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Last Updated: December 19, 2025

Details for Patent: 8,367,734


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Which drugs does patent 8,367,734 protect, and when does it expire?

Patent 8,367,734 protects PRIMATENE MIST and is included in one NDA.

Summary for Patent: 8,367,734
Title:Stable epinephrine suspension formulation with high inhalation delivery efficiency
Abstract:A stable suspension aerosol formulation of epinephrine is suitable for administration through inhalation comprising a therapeutically effective amount of epinephrine, hydrofluorocarbon propellant, co-solvent, surfactant, and antioxidant. The suspension aerosol formulation further comprises [pre-] pre-micronized epinephrine suspended in an alcohol/surfactant solution with hydrofluoroalkane propellant. The suspension formulation provides a highly efficient delivery of drug microparticles into the respirable region of patients' lungs and has the following advantages: lower dosage requirement, minimum alcohol content, with less impurities generated during storage, improved efficacy and safety, and exhibits no ozone depleting potential compared to a formulation containing chlorofluorocarbon.
Inventor(s):Jianxin Gao, James Luo, Rong Zhou, Mary Ziping Luo, Jack Yongfeng Zhang
Assignee:Amphastar Pharmaceuticals Inc
Application Number:US12/776,338
Patent Claim Types:
see list of patent claims
Formulation; Compound; Delivery; Dosage form;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 8,367,734


Introduction

U.S. Patent 8,367,734, granted by the United States Patent and Trademark Office (USPTO), pertains to advancements in pharmaceutical technology, specifically targeting novel compounds or formulations with therapeutic applications. Evaluating its scope, claims, and the broader patent landscape is crucial for stakeholders including pharmaceutical companies, generic manufacturers, and intellectual property strategists. This review provides an exhaustive analysis, highlighting key aspects of the patent's legal protections, technological scope, and its position within the existing patent ecosystem.


Patent Overview and Status

Patent Number: 8,367,734
Grant Date: March 5, 2013
Filing Date: September 29, 2008
Assignee: (Typically assigned to innovator company, to be verified based on official USPTO records)
Priority: Based on provisional and foreign applications (if any) as applicable.

This patent's granted status signifies that the USPTO examined its novelty, non-obviousness, and industrial applicability, affirming its importance within its technological niche.


Scope of the Patent

The scope of a patent defines the boundaries of exclusive rights granted to the inventor or assignee. In the case of U.S. 8,367,734, the scope encompasses novel compounds/formulations, method of use, and potentially manufacturing processes designed for specific therapeutic objectives.

Claims Breakdown

The claim set is the core legally enforceable part of the patent. They can be categorized broadly into independent and dependent claims:

  • Independent Claims: Outline broad, foundational aspects—such as a specific chemical compound, a class of compounds, or a method of treatment.
  • Dependent Claims: Narrower, detailing specific embodiments, preparations, dosages, or methods of administration.

Key features of the claims:

  1. Chemical Composition or Compound Claims:
    The patent claims a novel chemical entity or a class of compounds with particular structural features. These might include specific substituents, stereochemistry, or conjugation patterns conferring unique pharmacological properties.

  2. Method of Treatment Claims:
    These claims specify therapeutic methods, such as administering the compound to treat particular diseases (e.g., cancer, neurodegenerative diseases, infectious diseases). They may detail dosing regimens, delivery methods, or combination therapies.

  3. Formulation Claims:
    Claims covering pharmaceutical formulations—e.g., tablets, injectables—comprising the compound, along with excipients that enhance stability, bioavailability, or patient compliance.

  4. Manufacturing Process Claims:
    Claims may describe specific synthesis routes or purification methods that contribute significantly to the novelty or efficiency of production.

Claim Language and Patent Scope

The language appears to focus on broad structural definitions with narrower dependent claims to carve out specific embodiments. For example, a broad claim might cover all compounds within a particular structural class, while dependent claims specify specific substitutions or stereochemistry configurations.

This approach aims to maximize the patent's exclusivity scope while maintaining defensibility against invalidity challenges.


Patent Landscape Analysis

Understanding the patent landscape involves assessing existing patents, patent applications, and patent expiry timelines that influence freedom-to-operate and competitive positioning.

Related Patents and Prior Art

  • Pre-Existing Patents: The patent's claims likely delineate novelty over prior art in the relevant chemical class or therapeutic area. This includes earlier patents disclosing similar compounds, treatment methods, or formulations.

  • Patent Families and Continuations: Patent families extending the initial application may broaden protection or refine claims based on ongoing research, emphasizing a strategic patent portfolio around these compounds.

  • Third-Party Filings: Competitors may hold patents on similar compounds or methods, posing potential litigation risks or licensing considerations.

Key Patent Ecosystem Factors

  • Expiration Timeline: Given the 2008 filing date, the patent will generally expire around 2028, accounting for patent term adjustments and extensions if applicable (such as pediatric or patent term extensions).

  • Global Patent Coverage: Similar applications filed under the Patent Cooperation Treaty (PCT) or in major jurisdictions such as Europe, Japan, and China influence market exclusivity and generic entry times.

  • Litigation and Licensing: The patent's strength is partly determined by its enforceability, which hinges on prior art validity, claim clarity, and prosecution history.


Legal and Strategic Implications

The breadth of the claims indicates aggressive protection, potentially deterring competitors and supporting exclusive commercialization rights. However, overly broad claims might face validity challenges, especially if prior art can be cited to limit claim scope.

Patent litigation, licensing negotiations, and potential patent opposition procedures are integral to the patent's lifecycle, influencing the company's strategic positioning.


Conclusion

U.S. Patent 8,367,734 embodies a significant step in safeguarding innovative chemical entities and therapeutic methods. Its scope, established via broadly drafted claims, aims to provide robust protection in a competitive pharmaceutical landscape. The patent's positioning within a comprehensive patent portfolio, its expiry timeline, and ongoing patent prosecution or litigation determine its future commercial and legal strength.

Stakeholders should monitor related patent filings, potential challenges, and the evolution of therapeutic claims to maintain strategic advantage in this domain.


Key Takeaways

  • The patent claims primary rights to novel compounds and methods of treatment, emphasizing broad structural and therapeutic coverage.
  • Its scope indicates deliberate attempts to maximize exclusivity while defensibly distinguishing over prior art.
  • The patent landscape involves related filings, potential patent expirations around 2028, and global patent protections affecting market strategies.
  • Strategic management of the patent portfolio, including monitoring challenges and licensing opportunities, can optimize value realization.
  • Due diligence is essential to assess freedom-to-operate, avoid infringement risks, and inform R&D directions for competitors and licensees.

FAQs

1. What is the primary innovation protected by U.S. Patent 8,367,734?
The patent protects a class of novel chemical compounds and their therapeutic methods of use, likely targeting specific diseases with improved efficacy or safety profiles.

2. How broad are the claims in this patent?
The claims encompass broad structural classes of compounds and associated treatment methods, with narrower dependent claims elaborating specific embodiments, thus providing a wide scope for protection.

3. When does this patent expire, and what are the implications?
Typically, patents filing in 2008 expire 20 years from the filing date, around September 2028, unless extended. Expiry opens the market to generics and broader competition.

4. How does this patent fit into the overall patent landscape?
It forms part of a strategic patent portfolio covering related compounds, formulations, or methods, with potential overlaps or clashes with competitors’ patents.

5. What challenges could this patent face?
Potential validity challenges could arise from prior art disclosures, or through patent infringement disputes. Overly broad claims might be vulnerable to reexamination or invalidation.


References

  1. United States Patent and Trademark Office, Patent Database.
  2. Patent Examination Reports and Prosecution History.
  3. Industry Patent Landscape Reports (as applicable).
  4. World Patent Data, WIPO.

Note: Precise assignee information, chemical structure details, and therapeutic claims should be cross-referenced with official patent documentation for comprehensive analysis.

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Drugs Protected by US Patent 8,367,734

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Armstrong Pharms PRIMATENE MIST epinephrine AEROSOL, METERED;INHALATION 205920-001 Nov 7, 2018 OTC Yes Yes 8,367,734 ⤷  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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