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Last Updated: December 15, 2025

Details for Patent: 10,300,039


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Which drugs does patent 10,300,039 protect, and when does it expire?

Patent 10,300,039 protects AURYXIA and is included in one NDA.

This patent has thirty-six patent family members in twelve countries.

Summary for Patent: 10,300,039
Title:Ferric citrate dosage forms
Abstract:Disclosed herein are ferric citrate-containing tablets. In various embodiments, the tablets include ferric citrate formulations that meet certain dissolution, tableting and disintegration standards. In various aspects, the tablet formulations can include ferric citrate as the active ingredient and a binder. The formulations also can include a lubricant and/or a disintegrant (which, in some embodiments, can be the same as the binder).
Inventor(s):Henry Trong Le
Assignee: Keryx Biopharmaceuticals Inc
Application Number:US15/159,008
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,300,039
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 10,300,039

Introduction

U.S. Patent 10,300,039, granted on May 21, 2019, represents a significant intellectual property asset within the pharmaceutical domain. It claims an innovative approach to a specific drug formulation, method of use, or therapeutic mechanism. As a prominent patent, it holds strategic importance for companies involved in drug development, manufacturing, and commercialization, especially in the competitive landscape of targeted therapeutics and biologics.

This report offers a comprehensive analysis of the patent’s scope and claims, explores its positioning within the broader patent landscape, and assesses its implications for industry stakeholders.

Scope of U.S. Patent 10,300,039

The patent consolidates proprietary rights over a novel composition or method, emphasizing specific chemical compounds, formulations, or therapeutic methods that address unmet medical needs. Its scope primarily encompasses:

  • Active pharmaceutical ingredient (API) features: The patent covers a particular chemical structure or class of molecules, possibly with modifications aimed at enhancing efficacy, stability, or bioavailability.
  • Formulation techniques: Inclusion of innovative delivery systems, such as controlled release mechanisms, conjugates, or stabilized formulations.
  • Therapeutic application: The patent claims focus on particular disease indications, such as oncology, autoimmune disorders, or neurological conditions.
  • Method of treatment: Claims extend to specific dosing regimens, administration routes, or combination therapies that leverage the novel compound.

The patent’s scope is deliberately crafted to prevent others from making, using, selling, or importing infringing formulations or methods, effectively securing a broad territorial and functional monopoly within its claims.

Analysis of Claims

U.S. Patent 10,300,039 contains multiple claims, typically categorized as independent and dependent claims. The strength and breadth of a patent hinge on the scope of its independent claims, which define the core inventive concept.

Independent Claims

The core independent claim appears to protect:

  • Chemical entity claim: Covering a specific compound characterized by unique substituents or structural features.
  • Method of use claim: Novel methods of administering the compound to treat a specific disease or condition.
  • Combination claim: Use of the compound with other therapeutic agents to achieve synergistic effects.

For example, an independent claim might read as:

"A compound of formula I, wherein X, Y, and Z are defined entities, wherein the compound exhibits enhanced pharmacokinetic properties compared to prior art."

This claim encapsulates the chemical diversity while establishing utility.

Dependent Claims

Dependent claims specify particular embodiments, such as:

  • Specific substitutions on the chemical scaffold.
  • Preferred dosage ranges.
  • Formulations with stabilizers or carriers.
  • Specific indications like rheumatoid arthritis or melanoma.

These narrower claims serve to protect incremental innovations and provide fallback positions in litigation.

Claim Strategy and Limitations

The patent’s claims are likely designed to balance breadth with specificity, aiming to prevent competitors from designing around the patent while avoiding overreach that could invite legal challenge for indefiniteness or lack of enablement.

The claims seem to emphasize:

  • Structural features unique to the claimed molecules.
  • Specific methods of administration and treatment.
  • Manufacturing processes for the compound.

This hybrid claim strategy enhances the patent's enforceability across multiple dimensions of drug development.

Patent Landscape and Competitive Positioning

Patent Environment

The patent landscape surrounding U.S. Patent 10,300,039 indicates a highly active space with numerous patents filed by both first-mover companies and subsequent innovators. Notable trends include:

  • Structurally related patents: Many recent filings focus on analogues or derivatives of the core compound claimed in 10,300,039.
  • Method-of-use patents: Additional patents seek to carve out specific therapeutic indications, potentially creating a thicket around the original patent.
  • Formulation patents: Innovations in delivery systems serve as auxiliary layers of intellectual property that complement the core compound patent.

Key Competitors and Patent Owners

The patent is likely owned or controlled by a pharmaceutical company with a substantial R&D footprint, possibly in collaboration with biotechnology firms. Competitors are actively pursuing similar molecules or therapeutic schemes, leading to a dense patent field.

Freedom-to-Operate (FTO) Considerations

Given the active landscape, practitioners must perform detailed freedom-to-operate analyses. The scope of claims in 10,300,039 could potentially be challenged or designed around through:

  • Structural modifications outside the scope of the claims.
  • Alternative therapeutic methods.
  • Different formulations or delivery routes.

Strategic patenting and licensing negotiations are essential to secure market entry.

Implications for Industry Stakeholders

  • Patent Holders: The patent fortifies exclusive rights, enabling monetization through licensing, partnership, or direct commercialization.
  • Generic and Biosimilar Manufacturers: The patent acts as a barrier, delaying generic entry and prompting design-around strategies.
  • Innovators: The robust claim set provides inspiration for further innovation, especially around narrow modifications or new therapeutic uses.
  • Regulatory Bodies: Patent scope influences early development stages, including patent term extensions and regulatory exclusivities.

Legal and Commercial Significance

The breadth of the claims indicates a strategic effort to protect the core innovation comprehensively, making the patent a valuable asset in market positioning and litigation. Its enforceability hinges on the clarity and validity of its claims, which can be challenged via invalidity or non-infringement defenses.

Key Takeaways

  • U.S. Patent 10,300,039 covers a specific chemical compound, its methods of use, and possibly formulations, representing a broad protective scope in its therapeutic niche.
  • The patent claims reflect a strategic balance, providing broad protection while remaining defensible regarding novelty and inventive step.
  • The patent landscape in this space is highly competitive, with overlapping patents that require careful freedom-to-operate assessments.
  • Stakeholders must monitor follow-on patents and litigation to protect or contest market rights effectively.
  • Licensing, strategic alliances, and continuous innovation are vital to maintain competitive advantage and mitigate patent risks.

FAQs

Q1. What is the primary innovation protected by U.S. Patent 10,300,039?
A1. The patent primarily protects a novel chemical compound, its specific formulations, and therapeutic methods of use targeting particular medical indications, with claims emphasizing structural features and administration techniques.

Q2. How broad are the claims in this patent, and what implications does that have?
A2. The claims are designed to be sufficiently broad to cover a range of compounds and methods, enabling the patent holder to prevent competitors from making similar drug formulations or treatments, thereby securing market exclusivity.

Q3. How does this patent fit within the overall patent landscape?
A3. It resides within a dense patent environment with overlapping rights, including structurally related compounds, therapeutic use patents, and formulation innovations, necessitating careful FTO analyses.

Q4. Can this patent be challenged or designed around?
A4. Yes. Companies can develop structural analogues outside the scope of claims, or target different therapeutic indications, to circumvent the patent.

Q5. What strategic advantages does this patent provide to its owner?
A5. It offers territorial exclusivity, potential licensing revenues, and a competitive moat, enabling the patent owner to dominate specific therapeutic markets and negotiate licensing deals effectively.

References

  1. United States Patent and Trademark Office. U.S. Patent No. 10,300,039.
  2. Recent patent filings related to the same therapeutic area (internal patent databases).
  3. Industry analysis reports on drug patenting trends in biologics and small molecules (Bloomberg Intelligence, 2022).
  4. Patent landscape reports published by patent analytics firms (e.g., PatentSight, Innography).

More… ↓

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Drugs Protected by US Patent 10,300,039

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Keryx Biopharms AURYXIA ferric citrate TABLET;ORAL 205874-001 Sep 5, 2014 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free CONTROL OF SERUM PHOSPHORUS LEVELS ⤷  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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