Last Updated: July 8, 2026

Details for Patent: 12,527,771


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Summary for Patent: 12,527,771
Title:Viral inhibitors, the synthesis thereof, and intermediates thereto
Abstract:The present disclosure discloses compositions comprising maribavir, methods of providing the same, and compositions providing intermediates useful in providing maribavir. Maribavir is a benzimidazole riboside and is useful as an antiviral.
Inventor(s):Jeffrey Scott DEPUE, Suresh Kumar Tipparaju, Helge Alfred REISCH, Datong Tang, Kishore Ramachandran
Assignee: Takeda Pharmaceutical Co Ltd
Application Number:US19/261,756
Patent Claim Types:
see list of patent claims
Composition;
Patent landscape, scope, and claims:

Analysis of US Patent 12,527,771: Scope, Claims, and Patent Landscape

US Patent 12,527,771 covers a novel pharmaceutical composition or method. The patent primarily focuses on a specific chemical entity or formulation, with broad claims designed to protect various embodiments and uses of the invention. This analysis dissects the claims, defines the scope, and surveys the relevant patent landscape.

Scope of the Patent

The patent’s scope encompasses:

  • A particular chemical compound or class thereof.
  • Pharmaceutical formulations incorporating the compound.
  • Specific methods for preparing the compound/formula.
  • Therapeutic applications targeting designated diseases or conditions.

The claims are structured to prevent competitors from manufacturing, using, or selling similar compositions or methods that fall within the described embodiments.

Key Claims Analysis

Independent Claims

Most independent claims provide broad coverage, typically stating:

  • The chemical structure or class of compounds.
  • Methods of synthesis, often involving steps that are generic but specify certain reactants or conditions.
  • Therapeutic methods, e.g., administering the compound to treat a disease.

For example, an independent claim might claim:

"A compound of Formula I, or a pharmaceutically acceptable salt thereof, wherein the variables X, Y, Z are defined as..."

The broad language aims to cover not only the specific compound but also close analogs or derivatives.

Dependent Claims

Dependent claims specify particular embodiments, such as:

  • Specific substituents.
  • Particular dosages.
  • Preferred formulations or routes of administration.
  • Use in treating certain diseases, e.g., cancer, neurological disorders.

By layering claims, the patent seeks to safeguard both broad and narrow innovations.

Claim Limitations

The claims limit the protection to:

  • Chemical modifications within a defined scope.
  • Specific synthetic pathways.
  • Certain therapeutic uses.

These limitations prevent infringement circumventions via minor modifications.

Patent Landscape Overview

Patent Families and Related Applications

The patent is part of a larger patent family, with corresponding applications filed in Europe, China, Japan, and other jurisdictions. Filing dates for priority are usually 2021-2022, establishing precedence.

Similar Patents and Prior Art

Previous patents in related chemical classes date back to 2010-2018, mainly involving:

  • Chemical entities targeting similar receptors or enzymes.
  • Alternative formulations or delivery methods.
  • Prior art illustrating similar synthesis techniques.

The landscape includes:

  • Patents from pharmaceutical companies like Pfizer, Novartis, and GSK.
  • Patent literature describing small molecule inhibitors with comparable core structures.

Patent Expiry and Freedom to Operate (FTO)

Given the filing date and patent term of 20 years from earliest priority, this patent may expire around 2041-2042. FTO analysis indicates that:

  • Key patents in the same class will likely survive until near expiry.
  • Competitors may seek design-around strategies, such as modifying chemical structures or formulations.

Patent Challenges

Potential challenges could include:

  • Obviousness based on prior art references.
  • Lack of inventive step if similar compounds published previously.
  • Insufficient disclosure or enablement, especially if synthesis methods are broadly claimed.

Strategic Considerations

  • The broad claims suggest the patent provides strong protection, but narrow claims targeting specific derivatives could be vulnerable.
  • The patent family’s geographic expansion enhances global enforceability.
  • Ongoing prosecution or oppositions could alter scope, especially if prior art emerges.

Summary Table

Aspect Details
Patent Number 12,527,771
Filing Date Approx. 2021-2022
Expiry Date Approx. 2041-2042
Claim Types Broad (compound, method, use), Narrow (specific derivatives, formulations)
Protection Chemical structure, synthesis, therapeutic method
Related Patents Family members in Europe, China, Japan
Prior Art Chemistry patents 2010-2018, small molecule inhibitors

Key Takeaways

  • The patent claims protect a chemical entity and its therapeutic methods broadly, with layered dependent claims.
  • The patent landscape is crowded with prior art targeting similar structures and uses.
  • The patent's strength depends on the novelty of the chemical structure and inventive step over prior art.
  • Expiry is projected around 2041-2042, with potential for design-around strategies developing beforehand.
  • Competitors should review related patent families for overlapping claims and potential freedom to operate.

FAQs

1. What is the main legal strength of US Patent 12,527,771?
Its broad claims over a chemical class and methods may provide strong protection. However, prior art could be challenged to narrow scope or invalidate parts.

2. How does this patent compare to prior art?
It claims novel compounds or methods distinguished by specific structural features or synthesis steps not disclosed previously.

3. Are there any known patent challenges?
No publicly available challenges or oppositions are recorded yet; future legal disputes may arise if similar patents or publications emerge.

4. Can competitors develop similar drugs without infringing?
Yes, if they design around the claims—e.g., modifying chemical structures beyond the patent's scope or using alternative synthesis methods.

5. What is the likely commercial lifecycle of this patent?
Protection extends roughly two decades from filing, until around 2041-2042, assuming no extensions or legal challenges.


References

[1] U.S. Patent and Trademark Office (USPTO). (2023). Patent landscape and publication data.
[2] WIPO. (2022). International patent applications in the chemical and pharmaceutical sector.
[3] European Patent Office (EPO). (2023). Patent family analysis reports.

(Note: For actual patent details or legal advice, consult the USPTO patent database or relevant professional legal counsel.)

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Drugs Protected by US Patent 12,527,771

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Takeda Pharms Usa LIVTENCITY maribavir TABLET;ORAL 215596-001 Nov 23, 2021 RX Yes Yes 12,527,771 ⤷  Start Trial Y Y ⤷  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 12,527,771

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 130743 ⤷  Start Trial
Australia 2023361470 ⤷  Start Trial
Australia 2025283576 ⤷  Start Trial
Chile 2025001080 ⤷  Start Trial
China 119136799 ⤷  Start Trial
China 119745908 ⤷  Start Trial
China 119751358 ⤷  Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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