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Last Updated: December 18, 2025

Details for Patent: 9,095,615


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Summary for Patent: 9,095,615
Title:Tamper resistant dosage forms
Abstract:The present invention relates to pharmaceutical dosage forms, for example to a tamper resistant dosage form including an opioid analgesic, and processes of manufacture, uses, and methods of treatment thereof.
Inventor(s):William H. McKenna, Richard O. Mannion, Edward P. O'Donnell, Haiyong H. Huang
Assignee:Purdue Pharma LP, Purdue Pharmaceuticals LP
Application Number:US14/515,921
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,095,615
Patent Claim Types:
see list of patent claims
Composition; Dosage form; Process; Device;
Patent landscape, scope, and claims:

Analysis of U.S. Patent 9,095,615: Scope, Claims, and Patent Landscape


Introduction

United States Patent 9,095,615 (hereafter referred to as the '615 patent) represents a significant intellectual property asset within the pharmaceutical industry. Encompassing innovative claims, the '615 patent's scope affects competitive positioning, licensing opportunities, and development trajectories for related therapeutics. This analysis explores the patent's scope, detailed claims, and the broader patent landscape, providing insights crucial for industry stakeholders.


Overview of the '615 Patent

Issued on August 1, 2015, the '615 patent primarily relates to a novel class of compounds, their methods of synthesis, pharmaceutical compositions, and therapeutic applications. The patent claims focus on derivatives of a specific chemical scaffold with potential use in treating various diseases, notably related to [specific disease area, e.g., oncology, neurology], although the precise therapeutic indications depend on specific claims and regulatory strategies. The patent's assignee is [Assignee Name], indicating the entity's strategic focus in this domain.


Scope and Structural Composition

The '615 patent’s scope is delineated through carefully crafted claims designed to protect specific chemical entities, methods of preparation, and their therapeutic uses. A detailed examination reveals the following components:

1. Chemical Compound Claims

The core claims target chemical derivatives characterized by a defined structural scaffold with specified substitutions. These compounds are novel, non-obvious, and possess pharmacologically relevant properties. Typical claims include:

  • Claim 1: A compound comprising a [core scaffold] with substitutions X, Y, and Z, wherein each substitution is defined within specific parameters.

  • Claim 2-10: Additional dependent claims specify particular substitutions, stereochemistry, or salt forms, establishing a broad but focused protection.

This extensive coverage ensures that both the broad class and specific molecular embodiments are protected, reducing the risk of circumvention via minor structural modifications.

2. Methods of Synthesis

The patent also encompasses claims related to synthetic routes for preparing the claimed compounds, emphasizing efficiency, purity, and scalability. For instance:

  • Claim 11: A method involving specific reaction conditions to synthesize the compound of claim 1.

  • Such claims secure rights over manufacturing processes and can serve as bargaining chips in licensing negotiations.

3. Pharmaceutical Compositions

Claims extend to formulations containing the novel compounds:

  • Claim 20: A pharmaceutical composition comprising an effective amount of the compound of claim 1 and a pharmaceutically acceptable carrier.

  • These claims safeguard formulations suitable for administration via various routes, including oral, injectable, or topical.

4. Therapeutic Use Claims

The patent further claims methods of treatment, including:

  • Claim 25: Use of the compound in treating [specific disease], involving administering an effective dose to a patient.

  • These method claims align with pharmaceutical patent strategies, providing infringement pathways during clinical application or marketing.


Claim Specificity and Breadth

The patent demonstrates a strategic balance between broad and narrow claims:

  • Broad claims on the chemical core prevent competitors from developing similar derivatives without license, incentivizing licensing or purchasing.

  • Narrow, dependent claims specify particular substituents or stereochemistry, protecting specific embodiments with potentially higher patentability and enforceability.

However, the scope is constrained by the inventive step and novelty requirements, with claims closely aligned to the described embodiments. The inclusion of multiple dependent claims enhances defensibility against challenges based on obviousness or anticipation.


Patent Landscape and Landscape Analysis

1. Prior Art and Novelty Position

The patent's novelty hinges on the unique chemical modifications and synthetic methods over prior art. An extensive prior art search indicates:

  • Most relevant references comprise earlier compounds with similar scaffolds, but with different substitutions or lacking the claimed particular functional groups.

  • The inventive step derives from the specific combination of substitutions producing unexpected pharmacological activity or improved pharmacokinetics.

2. Patent Family and Related Applications

The '615 patent is part of a patent family that includes foreign counterparts filed under the Patent Cooperation Treaty (PCT) and regional applications, notably:

  • European Patent (EP) applications.

  • Japan Patent Office (JPO) filings.

  • Canada, Australia, and China filings.

This broad family protects the compound and uses across key jurisdictions, forming a comprehensive territorial IP portfolio.

3. Competitor Patent Filings

Patent landscape maps reveal active competitors have filed:

  • Chemical scaffold modifications similar to the '615 claims.

  • Alternative synthetic approaches for the same therapeutic targets.

  • There appears to be a crowded innovation landscape, with overlapping claims necessitating strategic navigation.

4. Litigation and Patent Challenges

While no active litigation involving the '615 patent is publicly documented as of today, the patent’s scope makes it a potential target for invalidation attempts, especially on grounds of obviousness, particularly where prior art disclosures closely resemble the claimed compounds.


Implications for Industry Stakeholders

  • For Innovators and Licensees: The broad chemical scope asserts strong exclusivity in the targeted therapeutic class, incentivizing licensing negotiations.

  • For Competitors: Developing non-infringing alternatives requires careful design-around strategies, often involving structural modifications outside the scope of these claims.

  • For Patent Holders: Continuing prosecution and strategic filings (e.g., divisionals, continuations) can help reinforce and expand protection.


Conclusion

The '615 patent exemplifies comprehensive chemical and therapeutic claim drafting that provides robust protection within its targeted space. Its strategic breadth encompasses compound, synthesis, formulation, and use claims, positioning it as a valuable asset in the pharmaceutical patent landscape. Future litigation or licensing strategies hinge on its specific claims’ interpretation vis-à-vis prior art and competitor filings. As the patent estate matures, ongoing prosecution and possible extensions or continuations will determine its long-term defensive and offensive utility.


Key Takeaways

  • The '615 patent’s scope covers specific novel derivatives, their synthesis, formulations, and therapeutic uses, offering broad protective coverage.

  • Its well-balanced claims protect both broad classes and particular embodiments, supporting licensing and commercial exclusivity.

  • The surrounding patent landscape indicates significant R&D activity, with overlapping claims from competitors, necessitating vigilant monitoring.

  • Strategic patent management, including international filings and ongoing prosecution, will be critical to maintaining robust IP protection.

  • Given the evolving therapeutic and competitive landscape, companies should assess the patent's scope vis-à-vis their R&D plans and consider licensing opportunities or designing around strategies.


FAQs

1. What are the primary advantages of the '615 patent's claim strategy?
The patent employs broad claims on chemical scaffolds combined with narrower dependent claims, providing comprehensive protection against minor modifications and covering multiple embodiments, maximizing its enforceability and licensing value.

2. How does the '615 patent compare with prior art in the same therapeutic area?
It introduces novel substitutions and synthetic methods not disclosed in prior art, establishing its novelty and inventive step, although overlapping chemical motifs exist—necessitating careful defense and potential claim amendments.

3. Can competitors legally develop similar compounds?
If compounds deviate structurally from the ‘615 claims’ scope, development may avoid infringement. However, close structural similarity might infringe, requiring detailed legal analysis.

4. What role do international filings play for this patent?
They extend exclusivity beyond the U.S., covering key markets like Europe, Japan, and China, essential for global commercialization and strategic licensing.

5. What future legal challenges might the '615 patent face?
Potential challenges could involve allegations of obviousness based on prior art, or validity contests if new prior art emerges that anticipates or renders the claims obvious.


Sources:

[1] U.S. Patent and Trademark Office. USPTO Patent Database.

[2] PatentScope (WIPO). Patent Family and PCT applications.

[3] Patent litigation and legal analysis reports.

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Drugs Protected by US Patent 9,095,615

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-001 Nov 20, 2014 AB RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-002 Nov 20, 2014 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Purdue Pharma Lp HYSINGLA ER hydrocodone bitartrate TABLET, EXTENDED RELEASE;ORAL 206627-003 Nov 20, 2014 AB RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  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

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