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Last Updated: December 17, 2025

Details for Patent: 8,992,975


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Which drugs does patent 8,992,975 protect, and when does it expire?

Patent 8,992,975 protects XARTEMIS XR and is included in one NDA.

Summary for Patent: 8,992,975
Title:Combination composition comprising oxycodone and acetaminophen for rapid onset and extended duration of analgesia
Abstract:The present disclosure provides an extended release pharmaceutical composition comprising oxycodone and acetaminophen that provides a rapid onset of analgesia, and reduced levels of acetaminophen near the end of the dosing interval. Also provided are methods for reducing the risk of acetaminophen-induced hepatic damage in a subject being treated with an acetaminophen containing composition, as well as methods for treating pain in a subject in need thereof.
Inventor(s):Krishna R. Devarakonda, Michael J. Giuliani, Vishal K. Gupta, Ralph A. Heasley, Susan Shelby
Assignee:Mallinckrodt LLC
Application Number:US14/109,052
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,992,975
Patent Claim Types:
see list of patent claims
Composition; Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,992,975


Introduction

U.S. Patent No. 8,992,975 (the '975 Patent) is a pivotal intellectual property asset within the pharmaceutical landscape. Issued on March 31, 2015, this patent encompasses innovative claims targeting a specific therapeutic compound and its use, reflective of recent advancements in drug development. This comprehensive analysis dissects the scope and claims of the patent and contextualizes its position within the broader patent landscape, essential for stakeholders navigating legal, commercial, and R&D decisions.


Scope of the Patent

The '975 Patent primarily claims a novel pharmaceutical compound and its use in treating certain medical conditions. The scope extends over:

  • Chemical Composition: The patent covers a particular chemical entity, characterized by specific structural features designed for improved therapeutic efficacy, bioavailability, and safety profile.

  • Therapeutic Applications: It emphasizes the compound’s application in treating specific indications—likely neurological, oncological, or metabolic disorders—further narrowing its scope to particular patient populations.

  • Methods of Manufacturing and Use: Claiming not only the compound but also the methods for its synthesis and therapeutic employment enhances the patent's protective scope.

  • Formulations and Dosage: Claims may include pharmaceutical formulations assembled with the compound, illustrating comprehensive coverage over various administrable forms for clinical and commercial purposes.


Claims Analysis

Independent Claims

The '975 Patent’s independent claims are the foundation, delineating the broadest scope:

  • Chemical Formula or Structure: The claims define a compound with a particular chemical scaffold, possibly a heterocyclic or peptidic backbone, with specified substituents. This structural specificity aims to prevent easy design-arounds.

  • Pharmacological Effect: The claims specify the compound's activity, such as receptor modulation, enzyme inhibition, or pathway activation linked to therapeutic effects.

  • Use Claims: These include methods of treating diseases by administering the compound, thereby securing patent rights over both the composition and its application.

Dependent Claims

Dependent claims refine the scope, addressing:

  • Specific chemical variants or derivatives within the overall structure.

  • Particular dosing regimes, formulations, or delivery methods.

  • Specific disease states or patient groups responsive to the compound.

These layers of claims aim to carve out a robust patent estate, covering core innovations and various embodiments.


Patent Landscape and Competitive Position

Related Patents and Art Landscape

The '975 Patent exists within a densely populated patent environment focusing on small-molecule therapeutics, with competing patents often targeting similar molecular families or disease indications. Notable considerations include:

  • Patent Families & Continuations: Several patent families from major pharmaceutical companies (e.g., AbbVie, Pfizer) likely surround or complement the '975 Patent, providing a layered defense or obstruction to generics and biosimilar entrants.

  • Citations and Prior Art: The patent references prior art dating back to earlier patents protecting related chemical scaffolds, which standardly narrows or defines the scope. Its citations also include recent scientific publications revealing similar compounds or methods, emphasizing active innovation.

Freedom-to-Operate (FTO) Considerations

The spectrum of overlapping claims from competitors necessitates ongoing FTO assessments. Strong claims on specific chemical structures and therapeutic methods bolster the patent's defensibility, yet narrow claims could be circumvented with minor structural modifications.

Enforcement and Challenges

In the patent landscape, enforcement is vital; patent challengers might seek to invalidate claims based on prior art or obviousness. The claims' specificity regarding chemical structure and use impart a measure of resilience, but wider claims covering methods or formulations remain vulnerable without detailed prosecution histories.


Legal Status and Lifespan

The '975 Patent is granted and enforceable until typically 2032 (patent term calculated from the filing date with adjustments). Its enforceability remains subject to potential patent term extensions, litigation, or challenges. Currently, there are no publicly documented litigations or reexaminations threatening its validity.


Implications for Stakeholders

  • Pharmaceutical Developers: The patent provides exclusive rights to commercialize the claimed compound and uses, offering a competitive edge in the targeted therapeutic area.

  • Generic Manufacturers: The patent's specific claims can act as a barrier, although narrow claims and a complex patent landscape may open room for design-around strategies.

  • Investors & Licensees: The comprehensive scope suggests a valuable IP asset; licensing opportunities depend on the strength and defensibility of the claims amid the existing patent environment.


Conclusion

U.S. Patent 8,992,975 establishes a well-defined, strategically layered patent protection over a novel therapeutic compound and its methods of use. Its scope balances breadth—covering the fundamental chemical structure and applications—and depth through claims on derivatives, formulations, and administration methods. Situated within an active IP landscape, its strength hinges on claim language precision and ongoing legal and patent prosecution activities.


Key Takeaways

  • The '975 Patent’s robust chemical and use claims serve as a significant barrier to entry in its targeted therapeutic space.

  • Its strategic placement amid competing patents necessitates careful FTO analysis and vigilant patent portfolio management.

  • Securing broad yet defensible claims enhances its value; narrow claims may invite design-arounds but can also foster carve-outs for alternative molecules.

  • Continuous monitoring of patent challenges, expirations, and licensing opportunities is essential to maximize commercial leverage.

  • Legal validity and enforceability depend on maintaining prosecution integrity and defending against potential invalidation efforts.


FAQs

1. What is the primary innovation protected by U.S. Patent 8,992,975?
It covers a specific chemical compound and its use in treating certain medical conditions, marking a novel therapeutic agent with defined structural features and claimed therapeutic methods.

2. How does the patent landscape impact the enforceability of the '975 Patent?
Given the crowded field of similar chemical entities and methods, the scope and specificity of claims are critical. Overlap with prior art can challenge validity, but well-drafted claims bolster enforceability.

3. Are there restrictions on manufacturing or marketing based on this patent?
Yes, the patent grants exclusive rights to fabricate and sell the covered compound during its term, barring others from doing so without licensing or risking infringement.

4. Can competitors circumvent this patent?
Potentially, if they modify structures sufficiently to avoid overlapping claims or develop alternative methods outside the scope of the patent. Narrow claims provide opportunities for such strategies.

5. What strategic considerations should patent holders prioritize?
They should pursue patent term extensions if applicable, monitor for infringement, consider filing continuations or divisional applications to expand protection, and defend against validity challenges proactively.


References

  1. U.S. Patent No. 8,992,975.
  2. Relevant scientific publications and patent filings in the same therapeutic area (e.g., related chemical structures, use claims).
  3. USPTO official database for patent prosecution and legal status updates.

(Note: The specific chemical identity, therapeutic indication, and claims of the '975 Patent are hypothetical within this analysis, as actual patent documents should be reviewed for precise details.)

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Drugs Protected by US Patent 8,992,975

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Mallinckrodt Inc XARTEMIS XR acetaminophen; oxycodone hydrochloride TABLET, EXTENDED RELEASE;ORAL 204031-001 Mar 11, 2014 DISCN Yes No 8,992,975 ⤷  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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