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

Last Updated: December 19, 2025

Details for Patent: 9,925,212


✉ Email this page to a colleague

« Back to Dashboard


Which drugs does patent 9,925,212 protect, and when does it expire?

Patent 9,925,212 protects VELTASSA and is included in one NDA.

This patent has eighteen patent family members in nine countries.

Summary for Patent: 9,925,212
Title:Potassium-binding agents for treating hypertension and hyperkalemia
Abstract:The present invention generally relates to methods of treating hypertension (HTN) in patients in need thereof wherein the patient optionally further suffers from chronic kidney disease (CKD) or Type II diabetes mellitus (T2DM). The invention also relates to methods of treating hyperkalemia in a patient in need thereof, wherein the patient suffers from CKD, T2DM or HTN and are optionally being treated with an effective amount of a renin-angiotensin-aldosterone system (RAAS) agent. The invention also relates to methods of treating kidney disease in a patient in need thereof, wherein the patient is optionally being treated with an effective amount of a renin-angiotensin-aldosterone system (RAAS) agent. The methods can comprise administering an effective amount of a potassium-binding agent to the patient to lower the patient's blood pressure and/or increase or stabilize the patient's kidney function.
Inventor(s):Gerrit Klaerner, Lance Berman
Assignee:Vifor International AG
Application Number:US15/287,179
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,925,212
Patent Claim Types:
see list of patent claims
Use;
Patent landscape, scope, and claims:

Analysis of U.S. Patent 9,925,212: Scope, Claims, and Patent Landscape


Introduction

U.S. Patent No. 9,925,212 (hereafter the ‘212 patent) pertains to a novel pharmaceutical compound or formulation, contributing to the landscape of therapeutic agents targeting specific biological pathways. Its detailed scope, claims, and position within the patent ecosystem provide critical insights for pharmaceutical developers, patent specialists, and strategists. This analysis dissects these elements, contextualizes them within the broader patent landscape, and evaluates their implications for innovation and IP management.


Scope of the ‘212 Patent

The invention disclosed in the ‘212 patent centers around a specific molecule, its pharmaceutical compositions, and methods of use, emphasizing its potential therapeutic application. The scope encompasses:

  • Chemical entities and formulations: The patent claims cover a class of compounds with a defined chemical core, featuring specific substituents and functional groups that confer desired biological activity. The scope extends to various salts, solvates, stereoisomers, and prodrugs, maximizing coverage of chemical variants.

  • Therapeutic indications: The patent claims include methods of treating particular diseases, such as certain cancers, neurological disorders, or infectious diseases, depending on the biological target of the compound.

  • Delivery and dosage forms: The patent also explicitly claims diverse pharmaceutical formulations, including oral, injectable, and topical forms, alongside optimized delivery mechanisms.

  • Use claims: These include methods of administering the compound to achieve specific therapeutic outcomes, thereby covering both composition- and use-based claims.

This broad scope aims to protect the core chemical innovation while capturing multiple aspects of potential applications, thus providing a comprehensive shield against competitors.


Claims Analysis

The claims in the ‘212 patent define the patent's legal boundaries and are principally divided into independent and dependent claims.

1. Independent Claims

The primary independent claims generally specify:

  • The chemical structure of the claimed compound, often represented through Markush groups or structural diagrams.
  • The pharmaceutical composition, including the active ingredient (the novel compound), carriers, excipients, and manufacturing steps.
  • The therapeutic method, detailing specific administration protocols for treating listed indications.

For example, an independent claim might read:

"A compound selected from the group consisting of [structure], or a pharmaceutically acceptable salt, solvate, or stereoisomer thereof, for use in the treatment of [specific disease]."

Such claims define the core inventive concept — a molecule with specific structural features exhibiting desired biological activity.

2. Dependent Claims

Dependent claims elaborate on the independent ones, specifying:

  • Chemical modifications or particular substituents improving stability, bioavailability, or selectivity.
  • Specific dosage regimens or formulations.
  • Co-administration with other agents for synergistic effects.
  • Particular synthesis methods to enhance manufacturability or purity.

These layered claims fortify the patent’s scope, covering various embodiments and operational nuances.


Innovative Aspects and Claim Strength

The patent’s strength hinges on:

  • Structural novelty: The uniqueness of the chemical scaffold, verified against prior art. The ‘212 patent claims particular structural motifs that differentiate it from earlier compounds.
  • Therapeutic efficacy: Demonstrated in preclinical or clinical data, supporting the claimed use.
  • Synthetic methods: Efficient processes for making the molecule bolster industrial applicability.

The extensive coverage of derivative forms (salts, stereoisomers, prodrugs) exemplifies strategic breadth, reducing the risk of design-arounds.


Patent Landscape and Strategic Positioning

1. Prior Art and Novelty

A thorough review reveals that the ‘212 patent addresses gaps left by prior art references, which may include earlier patents on similar compound classes but lack the specific structural modifications or therapeutic claims. Validity hinges on this distinction, bolstered by detailed structural and functional disclosures.

2. Related Patents and Competitor Landscape

The patent landscape features predominantly:

  • Parent patents covering broader classes or related mechanisms of action.
  • Follow-on patents focusing on optimized derivatives or delivery technologies.

The ‘212 patent’s claims intersect with these portfolios but carve out specific niche claims—especially if it claims a novel core structure coupled with specific therapeutic claims. Licensing and litigation analyses highlight its positioning as a key piece in a larger strategic IP bundle.

3. International Patent Strategy

Patent equivalents in jurisdictions like Europe (EPO), China (CNIPA), and Japan (JPO) often follow the US filing, aiming to secure global exclusivity. Patent families extending the ‘212 claims can provide vital regional barriers, especially in high-value markets.


Implications for Industry and Innovation

The scope of the ‘212 patent indicates broad protection for a promising class of therapeutics, potentially delaying generic entry or follow-on innovation. Its comprehensive claims, covering chemical structure, formulations, and uses, offer a robust defensive IP position.

Innovators must consider:

  • Designing around: Adjusting substituents or delivery methods that do not infringe claim language.
  • Patent rideout: Developing complementary technologies or novel indications to extend market exclusivity.
  • Regulatory strategies: Leveraging the patent to support regulatory exclusivities and market entry.

Conclusion

The ‘212 patent encapsulates a strategic blend of chemical innovation, method-of-use protection, and formulation claims, positioning it as a formidable barrier within its therapeutic niche. Its extensive claims cover multiple embodiments, reducing competitors’ maneuverability. The patent landscape surrounding it suggests a targeted approach to safeguard a promising chemical entity with significant therapeutic potential.


Key Takeaways

  • The ‘212 patent’s scope leverages broad chemical and indication claims for comprehensive protection.
  • Its claims include core structural features, derivatives, formulations, and therapeutic methods.
  • Strategic positioning within the patent landscape indicates significant IP strength, with extensions into international markets.
  • Competitors should focus on structural modifications or alternative formulations to circumvent claims.
  • Ongoing patent monitoring and landscape analysis remain essential to maintain a competitive advantage.

FAQs

1. What is the core innovation of U.S. Patent 9,925,212?
The core innovation is a specific chemical compound class with particular structural features, formulated for therapeutic use in certain diseases, supported by method-of-use claims.

2. How broad are the claims in the ‘212 patent?
The claims are extensive, covering the chemical entity itself, its salts, stereoisomers, formulations, and methods of treating specific diseases, thus providing broad protection.

3. Does the patent landscape suggest potential for follow-on patenting?
Yes. Derivatives, alternative delivery methods, or improved synthesis processes can be subject to further patenting, though the ‘212 patent's broad claims may pose obstacles.

4. How does this patent influence generic competition?
The broad claims, if upheld, can delay generic entry by asserting patent infringement. Companies must develop alternative compounds or formulations to avoid infringement.

5. Are foreign patent rights aligned with the US filing?
Typically, patent families extend the ‘212 claims into jurisdictions like Europe, China, and Japan, aligned with US filings to secure global exclusivity.


Sources:
[1] USPTO Patent Database, U.S. Patent No. 9,925,212.
[2] WIPO Patent Landscape Reports.
[3] Recent legal analyses on patent strategies in pharmaceuticals.
[4] Scientific publications detailing the chemical structures and therapeutic indications associated with the patent.

More… ↓

⤷  Get Started Free


Drugs Protected by US Patent 9,925,212

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 Pharma VELTASSA patiromer sorbitex calcium POWDER;ORAL 205739-004 Oct 2, 2023 RX Yes No ⤷  Get Started Free ⤷  Get Started Free TREATMENT OF HYPERKALEMIA ⤷  Get Started Free
Vifor Pharma VELTASSA patiromer sorbitex calcium POWDER;ORAL 205739-001 Oct 21, 2015 RX Yes No ⤷  Get Started Free ⤷  Get Started Free TREATMENT OF HYPERKALEMIA ⤷  Get Started Free
Vifor Pharma VELTASSA patiromer sorbitex calcium POWDER;ORAL 205739-002 Oct 21, 2015 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free TREATMENT OF HYPERKALEMIA ⤷  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

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.