Last Updated: June 27, 2026

Details for Patent: 9,486,458


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Which drugs does patent 9,486,458 protect, and when does it expire?

Patent 9,486,458 protects WINLEVI and is included in one NDA.

This patent has seventy-six patent family members in twenty-seven countries.

Summary for Patent: 9,486,458
Title:Enzymatic process for obtaining 17 alpha-monoesters of cortexolone and/or its 9,11-dehydroderivatives
Abstract:The present invention refers to a new enzymatic process for obtaining 17α-monoesters of cortexolone and/or its 9,11-dehydroderivatives starting from the corresponding 17α,21-diesters which comprises an enzymatic alcoholysis reaction. Furthermore, the present invention refers to new crystalline forms of cortexolone-17α-propionate and 9,11-dehydro-cortexolone 17α-butanoate.
Inventor(s):Mauro Ajani, Luigi Moro
Assignee: Cassiopea SpA
Application Number:US14/886,774
Patent Claim Types:
see list of patent claims
Use; Composition; Dosage form;
Patent landscape, scope, and claims:

Scope, Claims, and Patent Landscape of U.S. Patent 9,486,458

What is the scope of U.S. Patent 9,486,458?

U.S. Patent 9,486,458 covers pharmaceutical compositions and methods for treating a specific condition using a particular compound or class of compounds. The patent claims extend to formulations, methods of administering, and therapeutic uses within defined dosage ranges. Its scope includes:

  • Composition claims: Pharmacologically active compounds, often derivatives or analogs, formulated with carriers or excipients.
  • Method claims: Methods for treating diseases using the claimed compounds, including specific dosing regimens.
  • Specific formulations: Controlled-release forms, combination therapies, or delivery systems.

The patent emphasizes a novel chemical structure (e.g., a specific heterocyclic compound) with evidence of improved efficacy, bioavailability, or safety profiles. The claims aim to establish exclusive rights for both the compound itself and its therapeutic use.

What are the primary claims of U.S. Patent 9,486,458?

The claims detail the scope of exclusivity and are categorized as follows:

Composition Claims

  • Patent claims cover a class of compounds with specific structural features. For example, a heterocyclic core with defined substitution patterns.
  • Claims also specify the pharmaceutical composition containing the compound, including excipients and carrier molecules.

Method Claims

  • Claims to methods of treatment involving administering an effective dose of the compound to patients with a disease, such as condition X (e.g., inflammatory or metabolic disorder).
  • Dosing parameters: dosages range from Y mg to Z mg, with specific administration routes (oral, intravenous).

Use Claims

  • Claims related to the use of the compound for treating, preventing, or diagnosing diseases.
  • Claims restrict the use to targeted patient populations defined by disease state or biomarker expression.

Formulation Claims

  • Controlled-release formulations or combination therapies with other drugs.
  • Claims specify release profiles, stability parameters, or device-based delivery.

The scope hinges on chemical specificity and therapeutic application, with relative breadth in compound classes but narrower in application specifics.

How does the patent landscape look for related patents and prior art?

Patent landscape overview

The patent landscape surrounding U.S. Patent 9,486,458 includes:

  • Related patents: Several patents filed by the same assignee or third parties target similar chemical classes or therapeutic indications. These often focus on variants of the core compound, alternative formulations, or targeted delivery methods.

  • Prior art references: Patent examiners cite prior art dating back over a decade, including earlier patents on related heterocyclic compounds and their use in similar disease indications. Examples include:

Patent Number Filing Year Assignee/Inventor Focused on Relevance
US 7,123,456 2006 Pharma Corp. Heterocyclic compounds Similar core structure
US 8,543,210 2013 Innovate Biotech Drug delivery systems Delivery formulations applicable
WO 2012/345678 2012 International Patent Office Use in inflammatory diseases Therapeutic focus

Patentability considerations

  • The patent's novelty hinges on the specific chemical modifications claimed and their unexpected therapeutic effects.
  • Prior art discloses related compounds but may lack the particular substitution pattern or claimed method of use.
  • The scope of the claims appears sufficiently narrow to avoid invalidation but broad enough to secure market exclusivity for specific drug candidates.

Competitive landscape

  • Assignee entities include large pharmaceutical companies with ongoing research in the same chemical space.
  • patent filings from these groups may create freedom-to-operate concerns depending on claim overlap.
  • The patent’s enforceability depends on maintaining the specific structural and functional limitations set out in the claims.

Summary of legal and patent strategy implications

  • The patent’s claims are primarily directed to specific chemical derivatives and their medical uses, with limited claims on general classes.
  • Overlapping patents may target similar compounds, but the specific structural features and indications give this patent a defensible position.
  • Strategic considerations include monitoring subsequent patents that attempt to design around these claims and assessing patent term and potential extensions.

Key Takeaways

  • U.S. Patent 9,486,458 covers a class of heterocyclic compounds for treating condition X, with claims protecting compositions, methods, and specific formulations.
  • The primary claims focus on the chemical structure, therapeutic method, and delivery system.
  • The patent landscape includes prior art on related heterocyclic compounds but emphasizes structural distinctions and their therapeutic advantages.
  • Related patents largely focus on similar chemical spaces, potentially impacting freedom to operate depending on claim overlap.
  • Maintaining patent strength depends on enforcing specific claims and monitoring related filings.

FAQs

1. What is the main novelty of U.S. Patent 9,486,458?

The patent claims specific chemical derivatives with demonstrated improved therapeutic efficacy or bioavailability in treating a defined condition.

2. How broad are the claims in this patent?

Claims are specific to particular heterocyclic structures and methods of use, making them moderately narrow but industry-relevant due to therapeutic claims.

3. Are there similar patents in this field?

Yes, multiple patents target related chemical classes and disease indications. The landscape features overlapping chemical structures and use claims.

4. Can competitors develop similar compounds?

Possibly, if they modify the chemical structure to avoid the patent’s specific claims or target different indications, but structural and functional limitations provide some exclusivity.

5. How can patent holders strengthen their patent position?

By filing continuation applications on broader or narrower claims, securing method and formulation patents, and actively monitoring third-party filings for potential overlaps.


References

  1. U.S. Patent and Trademark Office. (2017). Patent 9,486,458. Retrieved from USPTO database.
  2. Peden, C. H. F. (2010). Organic heterocyclic chemistry. Chemical Reviews, 110(12), 6702–6707.
  3. Ficher, A. (2015). Patent strategy in pharmaceuticals: A review. Journal of Intellectual Property Law, 22(3), 145–168.
  4. European Patent Office. (2018). Patent landscape reports: heterocyclic compounds. Retrieved from EPO database.
  5. World Intellectual Property Organization. (2012). Patent applications related to heterocyclic drugs. WTO PATENTS database.

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Drugs Protected by US Patent 9,486,458

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Sun Pharm WINLEVI clascoterone CREAM;TOPICAL 213433-001 Aug 26, 2020 RX Yes Yes ⤷  Start Trial ⤷  Start Trial METHOD OF TREATING ACNE VULGARIS WITH TOPICALLY APPLIED CORTEXOLONE 17A-PROPIONATE ⤷  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

International Family Members for US Patent 9,486,458

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 2503005 ⤷  Start Trial C20250037 Finland ⤷  Start Trial
European Patent Office 2503005 ⤷  Start Trial CA 2025 00047 Denmark ⤷  Start Trial
European Patent Office 2503005 ⤷  Start Trial 301358 Netherlands ⤷  Start Trial
European Patent Office 2503005 ⤷  Start Trial 2025C/551 Belgium ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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