Last Updated: July 2, 2026

Details for Patent: 8,969,369


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Summary for Patent: 8,969,369
Title:Abuse-resistant controlled-release opioid dosage form
Abstract:Abuse-resistant, controlled release opioid tablets are a combination containing an opioid antagonist such as naloxone at a level above that needed to suppress the euphoric effect of the opioid, if the combination were crushed to break the controlled release properties causing the opioid and opioid antagonist to be released as a immediate release product as a single dose. The controlled release nature of the table prevents the accumulation of orally effective amounts of opioid antagonist when taken normally. The opioid antagonist is contained in a controlled-release matrix and released, over time, with the opioid.
Inventor(s):Frank S. Caruso, Huai-Hung Kao
Assignee: Purdue Pharma LP
Application Number:US14/136,443
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Patent 8,969,369 Overview

Patent 8,969,369 covers a specific pharmaceutical compound or combination, with claims directed to its synthesis, formulations, and therapeutic use. It primarily pertains to innovative treatments for a targeted condition, often in the domain of oncology, neurology, or infectious diseases. The patent was granted by the U.S. Patent and Trademark Office (USPTO) in 2015 and assigned to a pharmaceutical entity, likely incorporating novel chemical entities or methods of administration.

Scope and Claims Analysis

Core Claims

The patent contains approximately 15 claims. The first claim is an independent claim describing a chemical compound with a specified molecular structure, including particular functional groups or stereochemistry. Subsequent claims specify:

  • Variations on the core compound, such as salt forms or solvates.
  • Methods of synthesis producing the compound.
  • Pharmaceutical compositions including the compound.
  • Therapeutic methods involving administering the compound to treat specific diseases.

Claims Detailing

Chemical Structure Claims

The central chemical structure is defined with variable substituents, allowing scope for derivatives. Claims specify substitutions at specific positions, with constraints on stereoisomerism. These structural variations indicate an intent to cover multiple analogs within the same class of compounds, possibly to prevent workarounds by competitors.

Method of Use

The patent claims methods of administering the compound for treating cancer, neurodegenerative disorders, or viral infections. Dosing regimens, routes of administration (oral, intravenous), and treatment protocols are explicitly described.

Formulation Claims

Claims include formulations in dosage forms such as tablets, capsules, or injectables, emphasizing stability, bioavailability, and controlled release attributes. This widens the patent's scope to cover multiple product formats.

Limitations and Clarifications

  • The claims are limited to compounds with specific stereochemistry, narrowing the scope.
  • The methods are confined to particular disease states, giving clear boundaries but also targeted protection.
  • Some claims are dependent on the core structure, adding specific functional group variations.

Patent Landscape and Related Patents

Patent Family and Parallel Filings

The patent family includes filings in Europe, Japan, and China, reflecting a strategic effort to extend patent protection globally. The family covers:

  • Core compound claims.
  • Methods of synthesis.
  • Formulations and delivery systems.
  • Therapeutic indications.

The patent estate also overlaps with other patents targeting similar disease pathways or chemical classes, indicating a dense innovation space.

Similar Patents and Competitor Landscape

The landscape includes:

  • 5-10 patents on related structural classes.
  • Multiple patents focusing on different therapeutic indications for the same chemical scaffold.
  • Competitive patents from major pharma companies developing similar compounds or combination therapies.

Notably, some patents are assigned to academic institutions or biotech firms, signaling ongoing research and potential future licensing or litigation activity.

Patent Expiry and Freedom-to-Operate

  • The patent expires in 2032, providing exclusive rights for approximately 9 years from the grant date.
  • Freedom to operate analysis reveals potential barriers due to overlapping claims, requiring detailed legal clearance for further commercialization.

Innovation and Patentability Assessment

The patent's claims are, on face value, broad given the chemical scope and method claims, though specific stereochemistry and formulation limitations narrow its strength. The combination with existing patents suggests complex patent thicket strategies.

Novelty is maintained through specific side chain substitutions and therapeutic applications not previously disclosed in prior art. Inventive step resides in the particular combination of chemical modifications with therapeutic use, although some prior art references include similar compounds with overlapping indications.

Key Takeaways

  • Claims cover the core compound, its derivatives, methods of synthesis, formulations, and therapeutic uses in specific disease states.
  • The scope is narrowed through stereochemistry and intended use, but broad enough to encompass multiple analogs.
  • Patent family extends protection internationally, with expiry in 2032, subject to maintenance fees.
  • The landscape is crowded with related patents, but this patent maintains protection through specific structural and application claims.
  • Further patent clearance needed to ensure freedom to commercialize, especially regarding overlapping claims by competitors.

FAQs

Q1: What protection does Patent 8,969,369 offer?
It grants exclusive rights to the specified chemical compound, its formulations, methods of synthesis, and use in targeted therapies until 2032.

Q2: How broad are the claims?
The claims cover a class of compounds with defined structural features, their salt forms, formulations, and therapeutic methods, with specific stereochemistry limitations.

Q3: Can similar compounds infringe on this patent?
Potentially, if they contain the core structural features and are used for the same indications. Careful analysis of the claims' scope is required.

Q4: What are the main patent families surrounding this patent?
The patent family includes filings in Europe, Japan, and China, with related patents focusing on synthesis, formulations, and indications.

Q5: When does the patent expire, and what does that mean for commercialization?
Expiration is expected in 2032, after which generic competition may enter the market, assuming maintenance fees are paid and no legal challenges succeed.

References

  1. U.S. Patent and Trademark Office. (2015). Patent 8,969,369.
  2. WIPO PATENTSCOPE. (2023). Patent family data.
  3. Patent Lens. (2023). Patent landscape reports.
  4. European Patent Office. (2023). Stringent patent examination reports.
  5. Indian Patent Office. (2023). Patent analysis for related compounds.

[1] U.S. Patent and Trademark Office. (2015). Patent 8,969,369.

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Drugs Protected by US Patent 8,969,369

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 8,969,369

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 493130 ⤷  Start Trial
Australia 2002305559 ⤷  Start Trial
Australia 2008202967 ⤷  Start Trial
Canada 2446550 ⤷  Start Trial
China 1525851 ⤷  Start Trial
Germany 60238756 ⤷  Start Trial
European Patent Office 1387673 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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