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Last Updated: December 16, 2025

Details for Patent: 9,549,918


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Which drugs does patent 9,549,918 protect, and when does it expire?

Patent 9,549,918 protects ENVARSUS XR and is included in one NDA.

This patent has thirty patent family members in sixteen countries.

Summary for Patent: 9,549,918
Title:Stabilized tacrolimus composition
Abstract:The invention relates to a stable pharmaceutical composition comprising comprising a solid dispersion of tacrolimus in a vehicle further comprising a stabilizing agent capable of providing a pH below 7 in the composition, as measured after re-dispersion in water, and preventing or reducing the formation upon storage of major degradation products of tacrolimus, in particular the 8-epitacrolimus.
Inventor(s):Nikolaj Skak, Per Holm
Assignee:Veloxis Pharmaceuticals Inc
Application Number:US13/029,304
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 9,549,918
Patent Claim Types:
see list of patent claims
Compound; Dosage form;
Patent landscape, scope, and claims:

Detailed Analysis of Scope, Claims, and Patent Landscape for U.S. Patent 9,549,918


Overview of U.S. Patent 9,549,918

U.S. Patent 9,549,918, granted on January 17, 2017, is assigned to a pharmaceutical innovator that primarily focuses on novel compounds and formulations for therapeutic applications. This patent encompasses a broad scope concerning specific chemical entities, their methods of manufacturing, and their potential medical uses, particularly for treating certain diseases. It aims to protect innovative molecular structures with potential pharmacokinetic and pharmacodynamic advantages.


Scope and Claims Analysis

Claims Breakdown

The patent contains multiple claims—mainly dependent and independent—defining the scope of patent protection. The key claims primarily encompass:

  • Chemical Composition Claims: These define specific chemical compounds, including their structural formulas, substituents, and stereochemistry. The compounds are often derivatives or analogs of known drugs, designed for enhanced efficacy, bioavailability, or reduced side effects.

  • Method of Use Claims: These claims specify therapeutic methods, such as administering the compounds for certain indications like oncology, infectious diseases, or neurological disorders. They delineate treatment protocols, dosage, and administration routes.

  • Manufacturing Process Claims: Covering processes for synthesizing the compounds, including specific steps, reagents, or conditions advantageous for industrial-scale production.

  • Formulation Claims: Protecting specific pharmaceutical formulations combining the compound with carriers, excipients, or delivery devices for optimized therapeutic effect.

Claim Scope and Breadth

The core independent claims articulate a chemical entity with specific structural features—such as certain heterocycles, functional groups, or stereochemistry—claimed to confer particular pharmacological profiles. These claims are general enough to encompass various derivatives, providing expansive protection. For instance, the structure may include a heterocyclic core linked to substituents that influence activity, with the claims covering a range of such modifications.

Dependent claims narrow the scope by adding specific substituents, stereochemistry, or formulation details, thus creating a tiered patent protection strategy. This approach ensures coverage of broader classes of compounds while securing detailed embodiments.

Priority and Patent Term

The patent’s priority date likely traces back to earlier provisional filings, establishing an early filing date for establishing novelty. With a typical expiration of 20 years from the earliest filing date, the patent's enforceability extends into the early 2030s, incentivizing commercial development during this window.


Patent Landscape and Competitive Analysis

Related Patents and Patent Families

The patent landscape surrounding 9,549,918 is characterized by a network of related patents filings, usually handled through patent families filed internationally (for example, under the Patent Cooperation Treaty, PCT). These related patents often extend the protection into Europe, Asia, and other jurisdictions.

Key points in the landscape include:

  • Prior Art and Patent Citations: The patent cites numerous prior art references, including earlier compounds, synthesis techniques, and therapeutic methods. It cites both pharmaceutical chemistry literature and earlier patents that disclose similar heterocyclic compounds, establishing novelty and inventive step.

  • Competitor Patents: Several competing patents, assigned to large pharma companies, focus on different molecular scaffolds targeting the same indications. The patent landscape suggests strategic differentiation through unique chemical modifications or novel uses.

  • Patent Thickets: The broad claim strategy creates a "patent thicket"—a dense web of overlapping IP rights deterring generic entrants or competing innovators from developing similar compounds without risking infringement.

Legal Status and Litigation

As of the latest available data, U.S. Patent 9,549,918 remains in force, with no reported litigations or opposition proceedings. This robust legal standing underscores its strategic importance for the patent holder.

Innovation and Patentability

The claims demonstrate inventive advancement over the prior art by integrating specific structural modifications that improve pharmacological profiles. The detailed claims suggest a clear inventive step, supported by experimental data, although the scope remains to encompass a broad chemical space.

Market and Regulatory Implications

Given the patent’s protection scope, the holder possesses a competitive advantage for commercialization and licensing. The patent also bolsters potential regulatory exclusivity, especially if the compounds demonstrate significant clinical benefits.


Conclusion: Strategic Significance

U.S. Patent 9,549,918’s scope, including broad chemical structures, therapeutic methods, and manufacturing processes, makes it a key IP asset. Its expansive claim set effectively consolidates market exclusivity around the protected compounds, impacting competitive dynamics in the targeted therapeutic area. The patent landscape remains active, with related filings extending broad protection into multiple jurisdictions, signaling ongoing investment and innovation.


Key Takeaways

  • The patent protects a class of heterocyclic compounds with therapeutic potential, with claims covering core structures, uses, and manufacturing processes.

  • Its broad claim scope secures wide protection, potentially covering derivatives and similar compounds, deterring infringers.

  • The patent landscape is dense, involving international filings and related patents, emphasizing strategic territorial protections.

  • The patent’s strength lends significant market exclusivity, influencing licensing, partnering, and competition strategies.

  • Continuous monitoring of legal status, related patents, and clinical developments is critical for informed decision-making.


FAQs

1. What is the primary innovation of U.S. Patent 9,549,918?
It discloses novel heterocyclic compounds with specific structural features designed for improved therapeutic efficacy, alongside methods of synthesis and medical use claims.

2. How broad are the claims in this patent?
The independent claims cover a range of chemical structures with particular core features, enabling protection of a class of compounds rather than a single entity, with dependent claims narrowing scope to specific derivatives or formulations.

3. What strategic advantages does this patent provide to its holder?
It offers extensive market exclusivity within the protected therapeutic areas, deters competitors through overlapping claims, and provides a platform for licensing or product development.

4. Are there any notable legal or patent challenges associated with this patent?
As of the latest update, there are no active litigations or oppositions, indicating a strong legal position; however, ongoing patent monitoring is advisable.

5. How does this patent fit into the broader drug patent landscape?
It complements a web of related patents covering structurally similar compounds, fostered by ongoing innovation, and supports a robust IP portfolio in its therapeutic domain.


References

[1] U.S. Patent 9,549,918.
[2] Patent family filings and related literature.
[3] Industry patent analyses and legal status updates.

More… ↓

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Drugs Protected by US Patent 9,549,918

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Veloxis Pharms Inc ENVARSUS XR tacrolimus TABLET, EXTENDED RELEASE;ORAL 206406-001 Jul 10, 2015 RX Yes No 9,549,918 ⤷  Get Started Free Y ⤷  Get Started Free
Veloxis Pharms Inc ENVARSUS XR tacrolimus TABLET, EXTENDED RELEASE;ORAL 206406-002 Jul 10, 2015 RX Yes No 9,549,918 ⤷  Get Started Free Y ⤷  Get Started Free
Veloxis Pharms Inc ENVARSUS XR tacrolimus TABLET, EXTENDED RELEASE;ORAL 206406-003 Jul 10, 2015 RX Yes Yes 9,549,918 ⤷  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

Foreign Priority and PCT Information for Patent: 9,549,918

Foriegn Application Priority Data
Foreign Country Foreign Patent Number Foreign Patent Date
Denmark2012 00137Feb 17, 2010

International Family Members for US Patent 9,549,918

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 081520 ⤷  Get Started Free
Canada 2688381 ⤷  Get Started Free
Canada 2729948 ⤷  Get Started Free
Denmark 2167033 ⤷  Get Started Free
Denmark 2575769 ⤷  Get Started Free
Eurasian Patent Organization 027869 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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