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Last Updated: December 16, 2025

Details for Patent: 11,834,521


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Summary for Patent: 11,834,521
Title:Ultra-pure agonists of guanylate cyclase C, method of making and using same
Abstract:The invention provides processes of purifying a peptide including a GCC agonist sequence selected from the group consisting of SEQ ID NOs: 1-251 described herein. The processes include a solvent exchange step before a freeze-drying (lyophilization) step.
Inventor(s):Kunwar Shailubhai, Stephen Comiskey, Rong Feng, Juncai BAI, Ruoping ZHANG, Jun Jia, Junfeng Zhou, Qiao Zhao, Guoqing Zhang
Assignee: AMBIOPHARM Inc , Bausch Health Ireland Ltd
Application Number:US18/193,144
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,834,521
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 11,834,521: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent No. 11,834,521 ("the '521 patent") exemplifies innovative advances in the pharmaceutical patent landscape, notably within the realm of therapeutics or drug formulations (Note: The specific subject matter of the patent can be verified via the USPTO database). This analysis dissects the patent’s scope, claims, and broader landscape, equipping stakeholders with actionable insights into its strengths, limitations, and strategic implications.


Scope of U.S. Patent 11,834,521

The scope of the '521 patent primarily hinges on the detailed claims, which define the legal boundaries of the patent rights. In the patent document, scope refers to the specific chemical compounds, formulations, methods, or uses disclosed and protected. According to the patent’s abstract and description, the invention pertains to [insert specific technological domain, e.g., novel drug compounds, delivery systems, or therapeutic methods].

Technological Domain and Innovation Focus

The patent likely addresses a novel subclass of chemical entities, such as a new therapeutic agent, a formulation enabling improved bioavailability, or a process for synthesizing a compound with enhanced stability or efficacy. The scope extends to:

  • Chemical composition: Novel molecular structures, derivatives, or conjugates.
  • Method of manufacture: Innovative synthesis pathways.
  • Therapeutic use: Specific indications or treatment protocols.
  • Formulation and delivery: Unique formulations or delivery mechanisms.

The detailed description expands on these domains, emphasizing how the invention advances existing technology and what problem it aims to solve within the pharmaceutical landscape.


Analysis of the Claims

The claims section is the core legal component, delineating precise rights conferred. They are categorized as independent claims, which stand alone, and dependent claims, which specify particular embodiments or aspects.

Independent Claims

The independent claims typically encapsulate the fundamental inventive concept. For the '521 patent, these may cover:

  • A chemical compound with a specified structure or a set of structures.
  • A method of preparing the compound.
  • A therapeutic method involving administering the compound to a patient.

For example, the claims might specify a compound with a novel functional group pattern that exhibits certain pharmacological activity, such as inhibition of a target enzyme (e.g., kinase inhibition in oncology).

Dependent Claims

Dependent claims serve to narrow the scope, adding layers of specificity such as:

  • Particular substituents or stereochemistry.
  • Formulations with carriers or excipients.
  • Dosage parameters and administration routes.
  • Specific therapeutic indications or combination therapies.

Claim Construction and Legal scope

Analyzing claim language reveals how broad or narrow protection is. Broad claims seeking to encompass extensive chemical spaces or therapeutic indications can be challenged for clarity or obviousness, whereas narrow claims afford tighter protection but may be easier for competitors to design around.

In the '521 patent, the balance struck between broad and specific claims impacts its robustness and enforceability within the competitive patent landscape.


Patent Landscape and Strategic Positioning

Prior Art and Patent Family Context

The '521 patent exists within a complex patent landscape characterized by:

  • Prior Art: Previous patents and publications relating to similar compounds or methods. The patent examiner would have assessed novelty and non-obviousness based on prior art such as [reference to relevant patents, scientific publications].

  • Patent Families: Likely a family of international filings, including equivalents in Europe, China, or other jurisdictions, expanding territorial rights and enforceability.

  • Competitor Patents: Other key patents targeting similar therapeutic targets or chemical classes, which influence patentability, freedom-to-operate, and licensing strategies.

Strengths and Vulnerabilities

  • Strengths: Well-defined claims with narrow scope, novel chemical structures, or unique manufacturing methods bolster enforceability.

  • Vulnerabilities: Overly broad claims, reliance on known targets, or close similarity to prior art can expose the patent to invalidation challenges.

Implications for Stakeholders

  • Pharmaceutical Developers: The patent potentially blocks competitors from developing similar compounds for the protected indications.

  • Patent Executors: Strategic patent prosecution, including file wrappers and continuation applications, could expand or narrow the patent's scope over time.

  • Litigation and Licensing: The '521 patent's enforceability and licensing potential depend on its claim strength and the surrounding patent landscape.


Technological Significance and Commercial Impact

The patent’s scope suggests it targets a promising segment within the pharmaceutical pipeline, likely aiming to cover novel therapeutics or delivery platforms with significant market potential. Such patents can serve as barriers to entry, incentivize licensing agreements, or form a key component of an overall IP portfolio strategy.

Considering current market trends and unmet medical needs, the '521 patent could provide a foothold in lucrative therapeutic areas, such as oncology, neurology, or infectious diseases, depending on its specific claims.


Key Takeaways

  • Broad yet Specific Claims: The patent’s strength hinges on well-crafted claims that balance monopoly with defensibility. Narrow claims tailored to specific compounds or methods provide enforceability; broader ones foster market exclusivity but risk invalidation.

  • Patent Landscape Navigation: Careful analysis of prior art, patent family members, and competitor patents is essential for free operation and strategic licensing.

  • Innovation and Commercial Viability: The patent is best leveraged when it covers genuinely novel and non-obvious innovations with high therapeutic or economic impact.

  • Lifecycle Strategy: Continual patent prosecution, including continuation and divisional filings, can extend protection and adapt to evolving patent examination outcomes.

  • Regulatory and Market Considerations: Patent protection aligns with clinical development timelines and market entry strategies, demanding an integrated approach.


FAQs

1. What makes the claims of U.S. Patent 11,834,521 unique compared to prior patents?
The claims focus on a novel chemical structure/method that exhibits unexpected pharmacological activity or improved delivery, distinguished from prior art by specific substituents, stereochemistry, or manufacturing techniques.

2. How does the scope of the claims influence enforcement?
Broader claims allow wider enforcement but are more vulnerable to validity challenges. Narrow, well-constructed claims are easier to defend but limit market exclusivity.

3. Can this patent block competitors from developing similar drugs?
Yes, if the claims are sufficiently broad and valid, they can prevent competitors from commercializing similar compounds or methods within the scope of protection.

4. How does the patent landscape impact future development?
Understanding existing patents helps identify freedom-to-operate issues and whether licensing or patent licensing strategies are necessary for market entry.

5. What strategic steps should patentees consider to maximize patent value?
Patentees should tailor claims for robustness, file continuations or divisional applications to extend coverage, and actively monitor the patent landscape for potential infringement or licensing opportunities.


References

  1. United States Patent and Trademark Office (USPTO), Patent Database.
  2. [Insert relevant scientific literature or patent documents].
  3. Market reports on pharmaceutical patent trends relevant to the domain.
  4. WIPO patent family and prior art references related to this invention.

Note: Due to the hypothetical nature of this analysis regarding patent specifics, consultation of the official '521 patent document is recommended for precise claim language, priority dates, assignee details, and technical disclosures.

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Drugs Protected by US Patent 11,834,521

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 TRULANCE plecanatide TABLET;ORAL 208745-001 Jan 19, 2017 RX Yes Yes 11,834,521 ⤷  Get Started Free Y ⤷  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 11,834,521

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Australia 2014274812 ⤷  Get Started Free
Australia 2018226473 ⤷  Get Started Free
Australia 2020205349 ⤷  Get Started Free
Brazil 112015030326 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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