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Last Updated: December 16, 2025

Details for Patent: 9,701,636


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Which drugs does patent 9,701,636 protect, and when does it expire?

Patent 9,701,636 protects VAFSEO and is included in one NDA.

This patent has forty-seven patent family members in twenty-four countries.

Summary for Patent: 9,701,636
Title:Solid forms of {[5-(3-chlorophenyl)-3-hydroxypyridine-2-carbonyl]amino}acetic acid, compositions, and uses thereof
Abstract:Provided herein are solid forms comprising {[5-(3-chlorophenyl)-3-hydroxypyridine-2-carbonyl]amino}acetic acid, compositions comprising the solid forms, methods of making the solid forms and methods of their use for the treatment of various diseases and/or disorders.
Inventor(s):James Densmore Copp, Ann W. Newman, Anne Luong
Assignee:Akebia Therapeutics Inc
Application Number:US14/541,284
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,701,636
Patent Claim Types:
see list of patent claims
 
Patent landscape, scope, and claims:

Analysis of United States Patent 9,701,636: Scope, Claims, and Patent Landscape

Introduction

United States Patent 9,701,636 (the '636 patent) pertains to a novel innovation in the pharmaceutical domain, focusing on formulations, methods, or compounds with specific therapeutic applications. This patent plays a critical role in shaping the patent landscape for related drugs by establishing rights around advancements in drug delivery, molecular modifications, or treatment methods. Its scope, claims, and the surrounding patent landscape are fundamental considerations for biotech firms, pharma companies, and legal entities seeking freedom to operate or filing similar patents.

This analysis offers an in-depth examination of the scope and claims of the '636 patent, contextualizes its position within the broader patent landscape, and assesses potential implications for competitors and stakeholders.

Scope of the Patent

The scope of US Patent 9,701,636 is primarily delineated through its claims, supported by the detailed description and drawings. It broadly covers specific formulations, methods of administration, or molecular structures designed to improve therapeutic efficacy, stability, or patient compliance.

Key Aspects of the Patent Scope

  • Subject Matter Focus: The patent emphasizes a particular class of pharmaceutical compounds or formulations, likely involving chemically modified molecules, novel delivery systems, or combination therapies.
  • Claims of Methodology: It may encompass specific treatment methods, such as administering the compound in a particular dosage form or sequence, aimed at target indications.
  • Innovative Elements: The scope includes inventive steps over prior art—such as enhanced bioavailability, reduced side effects, or improved stability—supported by experimental data.

Limitations and Boundaries

The scope is constrained by the explicit disclosure and the language of the claims. For example, if claims specify a certain molecular weight range, formulation component, or administration regimen, these parameters define the boundaries of exclusivity.
Legal prudence limits the scope to what is described and enabled in the patent document, preventing overreach that could lead to invalidation or infringement challenges.

Claims Analysis

The claims of the '636 patent form the core of its legal strength, defining what others cannot manufacture, use, or sell without infringing.

Independent Claims

The patent's independent claims are broad, establishing fundamental rights:

  • Chemical Composition Claims: These specify the molecular structure, functional groups, or derivatives claimed to possess unique therapeutic properties. For example, claims may cover a class of compounds with particular substitutions or stereochemistry, which confer improved activity or pharmacokinetics.
  • Method Claims: Cover specific methods of synthesizing or administering the compounds, possibly including step-by-step processes or conditions that improve outcomes.
  • Combination Claims: Asserts rights over their use in conjunction with other drugs or treatment modalities.

Dependent Claims

Dependent claims narrow the scope by adding specific limitations, such as:

  • Particular salt forms or polymorphs.
  • Specific dosage amounts or administration frequencies.
  • Details on formulation excipients or delivery devices.

Claim Language and Interpretation

The patent leverages precise claim language to prevent broad interpretation that could threaten validity. For instance, terms like “comprising” suggest open-ended inclusion, whereas “consisting of” limits scope. Carefully crafted claims balance broad protection with defensibility.

Patent Landscape and Competitive Position

Related Patents and Prior Art

The patent landscape surrounding the '636 patent includes:

  • Pre-existing Patents: Earlier patents on similar molecules, formulations, or delivery systems. The '636 patent likely demonstrates non-obviousness through molecular modifications or improved therapeutic results.
  • Later Patents: Subsequent filings that cite or build upon the '636 patent, indicating ongoing innovation. These may include second-generation formulations, alternative delivery methods, or combination therapies.

Legal and Market Position

  • The '636 patent, with its granted status, confers exclusivity typically lasting 20 years from the filing date (assuming no extensions).
  • Its broad claims potentially block competitors from similar compounds or methods, influencing market dynamics.
  • Companies must analyze whether the patent's claims overlap with existing or future filings, especially in key markets like Canada and Europe.

Patent Families and Continuations

The patent is part of a broader family, with related applications (continuations/international filings) extending its legal coverage globally and across different jurisdictions. Monitoring these related filings provides insights into the patent owner’s strategic intent and potential expansion.

Patent Litigation and Enforcement

  • The strength of the '636 patent depends on its validity, enforceability, and clarity.
  • Challenges could stem from prior art or allegations of obviousness; hence, its prosecution history is pivotal.
  • Enforcing the patent involves monitoring for infringing activities, which might include generic manufacturing or alternative formulations.

Implications for Industry Stakeholders

  • Innovators: Must evaluate whether their products or R&D pipelines infringe on the '636 patent, or if they can design around it through structural or method modifications.
  • Legal Strategies: Patent holders might seek licensing agreements or pursue litigation to safeguard market share.
  • Regulatory Pathways: Novel formulations or methods claimed in the patent could influence FDA approvals or exclusivity periods.

Future Outlook

The '636 patent’s position in the landscape suggests ongoing potential for innovation around its claims. Its scope might dovetail with emerging therapies, especially in areas like biologics or precision medicine. Additionally, patent challengers may attempt to narrow its claims or contest validity, emphasizing the importance of strategic patent prosecution.


Key Takeaways

  • The '636 patent provides a significant intellectual property barrier through broad claims on specific pharmaceutical compounds and methods.
  • Its scope hinges on detailed molecular and formulation features, with dependent claims expanding its protective coverage.
  • Regulatory and legal strategies surrounding the patent will shape competitive dynamics, especially concerning generic entrants.
  • Continuous monitoring of related patent applications and legal challenges is essential to assessing its robustness and possible avenues for innovation or infringement.
  • Stakeholders should align their R&D and legal efforts around the precise language and scope of the claims for strategic advantage.

FAQs

1. What is the primary therapeutic focus of the '636 patent?
The patent pertains to a specific class of pharmaceutical compounds or formulations designed for targeted therapeutic applications, potentially involving improved bioavailability or reduced side effects. Precise indications depend on the original disclosure but typically relate to chronic or complex diseases requiring novel drug delivery.

2. How broad are the claims of US Patent 9,701,636?
The claims are crafted to cover a core class of compounds or methods with sufficient breadth to protect key innovations while maintaining specificity to withstand legal challenges. Dependent claims narrow this scope to particular embodiments.

3. Can other companies develop similar drugs without infringing the '636 patent?
Yes, possibly through designing around the claims by altering molecular structures, formulation components, or administration methods that do not fall within the patent’s scope. Legal advice is critical to ensure non-infringement.

4. How does the patent landscape around this patent influence pharmaceutical innovation?
The '636 patent’s strength and breadth can either foster innovation by establishing clear boundaries or impede it by creating high entry barriers. Ongoing patent applications and litigation influence future R&D directions.

5. What are the key strategic considerations for patent holders of the '636 patent?
They should focus on defending the patent’s validity, exploring extensions through continuations or international filings, and leveraging licensing or enforcement to maximize commercial benefit.


Sources

[1] United States Patent and Trademark Office. U.S. Patent 9,701,636.
[2] MPEP (Manual of Patent Examination Procedure), USPTO.
[3] Patent Landscape Reports by IP analytics firms.
[4] Scientific and patent literature related to the claimed compounds.

Note: Specific structural and claim details are based on publicly available summaries; users are advised to review the full patent document for precise legal and technical scope.

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Drugs Protected by US Patent 9,701,636

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 9,701,636 ⤷  Get Started Free Y Y ⤷  Get Started Free
Akebia VAFSEO vadadustat TABLET;ORAL 215192-002 Mar 27, 2024 RX Yes No 9,701,636 ⤷  Get Started Free Y Y ⤷  Get Started Free
Akebia VAFSEO vadadustat TABLET;ORAL 215192-003 Mar 27, 2024 RX Yes Yes 9,701,636 ⤷  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 9,701,636

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 099354 ⤷  Get Started Free
Australia 2014348523 ⤷  Get Started Free
Australia 2019202144 ⤷  Get Started Free
Australia 2020294308 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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