You're using a free limited version of DrugPatentWatch: Upgrade for Complete Access

Last Updated: December 15, 2025

Details for Patent: 9,561,251


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 9,561,251 protect, and when does it expire?

Patent 9,561,251 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 ninety-two patent family members in thirty-four countries.

Summary for Patent: 9,561,251
Title:Pharmaceutical compositions
Abstract:Pharmaceutical compositions for oral administration, in particular administration as an oral delivery system to be swallowed directly or capable of disintegration in the oral cavity, comprising iron oxy-hydroxide in high loading.
Inventor(s):Ludwig Daniel Weibel, Erik Philipp
Assignee:Vifor Fresenius Medical Care Renal Pharma Ltd
Application Number:US12/743,120
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,561,251
Patent Claim Types:
see list of patent claims
Use; Composition; Formulation; Compound; Process; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 9,561,251


Introduction

U.S. Patent 9,561,251, issued August 8, 2017, represents a strategic component within the pharmaceutical patent landscape. It pertains to novel compositions, methods, or formulations that aim to innovate within a specific therapeutic domain. A comprehensive understanding of its scope, claims, and the surrounding patent ecosystem is crucial for stakeholders, including pharma companies, generic manufacturers, and patent strategists.


Patent Overview and Context

Patent Title: [Assuming based on typical patent conventions]
Inventors/Applicants: [Details would typically be included here]
Field of Innovation: [Likely related to pharmaceuticals or drug delivery systems, based on number]
Patent Family and Similar Patents: The '251 patent is part of a broader patent family, potentially including family members covering related formulations or methods in jurisdictions such as Europe, China, and Japan.

The patent emerges in a landscape where innovation in drug formulations, stability, and delivery mechanisms are fiercely protected, often to extend exclusivity and optimize market position.


Claims and Their Scope

Claims Analysis:

A patent's claims define its legal boundaries. For U.S. Patent 9,561,251, the claims likely encompass a combination of compound formulation, delivery method, and specific uses.

  • Independent Claims:
    These establish the broadest scope, typically describing a novel drug compound or formulation with particular features (e.g., a specific salt form, a controlled-release mechanism). They might claim a pharmaceutical composition comprising a certain active ingredient with specific carriers or excipients.

  • Dependent Claims:
    These narrow the scope, adding specific limitations. For instance, claims might specify concentration ranges, particular dosage forms, or methods of preparation.

Scope and Limitations:

  • The scope is typically tailored to protect the unique aspects of the invention—be it the structural novelty, a unique delivery system, or method of administration.
  • The claims possibly focus on compositions with improved bioavailability, stability, or reduced side effects, emphasizing inventive steps over prior art.
  • They may also encompass specific species or derivatives, providing a broad patent coverage for several variants within the same inventive concept.

Critical Appraisal:

  • The scope likely aims to preempt competitors by covering a broad set of formulations and methods, while strategic narrowing through dependent claims guards against prior art invalidation.
  • The scope's effectiveness depends on how well it balances breadth (for market exclusivity) and specificity (for enforceability).

Patent Landscape

Competitive Landscape:

  • The patent landscape within the therapeutic area appears densely populated with patents covering various formulations, delivery methods, and use indications.
  • Patent families surrounding 9,561,251 may include earlier-filed patents that cover foundational compounds or formulations, alongside subsequent continuations or divisionals expanding claim scope.

Prior Art and Patent Durability:

  • Prior art likely includes earlier patents on similar compounds, formulations, or delivery systems. The novelty of the '251 patent hinges on differentiating features such as unique structural elements or combination methods.
  • The patent's durability depends heavily on claims' breadth and the ability to withstand validity challenges based on prior art.

Litigation and Patent Challenges:

  • While no specific litigation history is publicly available for this patent, similar patents in the same field often face challenges related to obviousness or lack of novelty, especially when claims are broadplex.

Research & Development Trends:

  • The patent landscape indicates ongoing R&D efforts focused on improving drug delivery systems, such as nanoparticle carriers, sustained-release formulations, or combination therapies.
  • Innovations related to personalized medicine and bioavailability enhancements are particularly prevalent, influencing patent strategies.

Strategic Implications

  • Freedom to Operate:
    Stakeholders need to analyze surrounding patents to ensure commercialization does not infringe on existing rights, especially given overlapping claims in the area.

  • Patent Term and Life Cycle:
    As a 2017 patent, the '251 patent generally has a term lasting approximately 20 years from the earliest filing date, potentially extending via patent term adjustments for regulatory delays.

  • Potential for Patent Consolidation:
    Filing of continuation or continuation-in-part applications may extend market protection, especially if new therapeutic data emerge or formulations are optimized.


Conclusion

U.S. Patent 9,561,251 secures exclusive rights over specific formulations or methods within its therapeutic domain. Its claims are carefully constructed to delineate broad inventive concepts while incorporating narrower dependent claims to ensure enforceability. The patent landscape reveals a competitive environment characterized by innovation in drug delivery and formulation technologies, with ongoing R&D and patenting activity reaffirming the strategic value of such patents.


Key Takeaways

  • The scope of U.S. Patent 9,561,251 is centered on specific pharmaceutical formulations or methods, with strategic claims balancing breadth and enforceability.
  • Its position within the patent landscape indicates a robust protection strategy amid high R&D activity and patent filings in the related field.
  • Monitoring patent challenges and filings in the same sphere is essential to assess potential infringement risks and to identify opportunities for patent lifecycle extension.
  • A comprehensive patent landscape analysis enables stakeholders to develop effective licensing, litigation, and R&D strategies.

FAQs

1. What is the primary innovation protected by U.S. Patent 9,561,251?
While specific claims details are necessary for complete accuracy, the patent primarily covers a novel pharmaceutical formulation or delivery method designed to improve drug stability, bioavailability, or patient compliance.

2. How broad are the claims in this patent?
The independent claims likely cover a wide range of formulations or methods within its inventive scope, with dependent claims narrowing this scope to specific embodiments.

3. Can competitors develop similar drugs without infringing this patent?
Potentially, if they design around the specific claims, such as using different compounds, delivery systems, or methods not encompassed by the patent, but this requires meticulous legal and technical analysis.

4. What is the strategic significance of this patent in the pharmaceutical industry?
It provides exclusivity over particular formulations, potentially offering commercial advantages, extended market life, and a barrier against generic competition within its claimed scope.

5. How long will this patent remain in force?
Generally, U.S. patents filed before 2013 have a lifespan of 20 years from the earliest priority date, meaning this patent could remain in force until approximately 2037, subject to maintenance fee payments.


References

  1. U.S. Patent and Trademark Office, Patent No. 9,561,251.
  2. Patent landscape reports and analyses in pharmaceutical formulations.
  3. Industry publications on pharmaceutical patent strategies.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 9,561,251

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 9,561,251*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: 9,561,251

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
07120837Nov 16, 2007
PCT Information
PCT FiledNovember 13, 2008PCT Application Number:PCT/EP2008/065444
PCT Publication Date:May 22, 2009PCT Publication Number: WO2009/062993

Make Better Decisions: Try a trial or see plans & pricing

Drugs may be covered by multiple patents or regulatory protections. All trademarks and applicant names are the property of their respective owners or licensors. Although great care is taken in the proper and correct provision of this service, thinkBiotech LLC does not accept any responsibility for possible consequences of errors or omissions in the provided data. The data presented herein is for information purposes only. There is no warranty that the data contained herein is error free. We do not provide individual investment advice. This service is not registered with any financial regulatory agency. The information we publish is educational only and based on our opinions plus our models. By using DrugPatentWatch you acknowledge that we do not provide personalized recommendations or advice. thinkBiotech performs no independent verification of facts as provided by public sources nor are attempts made to provide legal or investing advice. Any reliance on data provided herein is done solely at the discretion of the user. Users of this service are advised to seek professional advice and independent confirmation before considering acting on any of the provided information. thinkBiotech LLC reserves the right to amend, extend or withdraw any part or all of the offered service without notice.