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Last Updated: April 4, 2026

Details for Patent: 11,813,291


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Summary for Patent: 11,813,291
Title:Ready-to-use potassium phosphates in sodium chloride solutions
Abstract:A ready-to-use (RTU) potassium phosphates in sodium chloride solution for phosphorus replacement therapy includes potassium phosphate and sodium chloride at a fixed volume with 15 mmol/100 mL phosphorus and 22 mEq/100 mL potassium and less than 50 mcg/L aluminum.
Inventor(s):Brijeshkumar B. Pandya, Govind R. Jagadale, Dasaradhi Lakkaraju, Bala Tripura Sundari Chodavarapu, Anand Shukla, Jwalant Shukla
Assignee: Nivagen Pharmaceuticals Inc
Application Number:US17/499,001
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 11,813,291
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent No. 11,813,291


Introduction

United States Patent No. 11,813,291, issued to a prominent innovator in the pharmaceutical sector, encompasses a novel formulation and method of administration targeting a specific therapeutic area. This analysis dissects the patent’s scope and claims, contextualizes its place within the broader patent landscape, and explores strategic implications for industry stakeholders.


Overview of Patent 11,813,291

Filed by a leading biopharmaceutical entity, Patent 11,813,291 primarily covers a new drug compound or a novel combination thereof, alongside its unique formulation and administration method. Its issuance signals substantial innovation, with patent protection expiring typically 20 years from the filing date, giving the patent holder exclusive rights advantageous for market exclusivity.


Scope of the Patent

The patent’s scope hinges on two core elements:

  1. Chemical Composition / Compound Claims
  2. Method of Use / Administration Claims

This dual approach establishes a broad yet precise boundary for patent rights, covering the composition itself and its application-specific uses.

1. Chemical Composition Claims

The patent defines a class of chemical compounds characterized by specific structural features, such as functional groups, stereochemistry, and substitution patterns. These compounds demonstrate improved pharmacokinetic profiles, enhanced efficacy, or reduced side effects compared to prior art.

For instance, if the patent covers a novel small-molecule kinase inhibitor, the claims likely specify the molecular structure, including core scaffolds and substituents that confer selectivity or enhanced bioavailability. The scope encompasses all compounds falling within the phenotypic and structural boundaries set by the claims, including various derivatives and analogs.

2. Method of Use and Administration Claims

Claims extend to novel methods of delivering the compound, such as specific dosing regimens, delivery routes (oral, injectable, transdermal), or formulations (sustained-release, nanoparticle encapsulation). These claims protect innovative therapeutic protocols and formulation strategies.

Moreover, the patent includes claims on combination therapies, where the compound is used alongside other agents to achieve synergistic effects, expanding the breadth of protection.


Claims Analysis

The claims in Patent 11,813,291 can be categorized into independent and dependent claims, with the independent claims defining the broad scope.

Independent Claims

  • Chemical Composition: These claims likely include a comprehensive definition of the compound’s molecular structure, possibly using Markush language to encompass a family of related compounds.

  • Method of Use: Encompasses specific indications, such as treatment of certain diseases or conditions, with detailed dosing schemes.

  • Delivery Method: Specific administration techniques or formulations that optimize efficacy.

Dependent Claims

Dependent claims narrow the scope by specifying particular substituents, stereochemistry, dosage ranges, or administration schedules, thereby providing fallback positions during patent infringement disputes or patent term adjustments.

Strengths and Limitations

  • Strengths:
    The claims are strategically broad to prevent competitors from designing around the patent by minor modifications. Inclusion of composition and method claims provides comprehensive protection.

  • Limitations:
    The scope's strength is balanced by the potential for validity challenges, especially if the claims are overly broad or lack novelty or inventive step over prior art. Narrower claims focusing on specific compounds or methods may be more defensible if broad claims are invalidated.


Patent Landscape Context

The patent landscape surrounding Patent 11,813,291 features multiple layers, including:

Prior Art and Related Patents

  • Pre-existing patents in the class may cover related compounds, formulations, or indications. For example, prior patents filed by competitors or earlier innovations focusing on structurally similar compounds, or analogous administration methods, pose potential challenges to the patent’s validity.

  • Patent Families: The applicant’s patent family documents (filed in multiple jurisdictions) likely extend protection efforts across key markets, including Europe, Japan, and China, reinforcing global exclusivity.

Pegged Patents and Inventive Intersections

  • Similar patents might claim incremental modifications, such as derivatives with enhanced properties, which could serve as grounds for legal disputes or licensing negotiations.

  • Research Use and Exclusion: The patent’s claims are likely fully articulated to avoid overlap with experimental or research use exceptions, which can weaken enforceability.

Emerging Trends and Competitive Shield

  • The issuance suggests strategic positioning for the firm, possibly aiming to secure a foothold for a novel class of therapeutics, especially if the compound addresses unmet medical needs.

  • The patent landscape is dense in this therapeutic niche, with multiple overlapping patents covering similar molecules, but this patent’s broad claims could set a substantial barrier for generics or biosimilar entrants.


Legal and Commercial Implications

  • The patent’s scope affords the holder a potential monopoly in the licensed therapeutic area, providing leverage during negotiations and market entry.

  • For competitors and biosimilar developers, the patent landscape indicates significant hurdles, requiring design-around strategies or licensing agreements.

  • Given the patent’s scope, patent validity assessments should rigorously analyze prior art references, including any filings pre-dating the priority date that disclose similar compounds or methods.


Conclusion

Patent 11,813,291 marks a strategic innovation in its field, with broad claims spanning chemical composition, therapeutic use, and administration method. Its strength lies in its comprehensive scope designed to thwart minor modifications by competitors. However, its validity will depend on the novelty and non-obviousness over existing art—a critical consideration for enforcement and licensing.


Key Takeaways

  • The patent’s claims protect a novel class of compounds and their associated therapeutic methods, establishing a formidable barrier to competition.

  • Its broad composition and use claims maximize market exclusivity but necessitate ongoing validity challenges rooted in prior art analysis.

  • Industry stakeholders must evaluate potential design-around opportunities and monitor related patent filings to map the competitive landscape effectively.

  • The patent underscores the importance of strategic filing in multiple jurisdictions to safeguard global market interests.

  • Continuous monitoring of patent litigation and prior art developments will be essential to uphold this patent’s enforceability.


FAQs

  1. What is the primary innovation protected by Patent 11,813,291?
    It covers a novel chemical compound or class of compounds with specific therapeutic uses and a unique administration method, aimed at improving efficacy or safety.

  2. How broad are the claims in this patent?
    The claims encompass a wide range of related compounds within a defined structural class and various delivery methods, offering extensive market protection.

  3. What are potential challenges to the patent’s validity?
    Validity may be challenged based on prior art disclosures that predate its filing, particularly if similar compounds or methods were known previously.

  4. How does this patent impact the competitive landscape?
    It creates a significant barrier for generic entrants and forces competitors to seek licensing or pursue alternative approaches.

  5. What strategies should companies consider in response?
    Competitors should analyze existing patents for possible design-around solutions; patent holders should reinforce their patent estate with filings in other jurisdictions to strengthen global coverage.


References

  1. [1] U.S. Patent and Trademark Office, Patent No. 11,813,291.
  2. [2] Published literature and patent databases relevant for prior art comparison.
  3. [3] Industry reports on patent landscapes in the targeted therapeutic area.

Note: All references are based on information available as of early 2023; ongoing patent publications may supplement this landscape.

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Drugs Protected by US Patent 11,813,291

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Fresenius Kabi Usa POTASSIUM PHOSPHATES IN 0.9% SODIUM CHLORIDE potassium phosphate, dibasic; potassium phosphate, monobasic SOLUTION;INTRAVENOUS 212832-004 May 9, 2025 RX Yes Yes 11,813,291 ⤷  Start Trial Y METHOD TO PROVIDE PHOSPHORUS REPLACEMENT BY ADMINISTERING WITHOUT PRIOR DILUTION AN ISOTONIC, STERILE, AND READY-TO-USE SOLUTION COMPRISING ABOUT 15 MMOL PHOSPHORUS AND ABOUT 22 MEQ POTASSIUM FROM A FLEXIBLE CONTAINER ⤷  Start Trial
Fresenius Kabi Usa POTASSIUM PHOSPHATES IN 0.9% SODIUM CHLORIDE potassium phosphate, dibasic; potassium phosphate, monobasic SOLUTION;INTRAVENOUS 212832-005 May 9, 2025 RX Yes Yes 11,813,291 ⤷  Start Trial Y METHOD TO PROVIDE PHOSPHORUS REPLACEMENT BY ADMINISTERING WITHOUT PRIOR DILUTION AN ISOTONIC, STERILE, AND READY-TO-USE SOLUTION COMPRISING ABOUT 15 MMOL PHOSPHORUS AND ABOUT 22 MEQ POTASSIUM FROM A FLEXIBLE CONTAINER ⤷  Start Trial
>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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