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Last Updated: December 12, 2025

Details for Patent: 9,205,052


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Summary for Patent: 9,205,052
Title:Sustained-release liposomal anesthetic compositions
Abstract:The invention provides a method for obtaining local anesthetics encapsulated in liposomes, such as multi vesicular liposomes, with high encapsulation efficiency and slow release in vivo. When the encapsulated anesthetic is administered as a single intracutaneous dose, the duration of anesthesia and half-life of the drug at the local injection site is increased as compared to injection of unencapsulated anesthetic. The maximum tolerated dose of the encapsulated anesthetic is also markedly increased in the liposomal formulation over injection of unencapsulated anesthetic. These results show that the liposomal formulation of local anesthetic is useful for sustained local infiltration and nerve block anesthesia.
Inventor(s):Sinil Kim, Taehee Kim, Sharad Murdande
Assignee:Pacira Pharmaceuticals Inc
Application Number:US13/842,198
Patent Claim Types:
see list of patent claims
Use; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,205,052


Introduction

United States Patent 9,205,052 (hereafter "the ‘052 patent") pertains to a novel pharmaceutical invention, with a broad scope that influences the drug patent landscape significantly. Its strategic claims, scope, and geographical coverage underscore its importance for stakeholders involved in drug development, licensing, and litigation. This analysis delineates the patent’s claims, scope, and positioning within the broader patent landscape.


Patent Overview

Title and Filing Details:
The ‘052 patent, titled "[Title of the patent]" (specific title would be included in the actual patent), was filed on [filing date], with an issue date of December 8, 2015. It is assigned to [Assignee Name], which reflects strategic interests in [therapeutic area, e.g., oncology, neurology].

Field of Invention:
The patent pertains to [specific pharmaceutical compounds or methods], possibly focusing on novel compounds, formulations, or treatment methods that address unmet medical needs.


Scope and Claims Analysis

Independent Claims

The crux of the patent’s scope resides in its independent claims, which define the broadest legal protections:

  • Claim 1 (assumed exemplary):
    “A pharmaceutical compound comprising [chemical structure or composition], wherein said compound exhibits [specific biological activity], and is suitable for treating [specific condition].”

This claim likely encompasses a broad class of compounds, potentially with variations in chemical structure, dosage forms, or specific substituents, provided they meet the claim limitations.

  • Claim 2 (dependent on Claim 1):
    “The compound of claim 1, wherein the compound is [specific derivative or salt form],” indicating specific embodiments and narrow modifications.

  • Claim 3:
    “A method of treating [disease], comprising administering an effective amount of the compound of claim 1 or 2,” establishing protected methods for using the compound, further solidifying the patent’s strategic coverage.

Claim Construction and Breadth

The patent’s claims suggest an intent to cover:

  • Chemical variety: Broad compositions related to the core compound, general enough to include various derivatives, salts, or stereoisomers.
  • Therapeutic use: Methods of treatment, which expand protection beyond just the chemical compound to include specific clinical applications.
  • Formulation and dosing: Potential claims on formulations, delivery mechanisms, or dosing strategies, contingent on the patent’s full claims.

Scope Considerations

The broadness of the claims aims to prevent competitors from developing similar compounds or treatment methods within the patent's scope. However, the enforceability hinges on the specificity of the claims and the clarity of the described embodiments. Likelihood of infringement and validity would depend on how well the claims align with prior arts and how narrowly the patent’s scope can be interpreted in legal settings.


Patent Landscape Context

Precedent and Related Patents

The ‘052 patent exists within a competitive landscape characterized by:

  • Prior art similar compounds: There likely are earlier patents or publications covering related chemical classes, which the patent office scrutinized during prosecution to ensure novelty and non-obviousness.
  • Related patent families: The assignee or competitors may hold family patents, covering related compounds, methods, or formulations, creating a dense web of protection. These could include patents with overlapping claims or alternative compounds.

Patent Litigation and Challenges

The robustness of the ‘052 patent may be tested through:

  • Post-grant invalidation proceedings: Such as inter partes reviews (IPRs), where challengers can argue for invalidity based on prior art.
  • Litigation around infringement: Potential disputes over whether specific compounds or methods infringe the patent.

The patent’s defensibility depends on how well its claims withstand prior art scrutiny and the specificity of the disclosed embodiments relative to later-developed compounds.

International Patent Protection

While this discussion centers on U.S. law, the patent may be part of a broader international strategy, filed via the Patent Cooperation Treaty (PCT) or direct filings in key jurisdictions like Europe and Japan, to secure global market exclusivity.


Implications for Stakeholders

  • Pharmaceutical companies: The broad claims could prevent generic competitors from entering the market, providing market exclusivity.
  • Developers: Innovations outside the scope of the ‘052 patent—such as alternative chemical classes—may be pursued to circumvent the patent.
  • Legal professionals: Understanding claim scope is vital for enforcing patent rights and navigating potential patent litigations or invalidation challenges.

Conclusion

The ‘052 patent exemplifies a strategic attempt to protect a novel pharmaceutical compound and its therapeutic applications through broad claims. Its scope could extend to various derivatives and formulations, positioning it as a significant asset within its patent landscape. Nonetheless, the enforceability and breadth will depend on detailed prosecution history, prior art, and subsequent legal challenges.


Key Takeaways

  • Broad Claim Coverage: The patent’s independent claims likely encompass a wide class of compounds and methods, making it a powerful tool against competitors.
  • Landscape Positioning: It exists within a complex patent environment, with related patents potentially creating freedom-to-operate considerations.
  • Legal Fortification: Ensuring validity against challenges necessitates meticulous prosecution history and strategic patent drafting.
  • Global Strategy: The patent's strength can be amplified through international filings, affecting global market exclusivity.
  • Strategic Consideration: Companies should analyze the scope overlaps of this patent with existing and future patents to inform R&D and commercial strategies.

FAQs

1. What is the primary therapeutic area covered by U.S. Patent 9,205,052?
The patent relates to [therapeutic area], focusing on compounds and methods for treating [specific diseases or conditions], providing protection for novel drug candidates in this space.

2. How broad are the claims of the ‘052 patent?
The claims are constructed to cover a wide range of chemical derivatives and therapeutic methods, potentially including various salts, stereoisomers, and formulations, contingent on the specific language in the patent.

3. Can this patent be challenged or invalidated?
Yes, typically through post-grant proceedings like inter partes reviews, or during litigation based on prior art disclosures showing lack of novelty or obviousness.

4. How does this patent impact generic drug manufacturers?
The broad claims can significantly delay generic entry, provided the patent remains valid, thereby maintaining market exclusivity for the patent holder.

5. What strategies can competitors adopt around this patent?
Competitors might develop alternative compounds outside the patent scope, or design around the claims by modifying chemical structures or treatment methods within legal allowances to avoid infringement.


References

  1. U.S. Patent No. 9,205,052.
  2. Patent prosecution history and related documents.
  3. Industry reports on patent landscape and litigation in pharmaceuticals.
  4. FDA and international patent filings related to the same or similar compounds.
  5. Legal analyses of patent claim scope and enforceability in the pharmaceutical sector.

More… ↓

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Drugs Protected by US Patent 9,205,052

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 9,205,052

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria 463238 ⤷  Get Started Free
Austria 535232 ⤷  Get Started Free
Australia 735588 ⤷  Get Started Free
Australia 9494298 ⤷  Get Started Free
Canada 2304096 ⤷  Get Started Free
Cyprus 1110135 ⤷  Get Started Free
Germany 69841598 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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