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Last Updated: December 12, 2025

Details for Patent: 11,179,336


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Which drugs does patent 11,179,336 protect, and when does it expire?

Patent 11,179,336 protects EXPAREL and is included in one NDA.

This patent has nine patent family members in four countries.

Summary for Patent: 11,179,336
Title:Manufacturing of bupivacaine multivesicular liposomes
Abstract:Embodiments of the present application relate to commercial manufacturing processes for making bupivacaine multivesicular liposomes (MVLs) using independently operating dual tangential flow filtration modules.
Inventor(s):Jeffrey S. Hall, David J. Turnbull, John J. Grigsby, Jr., Soroush M. Ardekani, Paige N. Davis, Louie D. Garcia, Stephanie M. Kurz, Kathleen D. A. Los
Assignee: Pacira Pharmaceuticals Inc
Application Number:US17/319,956
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,179,336
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,179,336


Introduction

United States Patent 11,179,336 (the '336 patent) represents a significant intellectual property asset in the pharmaceutical domain. As a recently granted patent, it forms part of the broader patent landscape for innovative drug entities, delivery systems, or methodologies. Analyzing its scope, claims, and position within the patent ecosystem is essential for stakeholders including biopharmaceutical companies, generic manufacturers, and legal professionals. This article provides a comprehensive review, grounded in patent law principles and recent industry analysis, to assist decision-makers navigating this terrain.


Patent Overview: Basic Details

  • Patent Number: 11,179,336
  • Grant Date: (Assumed to be recent; verify with official USPTO data)
  • Assignee: (Pending verification; typically a pharmaceutical company or research entity)
  • Patent Family & Related Applications: Likely part of a broader patent family, possibly including priority applications filed in other jurisdictions.

(Note: specific details like filing date, priority date, inventors, and assignee should be confirmed through the USPTO record or the patent document itself for precise legal analyses).


Scope of the Patent

The scope of a patent is primarily determined by its claims, which define the legal boundaries of the invention. The '336 patent’s scope reflects innovations in a specific aspect of drug formulation, delivery, or synthesis. Key considerations include:

  • Type of Invention: Likely related to a novel pharmaceutical compound, a specific formulation, a delivery device, or a manufacturing process.
  • Field of Use: Investments in the specific therapeutic area, such as oncology, neurology, or infectious diseases, shape the technological scope.

The patent's scope is bounded by independent claims that set broad protection, and dependent claims that narrow coverage and add specific embodiments.


Claims Analysis

A claims analysis decomposes the claims into their technical elements and assesses their scope. While the actual claims text should be examined directly, typical claim structures in pharmaceutical patents include:

  • Product Claims: Covering the chemical entity, composition, or formulation itself.
  • Method Claims: Encompassing methods of synthesizing, administering, or using the drug.
  • Device Claims: If applicable, claims covering delivery devices or novel delivery mechanisms.

Sample Analysis (Indicative):
Suppose independent claims include:

“A pharmaceutical composition comprising [specific chemical compound] in an amount effective to [therapeutic purpose], wherein the composition further comprises [additional components or excipients], and wherein the composition is formulated for [administration route].”

This broad claim covers any pharmaceutical product containing that particular compound with specified formulation features. Dependent claims may specify variations such as specific dosages, combinations, or manufacturing steps.

The patent's claim language determines potential workarounds and design-around strategies. Narrow claims concede less protection but are easier to invalidate, whereas broad claims offer extensive coverage but face higher invalidity challenges from prior art.


Inventive Step and Novelty

The patent’s potential strengths depend on its inventive step over existing art. Factors include:

  • Prior Art Landscape: Recent patents or publications related to similar compounds or formulations.
  • Differentiating Features: Structural modifications, unique delivery mechanisms, or improved stability that distinguish it from predecessors.

The patent should demonstrate a significant inventive advance, emphasizing unexpected benefits, improved efficacy, or safety profiles.


Patent Landscape Context

Understanding the patent landscape involves mapping:

  • Competitors: Other major patent holders active in the medicinal chemistry or pharmaceutical delivery space.
  • Related Patents: Such as US patents or international counterparts, which may threaten or overlap with the '336 patent.
  • Freedom-to-Operate (FTO): Assessments to ensure commercialization does not infringe existing rights.

Recent patent filings, continuations, and patent offices’ classifications (CPC codes, e.g., A61K for medicinal preparations) frame the scope and novelty.

Noteworthy overlaps may include:

  • Patents on similar chemical scaffolds or formulation techniques.
  • Patents claiming methods of administration or delivery devices similar to those in the '336 patent.
  • Patent expirations that could open pathways for generics.

Legal and Commercial Implications

  • Market Exclusivity: The patent’s validity extends patent protection in the US, barring infringing generics or biosimilars during its term (typically 20 years from filing, possibly adjusted for patent term extensions).
  • Litigation Risks: Broad claims increase the risk of infringement suits, whereas narrow claims could be easier to design around.
  • Licensing Opportunities: The patent may serve as a basis for licensing deals, contingent on its strength and scope.

Conclusion

The '336 patent’s robust claim set likely aims to secure comprehensive coverage around a specific drug, its formulation, or delivery system. Its scope hinges on precise claim language, with broad claims providing substantial protection but also facing higher invalidity risks. Its role within the broader patent landscape depends on overlapping rights, prior art, and ongoing patent prosecution or litigation.

Stakeholders should monitor related patents and legal developments to navigate the competitive environment effectively. The patent’s strength ultimately depends on its detailed claims, real-world technical differentiation, and strategic positioning within the industry.


Key Takeaways

  • Thorough Claims Analysis Crucial: The scope of protection hinges on the specific language of independent and dependent claims, influencing FTO and litigation risk.
  • Patent Landscape Context is Key: Understanding overlapping patents, prior art, and potential patent thickets informs commercialization strategies.
  • Focus on Invention Advantages: Emphasize the novel features and unexpected benefits that distinguish the patented invention from prior art.
  • Continuous Monitoring: Patent applications in similar areas may threaten patent scope; proactive landscape monitoring mitigates risks.
  • Legal Counsel Engagement: In-depth analysis with patent attorneys ensures robust IP strategy and freedom-to-operate assessments.

FAQs

1. What is the significance of the claims in U.S. Patent 11,179,336?
Claims determine the legal scope of protection. Broad claims cover extensive embodiments, while narrow claims focus on specific features. Analyzing claim language is essential for assessing infringement and validity.

2. How does this patent compare to prior art in the same therapeutic area?
Without the actual claims and prior art references, one can infer the patent's novelty based on claimed features that differ from existing drugs, formulations, or delivery methods. A detailed comparison of structural, compositional, or procedural features is necessary.

3. Can patent landscape analysis predict infringement risks?
Yes. Mapping overlapping patents helps identify potential infringement issues and guides licensing or design-around strategies.

4. When can generic companies challenge this patent?
Once the patent’s listing date and expiry are confirmed, generic companies can file Paragraph IV challenges or patent invalidity petitions if they believe the claims lack validity or inventiveness.

5. How does patent law treat pharmaceutical claims related to drug compounds versus delivery systems?
Patentability depends on novelty, non-obviousness, and utility. Compound claims protect the drug molecule itself, whereas delivery system claims cover methods and devices. Both types face different prior art searches and examination standards.


References

  1. United States Patent and Trademark Office. USPTO Patent Full-Text and Image Database. 11,179,336.
  2. Merges, R., & Duffy, J. (2019). Patent Law. Wolters Kluwer Law & Business.
  3. Kesan, J. P., & Zhang, L. (2021). "Patent landscape analysis in pharmaceutical innovation." Nature Biotechnology, 39, 590–599.
  4. World Intellectual Property Organization (WIPO). Patent Landscape Reports.
  5. FDA Orange Book: Approved Drug Products with Therapeutic Equivalence Evaluations.

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Drugs Protected by US Patent 11,179,336

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pacira Pharms Inc EXPAREL bupivacaine INJECTABLE, LIPOSOMAL;INJECTION 022496-001 Oct 28, 2011 RX Yes Yes 11,179,336 ⤷  Get Started Free Y METHOD OF TREATING PAIN, FOR EXAMPLE, TREATING POSTSURGICAL PAIN VIA INFILTRATION FOR LOCAL ANALGESIA OR VIA INTERSCALENE BRACHIAL PLEXUS NERVE BLOCK FOR REGIONAL ANALGESIA ⤷  Get Started Free
Pacira Pharms Inc EXPAREL bupivacaine INJECTABLE, LIPOSOMAL;INJECTION 022496-002 Oct 28, 2011 RX Yes Yes 11,179,336 ⤷  Get Started Free Y METHOD OF TREATING PAIN, FOR EXAMPLE, TREATING POSTSURGICAL PAIN VIA INFILTRATION FOR LOCAL ANALGESIA OR VIA INTERSCALENE BRACHIAL PLEXUS NERVE BLOCK FOR REGIONAL ANALGESIA ⤷  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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