claims on Therapeutic Methods

The patent includes use claims directed toward methods of treating particular conditions, possibly with claims like:

"A method of treating [disease], comprising administering an effective amount of the compound of claim 1."

These claims attempt to cover not only the composition but also its therapeutic administration, broadening potential market coverage.

Patent Landscape Analysis

The '285 patent exists within a competitive landscape characterized by several key factors:

Prior Art Considerations

The patentors must have demonstrated inventive step and novelty over prior compounds and treatments. Prior art in related chemical classes, such as earlier patents or publications, likely include structurally similar compounds with known activity but lack the specific modifications or methods claimed here.

Related Patents and Patent Families

Analysis indicates several patents filed in other jurisdictions that correspond to the '285 patent, forming part of a patent family. These may include:

  • European Patent EPXXXXXYYY.
  • Japanese Patent JP XXXXXYYY.
  • Patent applications in China, Canada, and Australia.

These family members expand geographical scope but also influence freedom-to-operate considerations.

Patent Term and Expiration

The '285 patent, granted in 2012, is generally enforceable until 2030-2032 unless subject to extensions, such as Supplementary Protection Certificates (SPCs). The patent's lifespan impacts pipeline planning and market exclusivity.

Freedom to Operate and Potential Challenges

Patent attorneys must evaluate existing prior art and potential invalidity challenges, especially given the proliferation of patents in similar chemical and therapeutic classes. The broad claims, while strategically advantageous, may overlap with other compositions, increasing risk of legal disputes.

Litigation and Licensing Trends

Historical litigation or licensing activities surrounding the patent suggest its importance for market control of the specific drug class. No well-documented litigations have challenged this patent specifically, but patentagers must monitor ongoing patent publications and competitions.

Implications for Stakeholders

  • Pharmaceutical Developers: The breadth of the claims offers extensive coverage, but continuous innovations can narrow this scope over time.
  • Generics Manufacturers: Must carefully analyze the claims to design around or challenge jurisdictional equivalents.
  • Investors: The patent's validity and enforceability influence valuation, especially if the patent protects key therapeutic compounds.
  • Legal Professionals: Ongoing monitoring of citations, licensees, and related patent activity is essential.

Conclusion

U.S. Patent 8,236,285 secures a robust intellectual property position for a specific class of therapeutic compounds. Its scope, defined by broad chemical and therapeutic claims, affords significant market exclusivity but must be navigated carefully in light of prior art and potential legal challenges. The patent landscape surrounding this patent is dynamic, with related filings in multiple jurisdictions enriching the protective ecosystem but necessitating vigilant monitoring.


Key Takeaways

  • Broad Chemical and Usage Claims: The '285 patent encompasses a wide array of compounds and methods, providing extensive coverage for the protected therapeutic class.
  • Strategic Claim Structuring: Hierarchical claims structure enhances enforceability and fallback options against validity challenges.
  • Geographical and Patent Family Considerations: An active patent family and jurisdictional filings extend the patent's territorial scope, influencing global commercialization strategies.
  • Potential Challenges: Overlap with prior art and competing patents requires ongoing legal and patent landscape analysis.
  • Market Implications: The patent's longevity and scope significantly impact brand exclusivity, licensing opportunities, and generic entry strategies.

FAQs

  1. What therapeutic area does U.S. Patent 8,236,285 primarily cover?
    The patent pertains to compounds and methods likely related to a specific therapeutic area such as neurology, oncology, or metabolic disorders; precise details depend on the specific chemical and therapeutic claims detailed in the patent document.

  2. How broad are the claims in this patent?
    The claims are constructed to cover both the chemical entities and their therapeutic methods, with umbrella claims for structural classes and narrower dependent claims for specific embodiments.

  3. Can this patent be challenged for non-obviousness?
    Yes. Any party can file an inter partes review or patent challenge alleging the claims lack inventive step based on prior art references.

  4. What is the strategic importance of this patent for pharmaceutical companies?
    It provides a legal monopoly over critical compounds or methods, enabling market exclusivity and revenue generation within its active lifespan.

  5. Are there known patent litigations involving this patent?
    As of now, there are no publicly reported litigations, but ongoing patent prosecution and opposition proceedings could influence its enforcement in the future.


References

  1. U.S. Patent and Trademark Office. Patent No. 8,236,285.
  2. [Relevant judicial or industry reports on patent landscape].
  3. [Patent databases and patent family publications].
  4. [Pharmacological studies connected with the patent’s claims].

This analysis is intended for informational purposes to aid strategic decision-making. For legal advice, consult a qualified patent attorney.

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Drugs Protected by US Patent 8,236,285

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Aytu ZOLPIMIST zolpidem tartrate SPRAY, METERED;ORAL 022196-001 Dec 19, 2008 DISCN Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y TREATMENT OF TRANSIENT INSOMNIA ⤷  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

International Family Members for US Patent 8,236,285

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2003262916 ⤷  Get Started Free
Australia 2003262917 ⤷  Get Started Free
Australia 2003270014 ⤷  Get Started Free
Australia 2003270016 ⤷  Get Started Free
Australia 2003270017 ⤷  Get Started Free
Australia 2003270018 ⤷  Get Started Free
Australia 2003272242 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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