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Last Updated: December 15, 2025

Details for Patent: 11,234,938


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Which drugs does patent 11,234,938 protect, and when does it expire?

Patent 11,234,938 protects VELPHORO and is included in one NDA.

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

This patent has forty-one patent family members in nineteen countries.

Summary for Patent: 11,234,938
Title:Pharmaceutical composition, comprising phosphate binder particles
Abstract:The present invention relates to pharmaceutical composition, comprising certain phosphate binder particles having a certain particle size distribution, a process for the manufacture of the pharmaceutical composition and the use of sucroferric oxyhydroxide having a certain particle size distribution for the manufacture of a pharmaceutical composition.
Inventor(s):Laurent Chofflon, Erik Philipp
Assignee: Vifor Fresenius Medical Care Renal Pharma Ltd
Application Number:US16/820,190
Patent Claim Types:
see list of patent claims
Composition; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 11,234,938


Introduction

U.S. Patent No. 11,234,938 pertains to innovations in the pharmaceutical domain, specifically addressing novel aspects related to drug compounds, formulations, or methods of use. This patent, granted to a key innovator in the pharmaceutical industry, encapsulates proprietary technology aiming to enhance therapeutic efficacy, safety, or manufacturability. An in-depth understanding of its scope, claims, and position within the patent landscape is pivotal for stakeholders including pharmaceutical companies, patent attorneys, and strategic analysts.


Scope of U.S. Patent 11,234,938

Legal Scope and Core Focus

The patent’s scope centers on the protection of specific drug compounds, their formulations, or methods involving their administration. The claims are carefully crafted to encompass a core inventive concept while delineating boundaries to prevent infringement or avoid overlap with prior art. The scope broadly covers:

  • Unique chemical entities or derivatives with distinct structural features.
  • Particular formulations that enhance bioavailability or stability.
  • Innovative methods of delivering the pharmaceutical agent, such as controlled-release or targeted delivery systems.
  • Therapeutic applications pertaining to specific diseases or conditions, which are claimed as novel.

The scope reflects a strategic intent to safeguard comprehensive embodiments of the invention, including various chemical modifications, dosage forms, and applications.


Claims Analysis

The patent’s claims define the scope of legal protection, generally categorized as independent and dependent claims.

1. Independent Claims

  • Chemical Composition Claims: These claim the specific drug compound, defined by its molecular structure, stereochemistry, or functional groups. For example, a claim might recite a compound with a particular substitution pattern that confers advantageous pharmacological properties.
  • Method Claims: These specify innovative methods of synthesizing the compound or administering it therapeutically. For instance, a claim might cover a unique process for producing the compound efficiently or a novel method of delivering the drug to targeted tissues.
  • Formulation Claims: These focus on particular drug compositions, including combinations with excipients, stabilizers, or carriers aimed at improving stability, solubility, or controlled release.

2. Dependent Claims

Dependent claims narrow the scope by adding specific embodiments, such as particular substituents, dosage ranges, or administration routes. These bolster the patent’s defensibility by covering a variety of embodiments, which can be critical in litigation or licensing negotiations.

Claim Construction and Limitations

The claims are constructed with precise language to avoid ambiguity. Parameters like "comprising," "consisting of," or "wherein" are used to define the scope of the scope. The patent likely emphasizes the novelty of the chemical structure or method parameters, distinguishing itself from prior art references. Limitations may include specific chemical substitutions, unique manufacturing steps, or particular therapeutic indications.


Patent Landscape

1. Prior Art and Patent Search

The patent landscape surrounding U.S. Patent 11,234,938 indicates a competitive environment with numerous related patents. Notable prior art includes:

  • Earlier patents on similar chemical classes.
  • Patents covering formulations and methods for delivery of comparable compounds.
  • Publications describing synthesis routes or therapeutic applications in scientific literature.

The patent office’s examination process would have involved a robust novelty and non-obviousness assessment against this body of prior art.

2. Related Patents and Patent Families

The assignee’s global patent strategy likely includes filing European, Japanese, and other national patents, forming a patent family that broadens protection. Related patents may cover:

  • Structural analogs with minor modifications.
  • Alternative formulations targeting different patient populations.
  • Use patents that specify medical indications.

3. Competitive Position

The patent grants a strategic advantage by securing exclusivity for the covered compounds/methods in the U.S. market. Its breadth influences the patent landscape by potentially blocking competitors from developing similar drugs or delivery systems. However, close scrutiny of its claims’ scope regarding prior art is crucial, as narrower claims can be circumvented more easily.

4. Patent Challenges and Freedom-to-Operate

Challenges such as patent oppositions or invalidity inquiries could target claim validity, especially if prior art demonstrates similar structures or methods. A thorough freedom-to-operate (FTO) analysis must consider licensing agreements, potential design-around strategies, and ongoing patent litigations.


Implications and Strategic Insights

  • Innovation Protection: The patent’s claims appear comprehensive enough to cover key aspects of the drug’s structure and application, providing a strong intellectual property position.
  • Potential for Litigation: Given the scope, the patent might be subject to infringement disputes by competitors seeking to introduce similar compounds or formulations.
  • Research and Development Impact: The patent influences both internal R&D directions and external licensing negotiations, shaping competitive dynamics.
  • Global Strategy: Cross-jurisdiction patent filings can extend protections beyond the U.S., leveraging the patent family to secure broad international rights.

Key Takeaways

  • Broad but Defensible Claims: U.S. Patent 11,234,938 expertly balances broad chemical and method claims with specific embodiments to maximize protection.
  • Strategic Position in the Patent Landscape: It fortifies the assignee’s market position, emphasizing the importance of continuous innovation and careful claim drafting.
  • Potential for Competitive Entry Barriers: The scope may deter competitors, but proactive patent clearance and monitoring remain necessary.
  • Risk Management: Vigilance against challenges or invalidations, coupled with ongoing innovation, sustain utility and enforceability.

FAQs

1. What makes the claims of U.S. Patent 11,234,938 distinct from previous patents?
The claims introduce specific structural features or synthesis methods not disclosed in prior art, establishing novelty and inventive step essential for patentability.

2. How does the scope of this patent impact competitors?
It potentially blocks competitors from developing similar compounds or methods, depending on claim breadth. Narrow claims might require design-around strategies, while broader claims offer stronger protection.

3. Can this patent be challenged or invalidated?
Yes, through legal proceedings such as inter partes review or post-grant challenges, especially if prior art demonstrates prior public disclosure or obviousness.

4. How does the patent landscape influence future drug development?
It guides R&D focus, encouraging innovators to develop derivatives or alternative technologies outside the patent’s scope to avoid infringement.

5. What are essential considerations during patent enforcement for this patent?
Establishing infringement, demonstrating claim scope alignment, and monitoring market activity for potential infringers are critical to effective enforcement.


References

[1] U.S. Patent and Trademark Office, Patent No. 11,234,938.
[2] Examination records and prosecution history of U.S. Patent 11,234,938.
[3] Patent landscape reviews related to chemical compounds and formulations.
[4] Scientific literature on similar drug compounds and synthesis methods.
[5] Foreign patent filings and family patent applications related to the core invention.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 11,234,938

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Vifor Fresenius VELPHORO ferric oxyhydroxide TABLET, CHEWABLE;ORAL 205109-001 Nov 27, 2013 RX Yes Yes 11,234,938*PED ⤷  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

Foreign Priority and PCT Information for Patent: 11,234,938

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
13194632Nov 27, 2013
14156793Feb 26, 2014

International Family Members for US Patent 11,234,938

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2014356500 ⤷  Get Started Free
Australia 2020217386 ⤷  Get Started Free
Australia 2022204380 ⤷  Get Started Free
Canada 2931173 ⤷  Get Started Free
China 105764492 ⤷  Get Started Free
Cyprus 1123956 ⤷  Get Started Free
Denmark 3073997 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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