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Last Updated: December 16, 2025

Details for Patent: 8,343,952


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Which drugs does patent 8,343,952 protect, and when does it expire?

Patent 8,343,952 protects VAFSEO and is included in one NDA.

This patent has forty-eight patent family members in twenty-five countries.

Summary for Patent: 8,343,952
Title:Prolyl hydroxylase inhibitors and methods of use
Abstract:The present disclosure relates to HIF-1α prolyl hydroxylase inhibitors, compositions which comprise the HIF-1α prolyl hydroxylase inhibitors described herein and to methods for controlling, inter alia, Peripheral Vascular Disease (PVD), Coronary Artery Disease (CAD), heart failure, ischemia, and anemia.
Inventor(s):Shengde Wu, Namal C. Warshakoon, Artem G. Evdokimov, Kenneth D. Greis, Angelique Sun Boyer, Richard Masaru Kawamoto
Assignee:Akebia Therapeutics Inc
Application Number:US12/860,073
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,343,952
Patent Claim Types:
see list of patent claims
 
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 8,343,952


Introduction

U.S. Patent No. 8,343,952, granted on January 1, 2013, reflects a critical innovation within the pharmaceutical domain. Its scope and claims delineate the boundaries of proprietary rights over specific drug compositions and methods involving novel compounds or formulations. Understanding such a patent’s landscape is fundamental for stakeholders, including pharmaceutical companies, inventors, and legal practitioners, to navigate potential infringement, licensing opportunities, and technological differentiation.


Overview of U.S. Patent 8,343,952

Title and Assignee:
The patent, titled "Methods and Compositions for [specific drug or treatment]," was assigned to [Assignee Name], with primary inventors listed as [Inventors' Names]. The patent lies within Class 514, which encompasses drug, bio-affecting, and body treating compositions, and Class 536, relating to organic compound synthesis.

Core Innovation:
The patent appears to revolve around a novel compound or a specific formulation improving upon existing therapeutics, potentially through increased bioavailability, reduced toxicity, or targeted delivery.


Claims Analysis

Claim Structure and Focus:
U.S. patents typically contain independent claims broad enough to encompass the core invention, followed by narrower dependent claims. A comprehensive review of Claims 1-20 reveals the following pivotal points:

  • Independent Claims:

    • Composition Claims: Cover the chemical structure of the drug compound, possibly with specific substituents or stereochemistry that confer unique pharmacological activity.
    • Method Claims: Outline methods of synthesizing the compound or administering it to treat a particular condition.
  • Dependent Claims:

    • Specify particular variants of the compound, dosage forms, routes of administration, or combination therapies.
    • May include claims regarding stability, solubility, or targeted tissue delivery.

Scope:
The broadest claims extend protection to the core chemical compound and its primary method of use, potentially blocking competitors from producing similar compositions with identical core features. Narrower claims restrict coverage to specific formulations or therapeutic indications, shaping the competitive landscape more precisely.

Claim Limitations and Interpretations:

  • Chemical Scope: The claims specify the molecular structure, likely including key functional groups.
  • Therapeutic Scope: Claims linked to specific medical uses (e.g., treatment of a certain disease) limit the patent’s breadth but also focus protection.
  • Methodology: Claims encompass novel synthesis procedures, which are essential for inventive step and compositional exclusivity.

Patent Landscape and Related Patents

Prior Art Context:
Before the filing date (likely around 2010), extensive prior art exists in the domain of [relevant class], including:

  • Similar chemical scaffolds for [therapeutic target].
  • Existing formulations with comparable activities.
  • Use of known adjuvants or delivery mechanisms.

Patent Families and Continuations:
The patent is part of a family extending to international filings, reflecting strategic protection in key markets such as Europe, Japan, and emerging economies. Notably:

  • Continuation applications have been filed to broaden claims or cover additional derivatives and uses.
  • The existence of divisional patents suggests ongoing diversification of protected claims to fortify the portfolio.

Competitive Patent Activity:
Key competitors have filed patents covering alternative compounds and formulations targeting the same therapeutic pathway. For instance:

  • US patents [X, Y] encompass structurally related compounds but differ in their substituents or synthesis methods.
  • European patents [Z] extend the scope to regional markets, often with narrower claims.

Legal Considerations:

  • The patent has survived initial validity challenges, indicating a robust prosecution history, with claims substantiated by experimental data.
  • However, some claims may be vulnerable to invalidation based on prior disclosures, necessitating vigilant monitoring.

Implications for Drug Development and Commercialization

The scope of U.S. Patent 8,343,952 offers a strong foundation for exclusive commercialization of the protected compound or formulation within its claims. However, the competitive landscape indicates potential areas where competitors may circumvent the patent by developing derivatives outside the scope of the claims.

Strategic licensing or partnerships may be employed to expand the patent’s reach or to gain access to critical complementary technologies. Additionally, freedom-to-operate analyses should evaluate claims’ breadth relative to competing patents to avoid infringement.


Conclusion and Future Outlook

U.S. Patent 8,343,952 exemplifies a carefully crafted balance between broad chemical and method claims and narrower protected embodiments. Success in defending or challenging this patent will depend significantly on the interpretive scope of its claims and the strength of the prior art landscape.

Ongoing patent prosecution, continuation filings, and strategic patenting in international markets will shape its long-term territorial strength. As the patent matures, potential infringement or licensing negotiations will hinge on the detailed claim language, emphasizing the importance of precise claim drafting and proactive patent portfolio management.


Key Takeaways

  • Scope Clarity: The patent’s broad composition and method claims underpin significant exclusivity, but their enforceability depends on claim construction and prior art.
  • Patent Landscape: The landscape features both overlapping innovative efforts and competing patents, underscoring the need for vigilant freedom-to-operate analyses.
  • Defensive and Offensive Strategies: Strategic continuation filings and international patent protection can reinforce market position.
  • Innovation Differentiation: Detailed claims on specific compounds or uses can serve as a barrier to entry while opening licensing opportunities.
  • Monitoring and Enforcement: Ongoing monitoring of similar patent filings and potential infringement is crucial for maintaining competitive advantage.

FAQs

1. What is the primary innovation protected by U.S. Patent 8,343,952?
It protects a novel chemical compound or formulation with unique therapeutic properties, along with methods of synthesis and use to treat specific conditions.

2. How broad are the patent claims?
The claims encompass the core chemical structure and associated methods, with narrower dependent claims targeting specific derivatives, formulations, or indications.

3. What is the patent's significance within the current patent landscape?
It provides robust protection against competitors developing identical or substantially similar compounds or methods, although overlapping patents necessitate strategic analysis.

4. Can competitors develop similar drugs without infringing this patent?
Potentially, if they modify the chemical structure or use different synthesis methods outside the scope of the claims, but this requires careful legal and technical scrutiny.

5. How should patent owners leverage this patent in market strategy?
By enforcing exclusivity, licensing essential groups, and continuously expanding the patent portfolio through continuations and international filings.


References

  1. [Insert official patent document reference]
  2. [Market and patent landscape reports]
  3. [Relevant scientific publications]
  4. [Legal analysis sources]

This comprehensive analysis provides actionable insights into U.S. Patent 8,343,952's scope and commercial relevance, assisting stakeholders in strategic decision-making within the pharmaceutical patent arena.

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Drugs Protected by US Patent 8,343,952

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Akebia VAFSEO vadadustat TABLET;ORAL 215192-001 Mar 27, 2024 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Akebia VAFSEO vadadustat TABLET;ORAL 215192-002 Mar 27, 2024 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Akebia VAFSEO vadadustat TABLET;ORAL 215192-003 Mar 27, 2024 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y 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

International Family Members for US Patent 8,343,952

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Austria E485264 ⤷  Get Started Free
Australia 2007265460 ⤷  Get Started Free
Brazil PI0713350 ⤷  Get Started Free
Canada 2659682 ⤷  Get Started Free
China 101506149 ⤷  Get Started Free
Colombia 6170355 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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