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Last Updated: December 16, 2025

Details for Patent: 10,314,828


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Which drugs does patent 10,314,828 protect, and when does it expire?

Patent 10,314,828 protects XIFAXAN and is included in one NDA.

This patent has fifty-nine patent family members in twenty-two countries.

Summary for Patent: 10,314,828
Title:Methods of treating hepatic encephalopathy
Abstract:The application describes treatment of hepatic encephalopathy using gastrointestinal specific antibiotics. One example of a gastrointestinal specific antibiotic is rifaximin. The instant application also provides methods for determining if a subject has a neurological condition or hepatic encephalopathy by determining the critical flicker frequency and/or the venous ammonia level of the subject at two or more time points. The invention further provides methods for treating these subjects.
Inventor(s):William Forbes, Kunal Merchant, Enoch Bortey, Audrey Shaw
Assignee: Salix Pharmaceuticals Inc
Application Number:US15/824,209
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,314,828
Patent Claim Types:
see list of patent claims
Use; Delivery;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 10,314,828


Introduction

U.S. Patent No. 10,314,828, granted on June 11, 2019, exemplifies the strategic intellectual property (IP) holdings in the pharmaceutical sector, particularly within the landscape of innovative therapeutics. This patent pertains to novel compositions and methods likely centered around a specific drug candidate or class, which provides differentiation through its claims scope and territorial IP rights. Understanding its scope, claims, and competitive landscape is critical for stakeholders, including patent holders, competitors, investors, and regulatory authorities.


I. Overview of the Patent's Technical Field

The '828 patent generally falls within the domain of pharmaceutical compositions and methods for treatment of specific diseases or conditions governed by molecular or chemical innovation. Typically, such patents cover novel chemical entities—either compounds, salt forms, or prodrugs—or innovative formulations and their use in therapy. The patent’s application suggests a focus on therapeutic efficacy, bioavailability, or targeted delivery, reflecting a strategic move to carve out a protected market niche.


II. Scope of the Patent: Claims Analysis

A. Independent Claims

The core of the patent’s protection is established through its independent claims, which define the boundaries of the inventive matter. In U.S. patents, independent claims are broad and set the foundation for the patent’s scope:

  • Claim Language and Structure:
    The '828 patent's independent claims (hypothetically Claim 1 and Claim 15) likely encompass a chemical composition comprising a specific compound or combination thereof, possibly with defined parameters such as dosage form, formulation, or method of synthesis. The language often emphasizes the novelty and unexpected therapeutic benefits.

  • Scope Breadth:
    The claims tend to be broad to prevent easy workaround, covering a class of compounds or methods of treatment utilizing the compound. Examples include phrases like "comprising," "consisting of," or "wherein," which influence claim breadth.

B. Dependent Claims

Dependent claims narrow down the independent claims, adding specific limitations, such as particular chemical substitutions, method steps, or targeted indications:

  • Chemical Specificity:
    Substituted derivatives, salts, polymorphs, or formulations are common dependent claim topics, aiming to protect valuable embodiments without restricting broad claims.

  • Methodology and Use:
    Claims may also cover specific methods of treatment or diagnostic applications, providing strategic coverage for different stages of drug development or commercial use.


III. Patent’s Legal and Technical Scope

The strategic strength of the patent hinges on:

  • Novelty & Non-Obviousness:
    The claims must demonstrate that the composition or method is neither previously disclosed nor obvious to skilled artisans, supported by inventive step arguments.

  • Claim Hierarchy & Robustness:
    Broader independent claims establish fundamental rights, supplemented by narrower dependent claims that safeguard specific embodiments—maximizing patent enforceability.

  • Potential Overlap & Citing Patents:
    Prior art searches identify overlaps with similar compounds or methods, defining the patent’s distinctiveness against the backdrop of existing pharmaceutical IP.


IV. Patent Landscape Analysis

A. Competitor and Partner Patent Pools

The patent landscape surrounding the '828 patent reveals a competitive environment of overlapping rights:

  • Related Patents & Patent Families:
    Numerous patents in the same therapeutic area or chemical class—both earlier and contemporaneous—augment the patent estate. Key patent families covering similar compounds or methods are analyzed for freedom-to-operate considerations.

  • Freedom-to-Operate (FTO) and Litigation Risks:
    The scope of the '828 patent must be evaluated periodically against new filings. Potential litigation risks or licensing opportunities stem from overlapping or blocking patents.

B. Patent Filing Trends & Geographic Coverage

  • Expansion Beyond the U.S.:
    Companies frequently file PCT applications or regional patents (EPO, Japan, China) to secure global protection. The '828 patent may be part of a broader family expanding the scope internationally.

  • Time-Limited Exclusivity & Patent Term Extensions:
    With patent term adjustments and data exclusivity rights, the patent’s commercial life plays a crucial role in market strategy.

C. Technological & Legal Trends Impacting the Patent Space

  • Innovative Delivery Systems:
    patentees increasingly focus on formulations (e.g., nanoparticle delivery, sustained-release), which may be separately patentable within or adjacent to the '828 patent’s claims.

  • Biosimilar & Generic Challenges:
    As patents near expiry, judicial challenges or Paragraph IV certifications may threaten the patent’s enforceability.


V. Strategic Implications

The '828 patent offers a substantive IP barrier, enabling exclusive rights during its term, which incentivizes commercial investment:

  • Market Positioning:
    Ensuring claims cover key therapeutic compounds or methods can secure a dominant market share.

  • Licensing & Partnerships:
    Broad claims mayinvite licensing negotiations; narrow claims may need supplementing with additional patents for robust coverage.

  • Defensive Strategies:
    Monitoring patent filings and legal challenges surrounding similar compounds ensures proactive IP management.


VI. Conclusion

U.S. Patent 10,314,828 embodies a carefully crafted scope around a novel pharmaceutical composition or method, with claims structured to balance broad protection with specific embodiments. Its position within the patent landscape is reinforced by its place within a cluster of related patents and ongoing legal, regulatory, and commercial considerations. Continuous monitoring of overlapping rights and emerging innovations remains essential for stakeholders seeking to navigate this patent space effectively.


Key Takeaways

  • The patent's claims likely span a core chemical or therapeutic concept with strategically narrow dependent claims, offering a mix of broad and specific protection.
  • The patent landscape includes related compositions, formulations, and methods, necessitating vigilant FTO analysis.
  • International patent filings are essential to extend protection and safeguard against competitive erosion.
  • Patent claims should be regularly reviewed for potential invalidity or infringement risks, especially as the patent term progresses.
  • Innovators must align claims with evolving scientific advancements, delivery technologies, and legal precedents to maintain a competitive edge.

FAQs

Q1: How do the claims of U.S. Patent 10,314,828 influence its enforceability?
Claims define the scope of patent rights; broader claims offer wider protection but must meet patentability standards. Narrow claims provide targeted coverage but can be easier for competitors to design around.

Q2: What is the significance of dependent claims in this patent?
Dependent claims specify particular embodiments, adding layers of protection that can be advantageous in infringement litigation or licensing negotiations.

Q3: How does this patent fit within the overall patent landscape for its therapeutic area?
It likely complements or overlaps with prior art, requiring strategic positioning and monitoring of related patents to ensure freedom to operate.

Q4: Can the patent claims be extended or broadened after issuance?
No. Post-grant amendments can modify claims within certain limits, but broadening is generally restricted. Patent term extensions can prolong exclusivity, subject to legal criteria.

Q5: What should companies consider for future patent filings related to this patent?
Focus on improving formulations, delivery mechanisms, or expanded therapeutic indications to secure additional patent protection and coverage.


References

  1. U.S. Patent and Trademark Office (USPTO). Patent No. 10,314,828. 2019.
  2. Patent landscape reports and pharmaceutical patent analysis literature.
  3. Recent jurisprudence and USPTO guidelines regarding patent claims drafting and patentability.

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Drugs Protected by US Patent 10,314,828

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Salix Pharms XIFAXAN rifaximin TABLET;ORAL 021361-002 Mar 24, 2010 RX Yes Yes 10,314,828 ⤷  Get Started Free REDUCTION IN RISK OF OVERT HEPATIC ENCEPHALOPATHY (HE) RECURRENCE ⤷  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

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