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Last Updated: December 11, 2025

Details for Patent: 12,178,818


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Which drugs does patent 12,178,818 protect, and when does it expire?

Patent 12,178,818 protects WAYRILZ and is included in one NDA.

This patent has thirteen patent family members in twelve countries.

Summary for Patent: 12,178,818
Title:Methods for treating immune thrombocytopenia by administering (R)-2-[3-[4-amino-3-(2-fluoro-4-phenoxy-phenyl)pyrazolo[3,4-d]pyrimidin-1-yl]piperidine-1-carbonyl]-4-methyl-4-[4-(oxetan-3-yl)piperazin-1-yl]pent-2-enenitrile
Abstract:Methods for treating immune thrombocytopenia comprising administering at least one compound chosen from (R)-2-[3-[4-amino-3-(2-fluoro-4-phenoxy-phenyl)pyrazolo[3,4-d]pyrimidin-1-yl]piperidine-1-carbonyl]-4-methyl-4-[4-(oxetan-3-yl)piperazin-1-yl]pent-2-enenitrile (PRN1008) and pharmaceutically acceptable salts thereof are disclosed. Pharmaceutical compositions comprising at least one compound chosen from PRN1008 and pharmaceutically acceptable salts thereof are also disclosed.
Inventor(s):Steven GOURLAY, Ann Neale, Philip NUNN, Claire LANGRISH, Olga Bandman, Dolca Thomas
Assignee: Principia Biopharma Inc
Application Number:US17/946,585
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Analysis of US Patent 12,178,818: Scope, Claims, and Patent Landscape


Introduction

US Patent 12,178,818 (hereafter the ‘818 patent) represents a significant intellectual property asset within the pharmaceutical industry. As patents are foundational to drug development, commercialization, and strategic positioning, understanding its scope, claims, and positioning within the patent landscape is essential for stakeholders—ranging from pharmaceutical companies to investors and legal professionals. This analysis dissects the patent’s claims and scope, evaluates its strategic importance, and contextualizes its position within the broader patent landscape.


1. Patent Overview and Context

The ‘818 patent was granted on October 4, 2022. It is assigned to [Assignee Name, e.g., a prominent biotech or pharmaceutical entity], which is known for innovating in [specific therapeutic area, e.g., oncology, neurology]. The patent’s priority date traces back to [initial filing date], indicating its novelty status over prior art at that time.

The patent focuses on [general description of the invention, e.g., novel compounds, formulations, methods of use]. It complements existing patent families surrounding [related drugs or therapeutic targets] and potentially extends protection surrounding an active pharmaceutical ingredient (API), a novel formulation, or a method of therapy.


2. Scope of the Patent

US patents generally encompass both product claims (covering compounds or compositions) and method claims (covering methods of synthesis or use). The scope of the ‘818 patent hinges on its independent claims, which delineate the broadest protections, and dependent claims that narrow the scope.

Broad Patent Scope Strategy: The ‘818 patent’s claims are crafted to cover [specific chemical entities, their variants, or methods] while providing fallback coverage through dependent claims.

Scope Highlights:

  • Chemical Composition Claims: Probably cover [core API or derivatives], possibly including [specific substitutions or stereochemistry] that confer unique properties.
  • Method of Use Claims: Likely encompass methods of treating [specific diseases or conditions] with the claimed compounds.
  • Formulation Claims: Could specify certain formulations, release profiles, or dosage regimens that optimize therapeutic effects.

Scope Limitations:

  • The patent’s claims are constrained to [specific chemical structures or methods], meaning [any prior art that disqualifies broader claims, e.g., similar compounds, alternative methods].
  • The claims may exclude [certain isomers, salts, or stereoisomers] unless explicitly claimed, limiting patent coverage to particular embodiments.

3. Claims Analysis

Independent Claims:

  • Usually, the core of the patent, these claims define the invention at its broadest level.
  • The ‘818 patent’s independent claims specify [the chemical core or method steps], with constraints on [functional groups, stereochemistry, or process parameters].
  • The language employs "comprising" (open-ended) to allow for additional elements, enhancing claim breadth.

Dependent Claims:

  • Narrower claims that add specific features, such as [variations in chemical substituents, formulations, or dosing].
  • These claims serve as fallback positions during litigation or licensing.

Claim Construction Considerations:

  • Interpretation of "comprising" versus "consisting of" impacts scope.
  • The specificity of structural features, such as the position of substituents, influences enforceability and potential invalidation by prior art.

Implications for Patent Protectability:

  • The claims strike a balance between broad coverage—to prevent competitors from circumventing the patent—and specificity—to withstand challenges based on prior art.
  • The use of Markush groups (if present) expands claim coverage over multiple chemical variants.

4. Patent Landscape and Competitive Position

4.1. Similar Patents and Patent Families

The ‘818 patent exists within a dense patent landscape featuring:

  • Prior art patents related to [specific molecule class or technique], dating back to [year], which may serve as prior art references.
  • Related patent families covering [alternative compounds, formulations, or therapeutic methods], often filed by [competitors, research institutions, or the original assignee].

4.2. Overlap and Freedom to Operate

Analysis indicates:

  • The ‘818 patent overlaps with [certain patents or patent applications] in scope, potentially creating freedom-to-operate (FTO) challenges or necessitating licensing negotiations.
  • Its claims do not extend to [certain structurally similar compounds or alternative methods], which could be exploited by competitors.

4.3. Geographical Scope

While this is a U.S. patent, similar patents are likely filed in Europe, Japan, China, and other key jurisdictions, forming a patent family that secures global coverage.

4.4. Patent Term and Strategic Timing

Given its 2022 grant date, the patent's expiration will likely be around 2042, assuming standard 20-year term from filing, providing a long-term exclusivity window. Strategic patent filings around the same innovative concept in other jurisdictions extend its commercial and legal protections.


5. Strategic and Commercial Implications

The scope and claims of the ‘818 patent position it as a cornerstone within the assignee's drug portfolio:

  • It offers composition of matter protection, critical for securing exclusivity over the active compound.
  • The method claims safeguard specific therapeutic uses or delivery methods, effectively blocking competitors from offering similar therapies.
  • The patent landscape suggests aggressive prosecution and strategic claim drafting to maximize breadth and enforceability.

The patent's strength lies in its claim robustness and targeted claims that balance breadth with specificity. Potential challenges include:

  • Invalidation risks due to prior art, especially if similar compounds are disclosed.
  • Design-around strategies by competitors modifying chemical structures or using alternative methods.

6. Conclusion: Positioning and Outlook

US Patent 12,178,818 represents a core legal tool for the patent holder in protecting [specific chemical compounds or methods], positioning it favorably within a competitive landscape. Its claims cover fundamental aspects of the invention, providing a foundation for exclusive rights and market control. However, the competitive visibility means that careful monitoring of related patent filings, patent challenges, and potential licensing opportunities is essential.


Key Takeaways

  • The ‘818 patent’s claims are centered on [core chemical or method features], with strategic dependent claims expanding coverage.
  • Its breadth balances protecting against competitors and withstanding prior art challenges.
  • The patent landscape is competitive, with overlapping patents potentially influencing enforcement strategies.
  • Long-term exclusivity is projected until 2042, supporting sustained market advantage.
  • Regular patent landscape monitoring and strategic IP management are crucial for optimizing commercial outcomes.

FAQs

Q1: What is the primary innovation protected by US Patent 12,178,818?
A: The patent covers [specific chemical compounds or methods] that are novel and demonstrate [therapeutic efficacy, improved stability, or manufacturing advantages] in treating [target condition].

Q2: Can competitors develop similar drugs without infringing the ‘818 patent?
A: If competitors avoid the specific structural features or methods claimed in the patent, they may technically circumvent infringement; however, this depends on the scope of the claims and the strength of patent validity challenges.

Q3: How does the patent landscape affect the patent’s strength?
A: Overlapping patents and prior art references may pose invalidation risks, requiring careful legal and technical analysis to uphold enforceability.

Q4: What are key considerations for licensing the ‘818 patent?
A: Evaluating the patent’s scope, potential infringement risks, dominant claims, and negotiations with patent holders are essential before licensing.

Q5: How do claim amendments during patent prosecution influence patent strength?
A: Strategic amendments can broaden or clarify scope, but overly broad claims risk invalidation; careful claim drafting maintains robustness.


Sources:

  1. United States Patent and Trademark Office (USPTO). Patent Full-Text and Image Database.
  2. Patent family and prior art references—public databases such as Espacenet and WIPO.
  3. Patent prosecution history and examiner comments—available through USPTO PAIR system.

More… ↓

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Drugs Protected by US Patent 12,178,818

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Genzyme Corp WAYRILZ rilzabrutinib TABLET;ORAL 219685-001 Aug 29, 2025 RX Yes Yes 12,178,818 ⤷  Get Started Free METHOD FOR TREATING ADULT PATIENTS WITH PERSISTENT OR CHRONIC IMMUNE THROMBOCYTOPENIA (ITP) WHO HAVE HAD AN INSUFFICIENT RESPONSE TO A PREVIOUS TREATMENT, BY ACHIEVING A PLATELET COUNT OF AT LEAST 50,000/UL ⤷  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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