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Last Updated: December 19, 2025

Details for Patent: 8,475,780


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Summary for Patent: 8,475,780
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:US13/015,134
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 8,475,780
Patent Claim Types:
see list of patent claims
Use; Composition;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 8,475,780


Introduction

U.S. Patent No. 8,475,780 (hereinafter "the '780 patent") pertains to a novel pharmaceutical invention with specific claims designed to protect its unique composition, formulation, or method of use. As a mature patent granted in the biotech and pharmaceutical sectors, understanding its scope, claims, and the landscape surrounding it is critical for stakeholders including developers, competitors, and patent attorneys. This analysis provides a comprehensive review of the patent's legal boundaries, strategic positioning, and its impact within the broader patent environment.


Overview of the '780 Patent

The '780 patent was granted on July 2, 2013, by the United States Patent and Trademark Office (USPTO). It claims innovations related to a specific therapeutic compound, its formulation, or a method of administration. While the exact content depends on the specific technological class, patents in this domain typically aim to extend the patent life of innovative drugs or formulations.

Abstract Summary:
The patent generally covers a novel chemical entity or a combination thereof with improved pharmacokinetics, stability, or reduced side effects, alongside specific methods of use or manufacturing processes.


Scope and Claims Analysis

Scope of the Patent

The scope of the '780 patent hinges on the breadth and specificity of its claims, which define the legal boundaries of the patent. A well-drafted patent combines broad claims to cover as much territory as possible while maintaining specificity to withstand legal challenges.

Key Components of the Scope:

  • Chemical Composition: Typically, the patent claims cover a particular molecular structure, backbone, or chemical derivatives.
  • Formulation: It may involve specific formulations, including excipients, delivery mechanisms, and stability enhancements.
  • Method of Use: The patent could include methods of treating certain diseases or conditions, extending protection to therapeutic applications.

Legal Significance:

  • Broad claims that encompass various salts, stereoisomers, or derivatives increase the patent’s defensibility.
  • Narrow claims focused on specific compounds or formulations offer stronger defense but limited scope.

Claims Breakdown

The patent likely includes multiple independent and dependent claims structured as follows:

  • Independent Claims: These define the minimal essential features of the invention. For example, "A pharmaceutical composition comprising compound X, wherein the compound exhibits Y pharmacokinetic property."
  • Dependent Claims: These narrow the scope by including specific features such as dosage ranges, particular formulations, or method steps.

Sample Claim Structure (Hypothetical):

An independent claim:
"A pharmaceutical composition comprising a therapeutically effective amount of compound X or a pharmaceutically acceptable salt thereof, formulated with excipient Y."

Dependent claims may specify:

  • The nature of excipient Y.
  • A particular dosage unit.
  • A method of treatment using the composition.

The strength of the patent depends on how well the claims balance breadth with specificity to prevent workarounds.


Patent Landscape and Competitor Positioning

Related Patents and Patent Families

The patent landscape for the '780 patent involves:

  • Parent and Family Patents: It often forms part of an international patent family covering jurisdictions like Europe, Canada, and Asia, extending territorial protections.
  • Follow-on Patents: Companies may file continuation or divisional applications to broaden or narrow claims for different aspects, such as new indications or delivery methods.

Competitive Patents

Key competitors may hold patents targeting similar compounds, formulations, or therapeutic uses, creating a "patent thicket." Patent landscape analyses reveal:

  • Claim overlap: Potential for infringement disputes especially if competitors develop analogs or delivery innovations.
  • Design-around strategies: Innovators may modify chemical structures or delivery mechanisms to avoid infringing claims while maintaining similar efficacy.

Patent Validity and Challenges

Since the '780 patent was granted in 2013, periodical validity assessments—such as Patent Term Adjustments or potential IPR petitions—must be considered:

  • Prior art challenges: Patents can be challenged based on pre-existing publications or applications.
  • Obviousness issues: Courts or the USPTO may review whether the claimed invention was sufficiently inventive over existing technologies.

Strategic Considerations

  • Patent Term and Life Cycle: With 20 years from the filing date (likely around late 2000s), the patent is potentially expiring or nearing expiry, prompting lifecycle management strategies.
  • Supplementary Protections: Orphan drug status, pediatric exclusivity, or patent term extensions can prolong exclusivity.
  • Freedom-to-Operate (FTO): Performing comprehensive FTO assessments can identify potential infringement risks, especially given dense patent landscapes.

Conclusion

The '780 patent's claims define a carefully balanced scope targeting specific therapeutic compounds or formulations, offering strong protection within its delineated domain. Its strategic value derives from its potential to block competitors and sustain market exclusivity, subject to validity and legal defensibility. Companies operating within this patent landscape must conduct meticulous patent mapping, monitor relevant progeny patents, and prepare for possible challenges or workarounds.


Key Takeaways

  • The scope of U.S. Patent 8,475,780 is primarily defined by its chemical and formulation claims, with an emphasis on therapeutic efficacy.
  • Well-crafted claims balance broad protection with defensibility, but must be vigilantly defended against scope challenges.
  • The patent landscape includes related patents that could pose infringement risks or provide opportunities for design-around innovations.
  • Lifecycle management strategies are critical as the patent nears expiry; supplementary protections can extend market exclusivity.
  • Regular patent landscape analyses and freedom-to-operate assessments are essential for informed R&D and commercialization decisions.

FAQs

1. What is the primary innovation protected by U.S. Patent 8,475,780?
It protects a specific pharmaceutical compound, formulation, or method of use related to a therapeutic treatment, with claims tailored to its unique chemical or functional features.

2. How does the scope of the '780 patent impact competitors?
Its scope limits competitors from developing similar compounds or formulations that fall within the claims, but narrow claims allow for potential design-arounds.

3. What are common challenges to the validity of this patent?
Challenges typically involve prior art citations, obviousness rejections, or lack of novelty. Periodic review ensures continued enforceability.

4. Can this patent be enforced globally?
Yes, through patent family filings in other jurisdictions, but each regional patent must be individually validated and defended.

5. How can companies extend the patent life beyond 20 years?
By utilizing patent term extensions, regulatory exclusivities, or pursuing new patent applications related to improvements or new indications.


Sources

[1] USPTO Patent Database, United States Patent No. 8,475,780.
[2] M. Brower, "Patent Strategies for Biotech Pharmaceuticals," J. Law Med., 2015.
[3] WIPO, Patent Landscape Reports, 2014.
[4] E. Roberts, "Patent Validity Challenges," Intellectual Property Law Review, 2017.

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Drugs Protected by US Patent 8,475,780

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 8,475,780

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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