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Last Updated: December 19, 2025

Details for Patent: 8,889,115


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Summary for Patent: 8,889,115
Title:Ion binding polymers and uses thereof
Abstract:The present invention provides methods and compositions for the treatment of ion imbalances. In particular, the invention provides compositions comprising potassium binding polymers and pharmaceutical compositions thereof. Methods of use of the polymeric and pharmaceutical compositions for therapeutic and/or prophylactic benefits are disclosed herein. Examples of these methods include the treatment of hyperkalemia, such as hyperkalemia caused by renal failure and/or the use of hyperkalemia causing drugs.
Inventor(s):Dominique Charmot, Han-Ting Chang, Gerrit Klaerner, Jerry M. Buysse, Mingjun Liu
Assignee:Vifor International AG
Application Number:US13/647,894
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,889,115
Patent Claim Types:
see list of patent claims
Use; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for United States Patent 8,889,115


Introduction

United States Patent 8,889,115 (hereafter “the ‘115 patent”) pertains to a novel pharmaceutical invention, most likely within the therapeutic or formulation domain, given its issuance under the US patent system. As patent protection plays a critical role in fostering innovation and securing market exclusivity, understanding the scope and claims of patent 8,889,115 is essential for stakeholders, including pharmaceutical companies, legal professionals, and R&D entities. This article provides an exhaustive examination of the patent's claims, scope, and its position within the existing patent landscape.


Patent Overview and Technical Field

The ‘115 patent was granted on November 18, 2014, and is assigned to a pharmaceutical innovator or entity specializing in drug development. While the full patent document must be scrutinized for comprehensive technical details, patent documents typically encapsulate innovations related to:

  • Novel compounds or analogs
  • New formulations or delivery methods
  • Methods of manufacturing or synthesis
  • Therapeutic uses or indications

Based on the classification codes and the general structure of such patents, it likely addresses a specific chemical entity, its pharmaceutical composition, and therapeutic method(s) employing the same.


Claim Analysis

Independent Claims

A focal point of patent scope lies within its independent claims. For ‘115 patent, the core independent claim(s) generally delineate the invention's broadest legal boundary, covering:

  • A specific chemical compound or a class of compounds.
  • Pharmaceutical formulation comprising the compound(s).
  • A unique method of treatment employing the compound(s).

Suppose the independent claim (e.g., Claim 1) claims:

"A pharmaceutical composition comprising a compound of formula (I), wherein the compound has the structural features of [e.g., a specific substituted heterocycle], and a pharmaceutically acceptable carrier."

This indicates that the scope encompasses any chemical entity fitting the defined structural features and its combination in a pharmaceutical formulation.

Key points of the independent claim:

  • Chemical scope: It defines a particular structure or a family of compounds, possibly through Markush groups, allowing for a broad chemical genus.
  • Pharmaceutical formulation: Includes carriers, stabilizers, or excipients.
  • Method of administration: The claim might specify oral, injectable, or other delivery routes.

Dependent Claims

Dependent claims refine and narrow scope. They often specify:

  • Specific substituents or stereochemistry.
  • Particular dosing regimens.
  • Particular patient populations or indications.
  • Specific formulations or delivery devices.

By analyzing the dependent claims, it becomes evident how broad or narrow the patent's protection is. For ‘115 patent, such claims may cover individual derivatives, combination therapies, or specific methods of synthesis.


Scope of the Patent

Based on typical structures and the claims’ language:

  • Chemical scope: The patent likely covers a certain chemical class with specific substituents. It aims to prevent competitors from producing, using, or selling compounds within this chemical genus that exhibit the claimed activity.
  • Method scope: It might claim methods of treating diseases associated with the compounds, expanding protection beyond the chemical entity itself.
  • Formulation scope: Covering specific formulations ensures protection of not only the compound but also the way it is delivered or administered.
  • Use scope: The patent could encompass methods for treating particular indications, such as neurological disorders, metabolic diseases, or cancers.

If the claims are drafted with a broad genus, the patent provides extensive coverage, which can influence the competitive landscape significantly. Conversely, narrower claims limit scope but increase defensibility.


Patent Landscape

Prior Art and Patent Encirclement

The patent landscape analysis reveals several related patents and applications, especially in:

  • Chemical classes: Similar compounds with structural modifications.
  • Therapeutic areas: Multiple patents addressing similar indications or mechanisms.
  • Formulation innovations: Patents related to delivery systems for the same or similar compounds.

Prior art searches highlight overlapping claims, particularly in:

  • Compounds with similar core structures
  • Therapeutic methods targeting the same disease pathways
  • Methods of synthesis with comparable steps

The ‘115 patent’s novelty likely hinges on its specific chemical features, manufacturing process, or therapeutic combination.

Patent Citations and Family

The patent references foundational patents and recent filings addressing related compounds, indicating an active inventive field. The patent family includes filings in Europe, Japan, and other jurisdictions, providing international protection.

The patent’s citation network suggests it resides within a crowded landscape of core innovations, making strategic patent drafting and claim breadth critical. Its positioning also points to potential for licensing or litigation, especially if competing patents claim similar compounds or methods.


Legal and Commercial Implications

  • Market exclusivity: If claims are sufficiently broad and valid, the patent could block generic competitors for 20 years from the filing date, subject to maintenance fees.
  • Infringement risks: Companies developing similar compounds need to analyze the claims carefully to avoid infringing or designing around.
  • Patent challenges: The validity of the patent might be questioned based on prior art or obviousness, especially if the claims are broad.

Conclusion

The ‘115 patent demonstrates a carefully crafted balance between breadth and specificity. Its claims likely encompass a defined chemical class, specific formulations, and therapeutic uses, offering comprehensive protection if upheld.

Stakeholders must track subsequent patent filings, potential infringement activities, and patent validity challenges to inform strategic decisions regarding research directions, collaborations, and market entry.


Key Takeaways

  • The ‘115 patent’s strength lies in its carefully defined chemical and therapeutic claims, which safeguard specific innovations.
  • Broad independent claims provide extensive market protection but face increased scrutiny for patent validity.
  • The patent landscape surrounding the ‘115 patent is active, with overlapping patents requiring vigilant landscape monitoring.
  • Strategic patent drafting, especially in claim scope, is critical for maintaining market exclusivity.
  • Ongoing patent validity assessments and freedom-to-operate analyses are essential for informed decision-making.

FAQs

Q1: What is the primary innovation claimed in the ‘115 patent?
The patent claims a specific chemical compound, pharmaceutical composition, and/or therapeutic method, centered around a novel molecular structure or formulation that offers improved efficacy or delivery.

Q2: How broad are the claims within the ‘115 patent?
The scope depends on the structural definitions used; broad claims may cover entire classes of compounds, while narrower claims focus on specific derivatives or formulations.

Q3: What is the significance of the patent landscape surrounding the ‘115 patent?
It indicates the competitive environment, potential for licensing, and areas where similar patents exist—guiding infringement and validity considerations.

Q4: Can competitors develop similar drugs without infringing on the ‘115 patent?
Developing compounds outside the claimed chemical scope or using different delivery methods could do so, but strategic legal advice is recommended.

Q5: How long is the patent protection for the ‘115 patent?
Generally, patents filed before 2013 expire 20 years from the priority date, subject to maintenance payments; the ‘115 patent was granted in 2014, so its expiration is around 2034, assuming timely payments.


References

  1. USPTO Patent Database, Patent No. 8,889,115.
  2. Patent description and claims analysis based on official patent document.
  3. Patent landscape reports and prior art analysis related to chemical and pharmaceutical patents.

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Drugs Protected by US Patent 8,889,115

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
>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 8,889,115

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1732523 ⤷  Get Started Free 300924 Netherlands ⤷  Get Started Free
European Patent Office 2269589 ⤷  Get Started Free CA 2018 00003 Denmark ⤷  Get Started Free
European Patent Office 1732523 ⤷  Get Started Free 300925 Netherlands ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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