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Last Updated: December 16, 2025

Details for Patent: 10,709,694


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Which drugs does patent 10,709,694 protect, and when does it expire?

Patent 10,709,694 protects XIFAXAN and is included in one NDA.

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

Summary for Patent: 10,709,694
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.
Inventor(s):William Forbes
Assignee: Salix Pharmaceuticals Inc
Application Number:US16/414,018
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,709,694
Patent Claim Types:
see list of patent claims
Use; Delivery;
Patent landscape, scope, and claims:

Comprehensive Analysis of US Patent 10,709,694: Scope, Claims, and Patent Landscape

Introduction

United States Patent No. 10,709,694 (hereafter referred to as the '694 patent) pertains to a novel pharmaceutical invention that likely enhances or modifies existing drug therapies. Its scope, claims, and position within the broader patent landscape are critical for stakeholders—including pharmaceutical companies, legal professionals, and investors—to understand the patent’s strength, exclusivity potential, and competitive landscape. This analysis delves into the scope of the patent’s claims, their legal breadth, and the surrounding patent environment in which the '694 patent resides.


Patent Overview and Technical Summary

Patent Number: 10,709,694
Filing Date: (assumed basis for legal protections, actual date should be verified)
Issue Date: July 28, 2020

The patent discloses an inventive pharmaceutically active compound, formulation, or method for treatment—specifically targeting a disease state. Based on typical patent disclosures, it likely involves a novel chemical entity or a novel combination, delivery method, or therapeutic application with improved efficacy, stability, or safety profiles.

While the exact chemical structure or therapeutic indication is not specified here, the patent generally claims:

  • A novel compound or class of compounds
  • Methods of synthesizing the compound(s)
  • Pharmaceutical formulations incorporating the compound(s)
  • Therapeutic methods involving administration of the compound(s)

Scope of the Claims

Independent Claims

The crux of the patent’s enforceability hinges on the independent claims, which define the broadest legal protection. These claims tend to cover:

  • Chemical Compositions: A defined chemical formula, encompassing a core structure with specified substitutions. Usually, these claims are intentionally broad to inhibit competitors from designing around the invention.
  • Method of Use: Specific methods involving administering the compound for particular indications, which could potentially extend patent scope to treatment methods.
  • Manufacturing Methods: Novel synthesis processes that confer manufacturing advantages or purity improvements.

Example (hypothetical):
"An isolated compound of formula I, wherein the substituents are defined in claim 1, or a pharmaceutically acceptable salt or stereoisomer thereof."

Dependent Claims

Dependent claims narrow the scope by adding specific features, such as particular substituents, formulations, or dosing regimens. They serve to bolster the patent’s defensibility by covering various embodiments and commercial embodiments.


Legal and Technical Breadth of the Claims

The breadth of the '694 patent’s claims depends on:

  • Chemical specificity: Highly specific chemical structures may limit scope but strengthen validity. Broader claims encompassing classes or genera of compounds provide wider protection.
  • Method claims: Claiming methods of use offers strategic coverage, especially in therapeutic contexts.
  • Formulation claims: Covering specific formulations can prevent generic or biosimilar development in combination with active compounds.

Potential claim challenges include prior art that discloses similar compounds, analogous methods, or comparable formulations, which could threaten the patent’s validity or enforceability. To withstand validity challenges, the patent must demonstrate novelty and inventive step (non-obviousness), especially given the high patentability bar in chemical and pharmaceutical areas.


Patent Landscape and Competitive Environment

Prior Art and Related Patents

The patent landscape for pharmaceuticals is densely populated with patents covering:

  • Chemical classes: If the '694 patent claims a novel chemical class, prior art searches focus on related compounds disclosed in patents or scientific literature.
  • Therapeutic applications: Patents may overlap if similar uses or mechanisms have been patented previously, requiring careful analysis of the inventive step.
  • Synthesis methods: Overlapping synthetic routes could present obstacles or opportunities, depending on patent claim scope.

Competitor Patents and Patent Thickets

The landscape is likely punctuated by multiple patents covering related compounds, formulations, or methods, forming a “patent thicket” that complicates commercialization and generic entry. The '694 patent's strength depends on its novelty over this thicket.

Patent Term and Life Cycle

Given its issue date, the '694 patent will expire approximately 20 years from its earliest filing date, typically around 2039, assuming standard patent term extensions. Its strength diminishes as expiration approaches, especially if generic competition emerges earlier through patent challenges or licensing.

Legal Challenges and Freedom-to-Operate

Competitors may challenge the patent’s validity through inter partes reviews or patent litigation, especially if prior art is found. Conversely, the patent holder could seek licensing deals or strategic alliances with other entities developing similar treatments.


Implications for Industry and Investment

The scope and robustness of the '694 patent influence:

  • Market exclusivity
  • Pricing power
  • Development of follow-on therapies or biosimilars
  • Valuation of the patent portfolio

Strong, well-drafted claims that withstand legal challenges facilitate sustained market control and investments, while overly broad claims susceptible to invalidation threaten long-term exclusivity.


Key Takeaways

  • The '694 patent's scope hinges on the breadth of chemical and method claims, impacting its enforceability and commercial utility.
  • Broad chemical and method claims provide stronger market protection, but must be balanced against prior art to ensure validity.
  • The patent landscape surrounding the invention is presumably crowded, emphasizing the necessity for strategic claim drafting and continuous monitoring.
  • Legal resilience depends on thorough patent prosecution, clear claim definitions, and defensive strategies against patent validity challenges.
  • Stakeholders should analyze claim scope thoroughly to develop licensing, partnership, or litigation strategies effectively.

FAQs

1. What are the main advantages of broad patent claims in pharmaceuticals?
Broad claims extend market exclusivity, reduce competition, and prevent competitors from designing around the patent. However, they must be supported by robust inventive steps and avoid overlap with prior art.

2. How does claim scope influence patent enforcement?
Narrow claims may be easier to enforce but limit protection, while broad claims can deter competition but are more vulnerable to invalidation if overreach is challenged.

3. Can the '694 patent be challenged after issuance?
Yes, through post-grant proceedings like inter partes review, challenges can be mounted to question novelty and non-obviousness, potentially weakening or invalidating the patent.

4. What role does the patent landscape play in drug development?
A crowded patent environment can restrict freedom-to-operate, increase litigation risk, and influence R&D strategies. Understanding this landscape helps in designing around existing patents or identifying licensing opportunities.

5. How can patent claims be strategically drafted to maximize protection?
Claims should balance breadth and specificity, align with the invention’s inventive step, and anticipate possible design-arounds to secure comprehensive coverage.


References

  1. [Legal analysis based on USPTO public records and patent claims].
  2. [General practices in pharmaceutical patenting, e.g., WIPO, 2021].

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Drugs Protected by US Patent 10,709,694

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 10,709,694 ⤷  Get Started Free REDUCTION IN A SUBJECT'S RISK OF EXPERIENCING A BREAKTHROUGH OVERT HEPATIC ENCEPHALOPATHY (HE) EPISODE ⤷  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

International Family Members for US Patent 10,709,694

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2009298389 ⤷  Get Started Free
Australia 2010260089 ⤷  Get Started Free
Australia 2010271070 ⤷  Get Started Free
Brazil PI0920465 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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