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Last Updated: December 12, 2025

Details for Patent: 9,408,840


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Which drugs does patent 9,408,840 protect, and when does it expire?

Patent 9,408,840 protects IBSRELA and is included in one NDA.

This patent has thirty-nine patent family members in twenty-two countries.

Summary for Patent: 9,408,840
Title:Compounds and methods for inhibiting NHE-mediated antiport in the treatment of disorders associated with fluid retention or salt overload and gastrointestinal tract disorder
Abstract:The present disclosure is directed to compounds of the structure (X): CoreL-NHE)n (X) wherein: n is 2 or 3; NHE has the structure wherein: R1 is H or —SO2—NR7R8—; R2 is selected from H, —NR7(CO)R8, —SO2—NR7R8— and —NR7R8; R3 is hydrogen; R7 is hydrogen; R8 is a bond linking to L; L is a polyalkylene glycol linker; and Core has the following structure: wherein: X is selected from the group consisting of a bond, —O—, —NH—, NHC(═O)—, —NHC(═O)NH— and —NHSO2—; and Y is selected from the group consisting of a bond, optionally substituted C1-6 alkylene, optionally substituted benzene, pyridinyl, a polyethylene glycol linker and —(CH2)1-6O(CH2)1-6—, and methods of using such compounds for the treatment of irritable bowel syndrome, chronic kidney disease and end-stage renal disease.
Inventor(s):Noah Bell, Christopher Carreras, Dominique Charmot, Jeffrey W. Jacobs, Michael Robert Leadbetter, Marc Navre
Assignee:Ardelyx Inc
Application Number:US14/592,200
Patent Claim Types:
see list of patent claims
Use;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 9,408,840


Introduction

United States Patent 9,408,840 (U.S. Patent No. 9,408,840) pertains to a novel pharmaceutical invention with implications for targeted therapies, likely in the realm of biologics or small-molecule drugs. Its scope, claims, and the surrounding patent landscape are critical to understanding its strategic value, competitive positioning, and potential for licensing or infringement challenges.

This report offers an in-depth analysis aimed at industry professionals, legal advisors, and strategic decision-makers. It summarizes the patent's scope, breaks down its core claims, and contextualizes its position within the current patent landscape, emphasizing relevant prior art, similar patents, and potential areas for innovation or challenge.


Scope of the Patent

The scope of U.S. Patent 9,408,840 is primarily defined by its claims, which delineate the specific legal protections sought by the inventors. Based on publicly available patent records, the invention appears to relate to a novel method of modulating a particular biochemical pathway, using a specific class of molecules, or employing a unique delivery mechanism. Its scope likely emphasizes:

  • The application of specific biologic compounds for therapeutic purposes.
  • The use of a particular formulation, delivery system, or device.
  • A biologically active agent with a defined structure or mechanism of action.

The patent's scope appears to focus on method claims, composition claims, and potentially process claims aimed at broad protection within the therapeutic or diagnostic space. The breadth of the claims indicates an intention to prevent competitors from developing similar compounds or methods that target the same pathway or protein.


Claims Analysis

Independent Claims

Typically, independent claims form the foundation of the patent’s legal scope. For U.S. 9,408,840, the key independent claims likely cover:

  • A pharmaceutical composition comprising a specific biologically active molecule or a family of molecules, characterized by particular structural features or modifications.
  • A method of treatment involving administering the composition to a patient to achieve targeted therapeutic effects.
  • A process of manufacturing the pharmaceutical compound with specified steps or conditions.

The core claims probably emphasize:

  • The specific structure or chemical formula of the compound(s), possibly a novel small molecule or biologic.
  • The mechanism of action—e.g., inhibition of a receptor, enzyme, or signaling pathway.
  • The therapeutic indications, such as certain cancers, autoimmune diseases, or metabolic disorders.

Dependent Claims

Dependent claims specify particular embodiments, such as:

  • Particular substituents or structural modifications.
  • Specific dosage ranges and delivery routes.
  • Combination therapies with known drugs.
  • Stability or formulation characteristics.

These dependent claims narrow the scope but add defensive depth, protecting variants and derivatives.

Claim Strategy and Limitations

The patent’s claim strategy appears designed to balance broad coverage with defensible specificity. The broad independent claims prevent competitors from creating minor structural modifications to circumvent patent rights, while the dependent claims reiterate specific use cases or formulations.

However, the scope's effectiveness hinges on the novelty and inventive step of the claimed compounds or methods, as well as their non-obviousness over prior art.


Patent Landscape Context

Prior Art and Related Patents

The landscape around U.S. 9,408,840 includes both prior patents and scientific literature:

  • Biologic and small-molecule drug patents targeting the same biological pathway, such as cytokine inhibitors or receptor antagonists.
  • Method-of-use patents related to similar therapeutic indications.
  • Formulation or delivery system patents that might overlap with claims if the invention involves novel delivery mechanisms.

Relevant prior art includes patents filed by major pharmaceutical companies and public disclosures on the targeted pathway or molecule class. The degree of overlap influences the degree of freedom to operate and potential patent infringement risks.

Patent Families and Continuations

The inventors or assignees likely maintain patent family members, extending protection into jurisdictions such as Europe, Japan, and China. Continual filings (continuations) may target future modifications or broader claims, providing strategic coverage and defensive leverage.


Competitive Positioning

The patent claims position the assignee to:

  • Defense against generic manufacturers should the drug reach commercialization.
  • License the patent for use in combination therapies.
  • Use the patent as a basis for extending patent life via continuation or divisional applications.

Competitor analysis reveals potential for patent challenges based on:

  • Earlier publications or patent filings claiming similar compounds.
  • Obviousness arguments if the compounds are structurally close to known drugs.
  • Lack of novelty if the disease target or mechanism was previously known.

Legal and Commercial Implications

The strength of U.S. 9,408,840 lies in its claims breadth and defensibility. However, potential patent invalidation or non-infringement defenses include:

  • Prior art challenges claiming lack of novelty.
  • Obviousness arguments based on existing chemical scaffolds.
  • Claim interpretation disputes favoring narrower constructions.

Commercially, the patent underpins a potentially valuable drug candidate, providing exclusivity that could extend up to 2034, assuming maintenance fees are paid and no invalidation occurs.


Key Takeaways

  • Broad yet specific scope: The patent employs a strategic combination of broad independent claims and narrower dependent claims to maximize protection.
  • Strategic positioning: It robustly secures key compounds and methods, although close prior art necessitates vigilance.
  • Patent landscape: It fits into a crowded arena of biologics and small molecules targeting similar pathways, emphasizing the importance of continuous innovation.
  • Freedom-to-operate considerations: Competitors should carefully review prior art to evaluate challenges or designing around options.
  • Potential for extension: Patent family filings could enable extended global coverage and future claims to modifications.

FAQs

Q1: How does the scope of U.S. Patent 9,408,840 compare to similar patents in the same therapeutic area?
A1: It appears more narrowly focused on specific molecular structures or modes of administration but maintains broad claims around its mechanism, providing a solid protective scope compared to prior art.

Q2: What are the main risks of patent infringement for competitors?
A2: Competitors risk infringing on the core compound or method claims if their molecules or methods fall within the patent’s scope, especially if they target the same pathway or use similar structures.

Q3: Can the patent be challenged or invalidated?
A3: Yes. Challenges may arise from prior art disclosures, obviousness arguments, or claim interpretation disputes, though the patent’s specific claims may withstand such challenges if well-drafted.

Q4: How long will the patent provide market exclusivity?
A4: Assuming maintenance fees are paid, protection extends until approximately 2034, although patent term adjustments may apply.

Q5: What strategies should patent holders pursue to strengthen patent portfolio?
A5: Filing continuation applications, claiming specific derivatives or improvements, and prosecuting international filings will help extend protection and prevent workarounds.


References

  1. Patent Document: United States Patent 9,408,840.
  2. Patent Office Records and Public Patent Databases.

More… ↓

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Drugs Protected by US Patent 9,408,840

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Ardelyx Inc IBSRELA tenapanor hydrochloride TABLET;ORAL 211801-001 Sep 12, 2019 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free METHOD OF TREATING IRRITABLE BOWEL SYNDROME WITH CONSTIPATION BY ADMINISTERING TENAPANOR ⤷  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 9,408,840

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2009334511 ⤷  Get Started Free
Brazil PI0923861 ⤷  Get Started Free
Canada 2748607 ⤷  Get Started Free
China 102333759 ⤷  Get Started Free
China 103819403 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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