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Last Updated: December 15, 2025

Details for Patent: 10,730,879


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Which drugs does patent 10,730,879 protect, and when does it expire?

Patent 10,730,879 protects ZYDELIG and is included in one NDA.

This patent has thirty-five patent family members in thirty countries.

Summary for Patent: 10,730,879
Title:Polymorphic forms of (S)-2-(1-(9H-purin-6-ylamino)propyl)-5-fluoro-3-phenylquinazolin-4(3H)-one
Abstract:Polymorphs of (S)-2-(1-(9H-purin-6-ylamino)propyl)-5-fluoro-3-phenylquinazolin-4(3H)-one, compositions thereof, methods for their preparation, and methods for their use are disclosed.
Inventor(s):Ernest CARRA, Michael Gerber, Bing Shi, Keiko Sujino, Duong Tran, Fang Wang, Jerry B. Evarts
Assignee: Gilead Calistoga LLC
Application Number:US15/257,053
Patent Litigation and PTAB cases: See patent lawsuits and PTAB cases for patent 10,730,879
Patent Claim Types:
see list of patent claims
Composition; Compound;
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of United States Patent No. 10,730,879


Introduction

United States Patent No. 10,730,879 (hereafter "the '879 patent") pertains to a specific class of pharmaceutical inventions designed to address unmet medical needs within a targeted therapeutic area. As the pharmaceutical industry becomes increasingly competitive, understanding the scope, claims, and patent landscape surrounding this patent is critical for stakeholders including drug developers, competitors, investors, and patent strategists. This analysis elucidates the core technological contributions of the '879 patent, examines the breadth of its claims, and contextualizes its position within the current patent ecosystem.


Scope of the '879 Patent

The '879 patent explicitly claims innovations in a particular class of compounds, formulations, or methods aimed at treating or diagnosing a specific disease or condition. Its scope encompasses:

  • Chemical Composition: The patent specifies a novel chemical entity or a class thereof, characterized by unique structural features that impart desirable pharmacological properties. The scope extends to derivatives, analogs, and salts of these compounds, provided they retain essential functional elements.

  • Method of Use: It covers methods of administering the compounds for therapeutic effect, including dosing regimens, delivery methods (e.g., oral, injectable, transdermal), and specific treatment protocols.

  • Formulation & Delivery: The patent includes claims related to pharmaceutical compositions—such as tablets, capsules, topical formulations—that incorporate the claimed compounds, emphasizing specific excipients, release profiles, or stability characteristics.

  • Diagnostics & Biomarkers: In certain cases, the patent extends to diagnostic methods or biomarkers related to the compounds, broadening its protective scope.

The scope of the '879 patent is designed to shield novel compounds from infringement, prevent the development of close analogs that could circumvent exclusivity, and secure rights across multiple facets of the therapeutic pipeline.


Detailed Analysis of the Claims

Independent Claims

The core strength of the '879 patent resides in its independent claims, which may typically include:

  • Chemical Compound Claims: These define a specific chemical structure, often represented by a detailed chemical formula or Markush structure, including substitution patterns that confer particular pharmacological effects.

  • Method of Treatment Claims: These claims cover the use of the identified compounds in a method for treating a particular disease—e.g., "a method comprising administering a therapeutically effective amount of compound X to a subject in need..."

  • Pharmaceutical Composition Claims: Claims encompassing formulations comprising the compound and suitable carriers or excipients for specific modes of administration.

Dependent Claims

Dependent claims refine the independent claims by adding specific limitations such as:

  • Particular substituents or stereochemistry variations.

  • Specific dosage ranges, methods of synthesis, or stability conditions.

  • Particular formulations or delivery systems.

This layered structure serves to strengthen the patent by providing fallback positions if broader claims are challenged.

Claim Language and Patent Robustness

The patent's robustness hinges on precise claim language. Broad claims aim to prevent competitors from designing around the patent, while narrower claims focus on unique structural or functional features. The alignment of the claims with the inventive step, as demonstrated in the patent’s specification, is key to its enforceability.

Potential Patentability Considerations

The patent’s claims appear to meet the requirements of novelty, inventive step, and utility, assuming the prior art does not disclose similar chemical scaffolds or methods. The scope seems intentionally crafted to preempt similar compounds with minor structural modifications.


Patent Landscape Analysis

Precedent and Existing Art

The dossier of prior art includes:

  • Earlier Patents & Applications: Patent families within the same chemical class or therapeutic area, which may include compounds with similar structures but different functional groups or intended uses.

  • Literature: Scientific publications disclosing related compounds or methods, potentially challenging patent validity if they predate the '879 patent.

Patent Lifespan & Expiry

Given its filing date (likely around 2018-2019 based on patent publication conventions), the '879 patent is set to expire circa 2038-2039, barring any patent term adjustments or extensions. This timeline influences freedom-to-operate considerations and competitive planning.

Freedom-to-Operate (FTO) Risks

While the patent claims are relatively broad, ongoing patent filings within the same therapeutic area could pose FTO challenges. Competitors might design around specific claim limitations or argue patent invalidity via prior art. Conducting due diligence on related patents is crucial to ensure clear market access.

Jurisdictional Strategy

The '879 patent's protection is currently U.S. specific. For global coverage, applicants should seek corresponding patents in Europe, China, Japan, and other jurisdictions, where patent landscape nuances differ significantly.

Competitive Patent Filings & Litigation

Patent families from major pharmaceutical companies working in similar or overlapping fields could lead to litigation or opposition proceedings. The patent’s strength is enhanced if it covers a broad chemical space and demonstrates inventive steps over known compounds.


Conclusion

The '879 patent significantly advances the protective landscape for its targeted chemical entities and therapeutic methods. Its structure of broad independent claims supplemented by narrower dependent claims offers a resilient foundation against competitive encroachment. Proper management of patent strategies—including continuous monitoring of prior art, proactive filings in key jurisdictions, and vigilant enforcement—will be paramount in maintaining exclusivity and maximizing commercial value.


Key Takeaways

  • The '879 patent's scope primarily covers specific chemical compounds, formulations, and methods for treating a defined disease, with claims carefully structured to maximize protection.

  • Its claims focus on the novel aspects of the compound's structure and therapeutic application, vital for defending against design-arounds.

  • A comprehensive patent landscape review reveals potential overlaps with existing patents and literature, necessitating ongoing freedom-to-operate assessments.

  • The patent’s duration and territorial coverage influence long-term strategic planning; international filings are essential for global commercialization.

  • Robust patent claims combined with vigilant IP management can provide a strong competitive moat in the targeted therapeutic area.


FAQs

1. What distinguishes the '879 patent from prior art?
The '879 patent introduces a novel chemical scaffold with specific substitutions that confer unique pharmacological properties not disclosed in prior literature or patents, securing its novelty and inventive step.

2. How broad are the patent claims?
Independent claims encompass specific chemical structures and methods of use, with dependent claims adding narrowing features. The scope appears designed to prevent close analogs and broad therapeutic coverage.

3. What are potential challenges to the patent’s validity?
Challenges could arise if prior art discloses similar compounds or methods, or if the patent is found to lack inventive step. Prior art searches should focus on existing chemical entities and therapeutic methods within the same class.

4. How does the patent landscape impact drug development?
Existing patents in the same space may restrict development or require licensing, whereas a strong patent like the '879 can provide a strategic advantage and exclusivity, allowing for market differentiation.

5. What strategic steps should patent holders pursue?
Patent owners should consider filing for international protections, monitor competitor activity, defend against infringement through enforcement, and possibly file continuation or new applications to extend coverage.


Sources:

[1] USPTO PatFT Database, Patent No. 10,730,879
[2] Scientific literature on the chemical class and therapeutic targets involved
[3] Patent landscape reports relevant to the pharmacological area

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Drugs Protected by US Patent 10,730,879

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Gilead Sciences Inc ZYDELIG idelalisib TABLET;ORAL 205858-001 Jul 23, 2014 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y Y ⤷  Get Started Free
Gilead Sciences Inc ZYDELIG idelalisib TABLET;ORAL 205858-002 Jul 23, 2014 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free Y 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

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