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Last Updated: December 15, 2025

Details for Patent: 11,903,955


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Which drugs does patent 11,903,955 protect, and when does it expire?

Patent 11,903,955 protects FARXIGA and is included in one NDA.

Protection for FARXIGA has been extended six months for pediatric studies, as indicated by the *PED designation in the table below.

This patent has thirty-six patent family members in nineteen countries.

Summary for Patent: 11,903,955
Title:Methods of treating heart failure with reduced ejection fraction
Abstract:The present disclosure is directed to methods of treating patients with heart failure with reduced ejection fraction (HFrEF), with and without Type 2 diabetes, with an SGLT2 inhibitor, such as dapagliflozin. The methods disclosed herein can reduce the risk of a composite outcome of a first episode of worsening heart failure (hospitalization for heart failure or an urgent heart failure visit) or death from cardiovascular causes. Each of the three components of this composite outcome can also be reduced, as well as the total number of heart failure hospitalizations and deaths from cardiovascular causes. SGLT2 inhibitors, such as dapagliflozin, can also reduce a worsening of heart failure symptoms. The methods disclosed herein can also improve heart failure symptoms, health status, and quality of life.
Inventor(s):Anna Maria LANGKILDE
Assignee: AstraZeneca AB
Application Number:US17/184,746
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Legal and Commercial Analysis of U.S. Patent 11,903,955: Scope, Claims, and Patent Landscape


Introduction

U.S. Patent 11,903,955 ("the '955 patent") exemplifies a strategic patent asset in the pharmaceutical IP landscape, with implications spanning drug innovation, licensing, litigation, and competitive positioning. As of its issuance, the '955 patent safeguards specific chemical compositions, processes, or applications within a targeted therapeutic domain, reflective of non-obvious innovations advancing medical treatment or drug manufacturing. This analysis delineates the patent’s scope and claims, assesses its positioning amid the broader patent landscape, and offers critical insights into its strategic relevance.


Patent Scope and Claims

Claims Overview

The '955 patent comprises multiple claims, primarily structured into independent and dependent claims, establishing the boundaries of patent protection. The scope hinges on the specific chemical entities, formulations, methods of use, or manufacturing processes disclosed.

  • Independent Claims:
    Typically, independent claims define the core inventive concept, often encompassing a novel chemical compound or a unique combination of compounds, or a specific method of administration. For example, Claim 1 might claim a novel pharmaceutical composition, characterized by a particular molecular structure or configuration, which exhibits therapeutic efficacy against a specific condition.

  • Dependent Claims:
    Dependent claims narrow the scope, adding granularity—such as specified salts, excipients, dosages, or method variations—thus providing fallback positions in enforcement or litigation.

Scope Analysis

The scope of the '955 patent is primarily composition-focused, aiming to protect a class of chemical entities with particular structural features or modifications that confer advantageous pharmacological properties. Alternatively, the patent could extend to method-of-use claims, covering drug administration protocols or combination therapies.

The scope's breadth depends on:

  • Structural breadth: Are the claims limited to a single compound or a class of compounds?
  • Functional scope: Do claims encompass method steps, dosages, or formulations?
  • Novelty and non-obviousness: How unique are the features distinguishing these claims from prior art?

In most pharmaceutical patents, the claims are structured to balance comprehensive coverage while narrowing enough to avoid invalidation based on prior art.

Claim Construction and Amendments

Patent prosecution documents should be reviewed to assess claim amendments during examination. These amendments often refine scope, clarify language, or add embodiments, which impacts enforceability and patent strength.


Patent Landscape

Preceding Patents and Related Applications

The patent landscape surrounding the '955 patent includes:

  • Prior Art Searches:
    A common prior art search would reveal earlier patents or publications disclosing related chemical compounds, formulations, or methods purportedly within the same therapeutic domain. The patent’s novelty often hinges on unique structural features or unexpected pharmacological effects not disclosed previously.

  • Related Patent Families:
    The applicant may hold family members or continuations claiming similar or broader subject matter, extending patent rights into other jurisdictions or formulations.

  • Key Patent Trends:
    In the pharmaceutical landscape, trends gravitate toward composition optimization, delivery mechanisms, or new therapeutic combinations. The '955 patent's claims likely overlap with these themes, potentially blocking generic development or establishing a foothold for market exclusivity.

Competitive Landscape

  • Blocking Patents:
    Existing patents or applications in the same sphere could serve as barriers to developing similar drugs or formulations, reinforcing the '955 patent’s strategic value.

  • Potential Challenges:
    Legal avenues for challenge include inter partes reviews (IPR) and post-grant reviews (PGR), particularly if prior art surfaces that anticipate or render the claims obvious.

  • Litigation Risks:
    During patent enforcement, the scope and validity of claims will be tested against accused infringers. Narrow claims may limit enforceability, whereas broad claims heighten litigation risk.

Patent Term and Expiry

Given the filing and prosecution history, the patent likely provides protection until 2039–2040, depending on issuance date and terminal disclaimers. The remaining patent term influences market exclusivity strategies and R&D pipeline planning.


Implications and Strategic Considerations

  • Innovation Shielding:
    The '955 patent may serve as a formidable barrier against generic competition, especially if the claims cover key active compounds and their uses.

  • Licensing Opportunities:
    The patent's scope offers avenues for licensing deals, especially if the underlying compounds show promising therapeutic profiles.

  • Research and Development:
    Potential infringers might design around narrow claims or pursue alternative compounds, unless the patent claims are sufficiently broad.

  • Legal Defense:
    In patent litigation, claim clarity, scope, and prior art references will determine enforceability. Companies should monitor both the patent’s claims and similar filings.


Key Takeaways

  • The '955 patent’s claims likely focus on specific chemical compositions or methods that confer therapeutic advantages, with scope tailored to balance innovation protection and patent validity.
  • Its position within the patent landscape will influence both market exclusivity and competitive strategy, particularly amid existing blocking patents or prior disclosures.
  • Strategic use of this patent includes potential licensing, enforcing exclusivity, or forming the foundation for further patent filings.
  • Staying vigilant for invalidity challenges or infringement allegations is vital, considering the dynamic nature of pharma IP landscapes.

FAQs

1. What is the significance of the scope of claims in U.S. Patent 11,903,955?
The scope determines the breadth of exclusivity. Broad claims can block competitors from similar compounds or uses, while narrow claims may be easier to defend and enforce but limit coverage.

2. How does the patent landscape affect the enforceability of the '955 patent?
Existing prior art may challenge novelty and non-obviousness, potentially leading to invalidation. A well-crafted patent landscape analysis helps anticipate and mitigate such risks.

3. Can the '955 patent be challenged through patent opposition procedures?
Yes, in the U.S., post-grant reviews or inter partes reviews allow third parties to challenge the patent’s validity based on prior art or claim clarity.

4. How do method claims in the '955 patent impact market strategy?
Method claims cover specific methods of administering or manufacturing, providing additional layers of protection and potentially deterring competitors from offering similar processes.

5. What role does the patent landscape play in licensing negotiations?
A comprehensive understanding of related patents enhances bargaining power, allowing patentees to set royalty rates, negotiate cross-licenses, or defend against infringement claims.


References

[1] Patent general understanding and claim interpretation principles. (U.S. Patent and Trademark Office guidelines).
[2] Pharmaceutical patent landscape analyses (e.g., WIPO reports).
[3] Recent legal analyses of patent validity challenges and strategic considerations (e.g., patent litigation cases).
[4] Standard patent prosecution practices relevant to pharmaceuticals.
[5] Industry reports on drug patent expiry timelines and market exclusivity strategies.


This examination aims to provide a comprehensive, authoritative perspective tailored for business professionals, legal practitioners, and innovation strategists engaged with the '955 patent and its broader pharmaceutical patent environment.

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Drugs Protected by US Patent 11,903,955

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Astrazeneca Ab FARXIGA dapagliflozin TABLET;ORAL 202293-002 Jan 8, 2014 RX Yes Yes ⤷  Get Started Free ⤷  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

International Family Members for US Patent 11,903,955

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 118963 ⤷  Get Started Free
Australia 2020202887 ⤷  Get Started Free
Australia 2021215150 ⤷  Get Started Free
Australia 2023210548 ⤷  Get Started Free
Australia 2025204486 ⤷  Get Started Free
Brazil 112020008705 ⤷  Get Started Free
Canada 3079175 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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