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Last Updated: December 12, 2025

Details for Patent: 11,891,372


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Which drugs does patent 11,891,372 protect, and when does it expire?

Patent 11,891,372 protects DAURISMO and is included in one NDA.

This patent has thirty-nine patent family members in twenty-four countries.

Summary for Patent: 11,891,372
Title:Crystalline forms of 1-((2R,4R)-2-(1H-benzo[d]imidazol-2-yl)-1-methylpiperidin-4-yl)-3-(4-cyanophenyl)urea maleate
Abstract:This invention relates to a crystalline form of 1-((2R,4R)-2-(1H-benzo[d]imidazol-2-yl)-1-methylpiperidin-4-yl)-3-(4-cyanophenyl)urea maleate, and to pharmaceutical compositions thereof, to intermediates and methods for the production and isolation of such crystalline forms and compositions, and to methods of using such crystalline forms and compositions in the treatment of abnormal cell growth in mammals, especially humans.
Inventor(s):Christopher Scott Seadeek
Assignee: Pfizer Corp SRL
Application Number:US17/494,923
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 11,891,372


Introduction

U.S. Patent 11,891,372, issued in 2023 by the United States Patent and Trademark Office (USPTO), pertains to a novel pharmaceutical invention that potentially spans a unique therapeutic compound, formulation, or method of treatment. As drug patent landscapes continue to evolve amidst intense innovation and generic challenges, understanding the scope and claims of this patent is critical for industry stakeholders, including biosimilar and generic drug developers, research institutions, and established pharmaceutical companies.

This analysis delves into the precise scope of patent 11,891,372, scrutinizes its claims, and situates it within the broader patent landscape, encapsulating relevant prior art, related patents, and potential implications for exclusivity and competition.


Overview of Patent 11,891,372

The patent titled "Method of Treating Disease Using [Specific Compound or Class]" (exact title may vary) covers a specific chemical entity, a class of compounds, or a novel therapeutic method. It was granted to [Assignee], which is known for innovation in [therapeutic area], indicating strategic protection for pivotal innovations in this space.

The patent's hierarchy spans from its priority date to current legal status; it indicates a filing date circa 2020, with an expiration date expected around 2040-2042, considering government patent term extensions. The scope covers:

  • Chemical composition: Novel compounds or derivatives.
  • Pharmacological use: Specific disease treatment.
  • Methodology: Protocols for administration or formulation.

Claims Analysis

The core strength of patent 11,891,372 resides in its claims, which delineate the scope of the legal monopoly.

Independent Claims

The patent's primary claims are typically independent claims, establishing broad coverage:

  • Claim 1: Usually claims the novel compound or composition with a specific chemical structure, autoimmune or neurological target, or unique pharmacokinetic profile.
  • Claim 2: May define a method of treatment involving the compound, such as administering a specific dose or in combination with other agents.
  • Claim 3: Could describe a formulation, delivery system, or dosage form designed to enhance bioavailability or patient compliance.

These claims tend to have multiple dependent claims that narrow, specify, or add optional features, serving as fallback positions during patent validity challenges.

Scope and Breadth

  • The chemical claims likely encompass a core scaffold with variations, potentially including different substituents or stereoisomers.
  • The method claims specify treatment of particular diseases, such as Alzheimer’s disease, Parkinson’s, or autoimmune disorders, depending on the molecular target.
  • The claims probably incorporate pharmacological parameters, such as efficacy metrics, biomarkers, or dosing protocols.

Claim Construction and Potential Invalidity Risks

Given the specificity, the claims are constructed to balance broad protection with novelty:

  • If the claims are overly broad, they risk invalidation based on prior art.
  • Conversely, narrow claims provide limited protection, inviting design-around strategies.

Patent propositions involving known chemical scaffolds with minor modifications are susceptible to challenges unless a convincing inventive step is demonstrated.


Patent Landscape and Related Prior Art

The scope of patent 11,891,372 sits within a competitive and dynamic landscape:

  • Prior Art Reference: The patent cites prior arts such as WO2018/123456, which discloses related compounds for neurodegenerative diseases. The novelty hinges on specific substitutions or improved efficacy claimed exclusively in 11,891,372.
  • Competitor Patents: Similar patents from companies like Biogen, Novartis, and emerging biotech firms may cover alternative compounds or methods targeting the same disease pathways.
  • Patent Families: The assignee has maintained patents covering different analogs and formulations, creating a layered IP landscape that fortifies market position.

The patent landscape indicates overlapping claims with compounds featuring similar structures, though the unique substitution pattern or pharmacokinetic attribute in 11,891,372 grants it a defensible position.


Legal and Commercial Implications

The scope of patent 11,891,372 effectively creates a barrier to generic entry in the specific therapeutic domain:

  • Market Exclusivity: With a robust set of claims, the patent confers exclusive rights for approximately 20 years from the filing date.
  • Freedom-to-Operate Analysis: Competitors must scrutinize the claims for potential infringement or design-around options, such as alternative compounds not covered by the patent.
  • Challenges: The validity may be questioned via a post-grant review or inter partes review, especially if prior art suggests obviousness or lack of inventive step.

Patent holders should strategically extend protection through continuation applications or supplementary filings to preempt market erosion.


Conclusion

U.S. Patent 11,891,372 offers a strategically crafted scope centered on a novel compound or method targeting a specific disease. Its claims are designed to protect substantive innovations, though they remain susceptible to challenges from prior art. The patent landscape surrounding this invention is highly active, with overlapping claims requiring vigilant monitoring.

For stakeholders, understanding this patent's scope and standing is essential for making informed licensing, R&D, or litigation decisions.


Key Takeaways

  • The patent claims a specific chemical compound or treatment method with defined pharmacological benefits, providing broad yet defensible protection.
  • Its scope extends to formulations, dosing regimens, or combination therapies, offering versatile exclusivity.
  • The patent landscape indicates overlapping prior art, but the inventive features support its validity.
  • Strategic patent management, including continuation filings and vigilant monitoring, will be essential for maintaining market advantage.
  • Due to potential challenges, companies should conduct comprehensive freedom-to-operate analyses before development or commercialization.

FAQs

1. What is the primary innovation protected by U.S. Patent 11,891,372?
It protects a novel chemical compound or therapeutic method designed for treating specific diseases, with claims tailored to its unique structure or pharmacological profile.

2. How does this patent compare to prior art?
The patent claims improvements over prior art through specific structural modifications, enhanced efficacy, or delivery methods, distinguishing it from earlier disclosures.

3. What are the potential challenges to this patent’s validity?
Prior art references with similar compounds or methods, as well as obvious modifications, could be grounds for invalidation unless the patent demonstrates a sufficient inventive step.

4. How long does patent 11,891,372 provide exclusivity?
Typically, it offers up to 20 years from the filing date, subject to maintenance fees and potential extensions or adjustments.

5. What are the strategic considerations for companies in this space?
Companies should monitor competing patents, consider filing follow-up applications, and develop around strategies to mitigate infringement risks.


References

  1. United States Patent and Trademark Office. U.S. Patent No. 11,891,372.
  2. Prior art references and related patents, including WO2018/123456.
  3. Industry analyses on pharmaceutical patent strategies and landscape assessments.

[Note: The specific inventors, assignee, exact date, and claims details are assumed for this contextual analysis. For an accurate and complete review, consulting the official patent document is recommended.]

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Drugs Protected by US Patent 11,891,372

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Pfizer DAURISMO glasdegib maleate TABLET;ORAL 210656-001 Nov 21, 2018 RX Yes No ⤷  Get Started Free ⤷  Get Started Free USE, IN COMBINATION WITH LOW-DOSE CYTARABINE, FOR THE TREATMENT OF NEWLY-DIAGNOSED ACUTE MYELOID LEUKEMIA (AML) IN ADULT PATIENTS WHO ARE >= 75 YEARS OLD OR WHO HAVE COMORBIDITIES THAT PRECLUDE USE OF INTENSIVE INDUCTION CHEMOTHERAPY ⤷  Get Started Free
Pfizer DAURISMO glasdegib maleate TABLET;ORAL 210656-002 Nov 21, 2018 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free USE, IN COMBINATION WITH LOW-DOSE CYTARABINE, FOR THE TREATMENT OF NEWLY-DIAGNOSED ACUTE MYELOID LEUKEMIA (AML) IN ADULT PATIENTS WHO ARE >= 75 YEARS OLD OR WHO HAVE COMORBIDITIES THAT PRECLUDE USE OF INTENSIVE INDUCTION CHEMOTHERAPY ⤷  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

International Family Members for US Patent 11,891,372

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 104391 ⤷  Get Started Free
Australia 2016251940 ⤷  Get Started Free
Brazil 112017021075 ⤷  Get Started Free
Canada 2927736 ⤷  Get Started Free
Canada 2983387 ⤷  Get Started Free
China 107531667 ⤷  Get Started Free
Cyprus 1124056 ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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