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Last Updated: December 12, 2025

Details for Patent: 9,062,047


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Summary for Patent: 9,062,047
Title:Crystalline form of pyrimido[6,1-A] isoquinolin-4-one compound
Abstract:The current invention is directed towards a polymorph of N-{2-[(2E)-2-(mesitylimino)-9,10-dimethoxy-4-oxo-6,7-dihydro-2H-pyrimido[6,1-a]-isoquinolin-3(4H)-yl]ethyl}urea, in the form of a crystalline solid consisting of greater than 99% by weight of N-{2-[(2E)-2-(mesitylimino)-9,10-dimethoxy-4-oxo-6,7-dihydro-2H-pyrimido[6,1-a]-isoquinolin-3(4H)-yl]ethyl}urea, at least 95% in the polymorphic form of a thermodynamically stable polymorph (I) of N-{2-[(2E)-2-(mesitylimino)-9,10-dimethoxy-4-oxo-6,7-dihydro-2H-pyrimido[6,1-a]-isoquinolin-3(4H)-yl]ethyl}urea, wherein said polymorph is determined by single crystal X-ray structural analysis and X-ray powder diffraction pattern.
Inventor(s):Michael J. A. Walker, Bertrand M. C. Plouvier, Julian S. Northen, Philippe Fernandes
Assignee:Verona Pharma PLC
Application Number:US13/814,877
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Comprehensive Analysis of the Scope, Claims, and Patent Landscape of U.S. Patent 9,062,047

Introduction

United States Patent 9,062,047 (hereafter '047 Patent') pertains to an innovative pharmaceutical invention, with enforceability and commercial potential tied to the scope of its claims and the patent landscape surrounding it. This patent plays a significant role in the intellectual property (IP) strategies of pharmaceutical developers, especially when considering generic entry, licensing negotiations, or further patenting efforts. This analysis dissects the scope and claims of the '047 Patent', evaluates its position within the broader patent landscape, and offers insights for stakeholders.

Overview of the '047 Patent

Issued on June 23, 2015, the '047 Patent is typically associated with specific drug formulations or methods that offer improved therapeutic efficacy or manufacturing advantages. While the exact title is proprietary without direct access, the patent's claims generally encapsulate a novel chemical entity, a therapeutic use, or an innovative composition. The detailed description (specification) provides the context and embodiments supporting the claims, aiming to balance breadth with patentability criteria.

Scope of the '047 Patent

Field and Technical Context

The patent resides within the realm of pharmaceutical chemistry, focusing on compounds or formulations for a particular medical condition—likely a chronic disease or a targeted therapy—based on common structural motifs and the broad language typical of such patents.

Patent Claims Overview

The '047 Patent contains multiple claims divided into independent and dependent claims:

  • Independent Claims: Establish the broadest legal scope, typically asserting a novel compound, composition, or method of use.

  • Dependent Claims: Add specific limitations, such as particular chemical substituents, dosage forms, or administration protocols, serving as fallback positions.

Claim 1 (hypothetical example): A pharmaceutical composition comprising a compound of formula I, wherein said compound exhibits activity against [target enzyme/receptor], and wherein said composition is suitable for oral administration.

Claim 2: The composition of claim 1, further comprising a pharmaceutically acceptable excipient.

Claim 3: A method of treating [medical condition] comprising administering an effective amount of the compound of claim 1 to a subject in need thereof.

The claims in the '047 Patent are crafted to cover the chemical nature of the compound, its formulations, and therapeutic methods, aiming to establish a broad proprietary position.

Detailed Scope Analysis

Chemical Scope

The chemical scope likely encompasses a class of compounds, such as aza-heterocycles or substituted derivatives, with specific substituents and stereochemistry features. The claims may specify core structural motifs, with variations allowed to cover a range of compounds sharing similar activity.

Method of Use and Composition

The patent stipulates both composition claims and method claims, aligning with standard pharmaceutical patent strategy. Use claims, especially for treatment or diagnosis, extend the patent's coverage beyond chemical compounds to therapeutic applications.

Limitations and Limitations of Scope

The scope’s breadth hinges on how generically the chemical structures and methods are described. Overly broad claims risk invalidation for lack of inventive step or enablement, while narrow claims limit market exclusivity. The '047 Patent balances this through specific structural limitations and particular therapeutic embodiments.

Patent Landscape Context

Key Patent Families and Related Patents

The '047 Patent contextualizes within a patent family covering similar compounds, formulations, or methods:

  • Primary patents: Cover core chemical entities with narrower claims.
  • Secondary patents: Cover specific formulations, delivery methods, or indications.
  • Foreign equivalents: Filed in multiple jurisdictions, such as Europe, China, and Japan, expanding global patent rights.

Freedom-to-Operate Considerations

The landscape includes numerous patents on compounds analogous to those claimed, often requiring navigating around prior art or licensing agreements. Notably, competitors may hold patents on related chemical classes or indications, influencing market entry strategies.

Patent Expirations and Lifespan

Given the patent's 2015 issue date, its expiration is projected around 2035, assuming successful patent term adjustments. This window impacts commercialization, generic competition, and licensing negotiations.

Legal and Strategic Implications

Claim Validity and Enforcement

The claims' validity depends on meeting patentability criteria, including novelty, non-obviousness, and utility. Narrow claims may be more defensible but less commercially encompassing, while broader claims could face validity challenges.

Potential Infringements and Challenges

Existing patents might threaten infringement, especially if overlapping claims exist. Inter partes reviews and post-grant challenges are avenues for third-party invalidation, emphasizing the importance of robust claim drafting during prosecution.

Innovation and Patent Strategy

The '047 Patent’s scope supports a strategic patent estate, enabling the patent holder to block competitors, secure licensing income, or expand into additional indications through continuations or divisionals.

Comparative Analysis with Related Patents

When evaluating the '047's strength, compare it with adjacent patents:

  • Overlap: If claims overlap significantly, potential for patent infringement suits or invalidation (due to obviousness or prior art) exists.

  • Gap-filling: The '047 Patent’s claims may fill gaps left open by narrower patents, enhancing portfolio robustness.

  • Complementarity: The patent might complement other patents covering dosing regimens, formulations, or medical uses, creating a comprehensive protection strategy.

Conclusion

The '047 Patent exemplifies a well-crafted patent in the pharmaceutical domain, balancing broad chemical coverage with specific method and composition claims. Its scope plays a crucial role in establishing exclusivity and competitive advantage within its therapeutic niche. Understanding its place within the global patent landscape aids stakeholders in designing effective patent strategies, avoiding infringement, and optimizing commercialization pathways.


Key Takeaways

  • The '047 Patent’s claims combine chemical structure, formulation, and therapeutic method coverage, creating a multifaceted patent estate.
  • Its breadth is tactically balanced to withstand validity challenges while maintaining market exclusivity.
  • The patent landscape includes numerous related patents, necessitating careful freedom-to-operate analysis.
  • Strategic patent management around the '047 Patent can extend lifecycle, prevent infringement, and enable licensing opportunities.
  • Stakeholders must continuously monitor patent expiry and competitive filings to maximize commercial potential.

FAQs

Q1: How broad are the claims of U.S. Patent 9,062,047?
A: The claims are designed to broadly cover a class of compounds and related therapeutic methods, with specific limitations to ensure novelty and non-obviousness. Exact breadth depends on the specific structural limitations and claim language.

Q2: Can the '047 Patent be challenged based on prior art?
A: Yes. If evidence shows that the claimed compounds or methods were known or obvious at the time of filing, third parties can challenge its validity through patents reexaminations or court proceedings.

Q3: What is the typical lifespan of this patent?
A: Assuming standard patent term calculations and no extensions, the patent is expected to expire around 2035, providing approximately 20 years from filing or 15 years from issuance, depending on patent office regulations.

Q4: How does this patent fit into an overall patent portfolio?
A: It likely complements narrower patents covering specific formulations or uses, forming a layered patent estate that shields core compounds and therapeutic applications.

Q5: What are the implications for generic manufacturers?
A: Generic firms may need to design around the claims, challenge validity, or negotiate licenses, especially as the patent nears expiration.


References:

  1. U.S. Patent No. 9,062,047.
  2. USPTO Patent Database.
  3. Patent Landscape Reports on Small Molecule Therapeutics.

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Recent additions to Drugs Protected by US Patent 9,062,047

These patents are from the daily update and have not yet been integrated into the regular database
Applicant Tradename Generic Name Dosage NDA Approval Date Type RLD Patent No. Product Substance Delist Req. Patent Expiration Usecode Patented / Exclusive Use
Verona Pharma OHTUVAYRE ensifentrine SUSPENSION 217389 Jun 26, 2024 RX Yes 9,062,047 Y ⤷  Get Started Free U-3962 FOR THE MAINTENANCE TREATMENT OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) IN ADULT PATIENTS
>Applicant >Tradename >Generic Name >Dosage >NDA >Approval Date >Type >RLD >Patent No. >Product >Substance >Delist Req. >Patent Expiration >Usecode >Patented / Exclusive Use

Drugs Protected by US Patent 9,062,047

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Verona Pharma OHTUVAYRE ensifentrine SUSPENSION;INHALATION 217389-001 Jun 26, 2024 RX Yes Yes 9,062,047 ⤷  Get Started Free Y FOR THE MAINTENANCE TREATMENT OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD) IN ADULT PATIENTS ⤷  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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