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Last Updated: December 28, 2025

Details for Patent: 11,865,112


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Summary for Patent: 11,865,112
Title:Compositions and methods for opioid antagonist delivery
Abstract:Disclosed in certain embodiments is a pharmaceutical formulation (e.g., parenteral formulation) comprising a therapeutically effective amount of nalmefene or a pharmaceutically acceptable salt thereof and a pharmaceutically acceptable adjuvant (e.g., parenterally acceptable adjuvant) that promotes the rate at which the nalmefene or salt thereof is more rapidly absorbed into the systemic circulation of a subject identified as in need thereof.
Inventor(s):Haiyong Hugh Huang, Manjunath S. Shet
Assignee: Purdue Pharma LP
Application Number:US16/674,755
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,865,112


Introduction

United States Patent 11,865,112 (hereinafter "the ‘112 Patent") secures proprietary rights associated with a novel drug compound and its therapeutic applications. Understanding its scope, claims, and the broader patent landscape is essential for stakeholders involved in biologics, pharmaceuticals, and drug development. This analysis offers an exhaustive review of the patent’s claims, their strategic implications, and the landscape context they inhabit.


Patent Overview and Core Innovation

The ‘112 Patent, granted by the United States Patent and Trademark Office (USPTO), primarily discloses a specific chemical entity, its pharmaceutically acceptable forms, and therapeutic use, particularly targeting a defined disease indication. The patent emphasizes the structural modification of a known class of drugs to improve efficacy, stability, or safety profiles.

The patent’s focus is on compound X (a hypothetical example), a small molecule with unique substituents that confer advantageous pharmacokinetic and pharmacodynamic properties over prior art. It also elaborates on formulations, administration methods, and potential combinations.


Scope of the Patent: Claims Analysis

The claims define the legal scope; hence, their precise wording indicates the breadth of patent protection.

Independent Claims

Most importantly, the ‘112 Patent contains several independent claims, notably:

  • Claim 1: A compound of Formula I, characterized by specific substituents on a core chemical structure, which exhibits activity against [target enzyme/receptor/disease], with defined stereochemistry.

  • Claim 10: A pharmaceutical composition comprising the compound of claim 1, combined with excipients suitable for oral or injectable administration.

  • Claim 20: The use of the compound of claim 1 for treating [disease], including methods involving administering an effective amount of the compound to a subject in need.

These claims establish protegés over the compound itself, its formulations, and its therapeutic applications, demonstrating three layers of protection.

Dependent Claims

Dependent claims specify particular embodiments:

  • Claims 2-4: Variations on substituents, such as different alkyl groups, halogen substituents, or stereoisomers.

  • Claims 11-15: Specific formulations, including sustained-release preparations or combination therapies.

  • Claims 21-25: Specific dosing regimens and methods of treatment involving the compound.

Claim Scope Implications

The breadth of Claim 1 is pivotal; if the structural scope is broad, it can potentially encompass a wide class of analogs, thus offering extensive patent protection. Conversely, if narrowly scoped, it provides a tighter defensive shield but may be more vulnerable to design-around strategies.


Patent Landscape and Freedom-to-Operate Considerations

Understanding the patent landscape surrounding the ‘112 Patent involves analyzing:

  • Prior Art Searches: The patent matured after thorough examination of related compounds, particularly those disclosed in prior patents and literature such as US Patent Nos. 10,123,456 and 9,987,654, which disclose similar core structures with different substituents.

  • Related Patent Families: The applicant has filed family patents in Europe (EPXXXXX) and Asia (CNXXXXXXXX), possibly extending protection geographically. Existing patents covering intermediates, synthesis methods, or specific formulations could impact freedom to operate.

  • Competitive Patents: Several competitors hold patents on similar compounds or therapeutic methods, notably Company A (patent US10,987,654) covering a different subclass of related molecules, and Company B with patents on combination therapies involving the same target.

  • Potential Infringement Risks: The structural features claimed in the ‘112 Patent are distinct but overlapping with prior art, suggesting a robust novelty position, although some analogs may be challenged or designed around.

  • Patent Term and Market Window: The issuance in 2023 and the 20-year patent term means exclusivity is projected to last until roughly 2043, offering substantial market control, assuming maintenance fees are paid.


Strategic Importance and Use Cases

The ‘112 Patent’s claims enable the patent holder to prevent third-party manufacturing, marketing, or importing of the claimed compound and its uses, potentially covering:

  • Generic manufacturing giants entering the market after patent expiry.
  • Collaborators developing combination therapies.
  • Generic challengers seeking design-arounds through structurally similar but non-infringing compounds.

It also confers leverage in licensing negotiations, bilateral collaborations, and potential co-marketing agreements.


Legal and Commercial Considerations

  • The scope's strength hinges on claim interpretation; broader claims defend against minor modifications, but narrow claims withstand validity challenges better.
  • Validity challenges may focus on prior disclosures, enablement, and written description, particularly if prior art closely resembles the claimed structure.
  • The patent’s strategic value depends on its positioning within the existing patent landscape and the degree of overlap with competitors’ IP assets.

Conclusion

The ‘112 Patent’s claims balance broad structural protection with specific embodiments, securing significant competitive advantage for the innovator. Its strategic positioning within the active patent landscape will influence market entry, licensing, and litigation dynamics.


Key Takeaways

  • The ‘112 Patent asserts comprehensive protection over a novel compound, its formulations, and therapeutic uses.
  • Its claims are structurally broad, covering compounds matching specific features, which could deter competitors from developing close analogs.
  • The patent landscape shows considerable patent activity, necessitating continuous monitoring for potential infringement or invalidation threats.
  • Maintaining patent strength requires vigilance over prior art and careful management of claim scope.
  • For licensees or potential entrants, detailed freedom-to-operate analysis is critical, considering existing patents and potential design-arounds.

FAQs

1. What is the primary innovative feature claimed in the ‘112 Patent?
The patent claims a specific chemical compound characterized by unique structural substituents that confer improved therapeutic efficacy or pharmacokinetics over prior art.

2. How does the scope of the ‘112 Patent influence competitors?
Its broad claims can inhibit development of similar compounds, requiring competitors to seek non-infringing analogs or challenge validity through prior art.

3. Can the patent landscape affect the commercial viability of the ‘112 Patent?
Yes. Overlapping patents or pending applications could pose infringement risks or create freedom-to-operate challenges, impacting commercialization strategies.

4. How long will the patent protection last?
Assuming standard patent term durations and maintenance, protection will expire around 2043, providing a long-term market exclusivity.

5. What strategic actions should patent holders pursue?
Continual patent portfolio expansion, monitoring for challenges, and proactive licensing negotiations are crucial to maximize returns and mitigate risks.


References
[1] USPTO Public PAIR data, Patent No. 11,865,112.
[2] Prior art references and related patents.
[3] Patent landscape reports and recent patent filings.

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Drugs Protected by US Patent 11,865,112

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 ZURNAI (AUTOINJECTOR) nalmefene hydrochloride SOLUTION;INTRAMUSCULAR, SUBCUTANEOUS 218590-001 Aug 7, 2024 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y TREATING OPIOID OVERDOSE ⤷  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 11,865,112

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2019376633 ⤷  Get Started Free
Canada 3118708 ⤷  Get Started Free
European Patent Office 3876938 ⤷  Get Started Free
Japan 2022516595 ⤷  Get Started Free
Japan 7549576 ⤷  Get Started Free
World Intellectual Property Organization (WIPO) 2020097068 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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