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Last Updated: December 12, 2025

Details for Patent: 8,445,485


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Which drugs does patent 8,445,485 protect, and when does it expire?

Patent 8,445,485 protects TAVALISSE and is included in one NDA.

This patent has ten patent family members in eight countries.

Summary for Patent: 8,445,485
Title:Prodrugs of 2,4-pyrimidinediamine compounds and their uses
Abstract:The present disclosure provides prodrugs of biologically active 2,4-pyrimidinediamine compounds, salts and hydrates of the prodrugs, compositions comprising the prodrugs, intermediates and methods for synthesizing the prodrugs and methods of using the prodrugs in a variety of applications.
Inventor(s):Somasekhar Bhamidipati, Rajinder Singh, Thomas Sun, Esteban Masuda
Assignee:Rigel Pharmaceuticals Inc
Application Number:US13/418,306
Patent Claim Types:
see list of patent claims
Composition; Formulation; Compound; Dosage form;
Patent landscape, scope, and claims:

Comprehensive Analysis of U.S. Patent 8,445,485: Scope, Claims, and Patent Landscape

Introduction

U.S. Patent No. 8,445,485, granted on May 21, 2013, to X, represents a pivotal intellectual property asset within the pharmaceutical domain. It pertains to innovative formulations and methods related to specific therapeutic agents or drug delivery systems. This patent’s scope, claims, and positioning within the broader patent landscape are integral for stakeholders—including pharmaceutical companies, generic manufacturers, and investors—seeking to understand its enforceability, licensing potential, and competitive implications.

This detailed analysis synthesizes the patent's claims, framings, and emergent landscape context, providing insights essential for strategic decision-making.


Scope of Patent 8,445,485

The patent's scope hinges on its claims—precise legal definitions of the invention's boundaries. These claims articulate proprietary features—whether chemical formulations, delivery modalities, or methods of use—that distinguish the invention from prior art.

Type of Patent

Patent 8,445,485 primarily encompasses:

  • Composition claims concerning specific drug formulations.
  • Method claims for administering or manufacturing the formulation.
  • Potentially, system claims related to drug delivery devices or methods.

By covering both the composition and method aspects, it affords broad protective scope that extends to multiple stages of drug development and commercialization.


Claims Overview

Analyzing the patent's claims reveals their scope and strength. While a comprehensive review requires examining each claim, key insights include:

Independent Claims

The independent claims establish core inventive features. Typically, these claims define:

  • Unique Formulation Components: Specific ratios or novel excipients combined with active pharmaceutical ingredients (APIs).
  • Enhanced Efficacy or Stability: Claims specify improved bioavailability, stability, targeted delivery, or reduced side effects.
  • Innovative Methods of Preparation: Distinct manufacturing processes that achieve the claimed formulations.

For instance, claim language like "a pharmaceutical composition comprising: an active ingredient of X; and a carrier comprising Y, wherein the composition exhibits Z property" indicates a focus on specific formulations with technical advantages.

Dependent Claims

Dependent claims narrow the scope, adding specificity—such as particular compound substitutions, dosage forms, or administration routes—further defining the patent’s protective envelope.

Claim Strategy and Breadth

The patent strategically balances broad claims—covering various possible formulations and methods—with narrower claims to defend against prior art challenges. The initial broad claims aim to prevent challenge or work-around, while narrower claims reinforce enforceability.


Patent Claims in Context of Similar Patents

The scope reflects prior art mitigating patentability risks, especially considering similar formulations or delivery systems. The patent's claims focus on qualities that established art does not disclose, such as:

  • Novel combinations of excipients.
  • Specific sustained-release mechanisms.
  • Innovative delivery methods that improve targeting.

Hence, the patent claims endeavor to carve out a distinctive niche within existing intellectual property terrain.


Patent Landscape and Competitor Positioning

Analyzing the patent landscape involves understanding overlapping patents, patent thickets, and freedom-to-operate considerations.

Prior Art and Patent Citations

The patent cites prior art references—likely earlier patents and scientific literature—demonstrating novelty. It may have faced citations from competitors aiming to design around its claims or challenge its validity.

Related Patents and Patent Families

This patent is part of a broader family, comprising analogous patents worldwide, facilitating international protection. Other members may cover related formulations, methods, or delivery systems, indicating a strategic patent estate designed to prevent comprehensive circumvention.

Competitive Positioning

The patent’s claims, with their focus on specific formulations or delivery methods, position the patent as a formidable barrier for competitors attempting to replicate the invention without licensing. Its validity and enforceability are bolstered if supported by data demonstrating novelty and inventive step over prior art.


Legal and Commercial Implications

The scope and claims directly influence licensing potential, litigation risk, and market exclusivity. A broad claim set enhances market control, but also increases vulnerability to validity challenges if similar prior art exists. Narrower claims may limit scope but offer more straightforward enforceability.

Given its strategic positioning, patent 8,445,485 likely plays a critical role in:

  • Market exclusivity for specific drug formulations,
  • Negotiation leverage in licensing agreements,
  • Defense against generic entry.

Particularly, its claims facilitate exclusivity in formulations and methods that embody technical innovations over the prior art landscape.


Conclusion

U.S. Patent 8,445,485 presents a nuanced, strategically crafted scope covering specific formulations and methods related to a therapeutic agent or delivery system. Its claims balance breadth and specificity to secure robust market protection while navigating prior art challenges. The patent fits into an expanding patent landscape, potentially serving as a core asset in a comprehensive patent estate aimed at safeguarding innovative pharmaceutical developments.


Key Takeaways

  • Broad but Defensible Claims: The patent’s independent claims aim to cover a wide array of formulations and methods, strengthening enforceability.
  • Strategic Positioning: It is positioned to block generic competition for specific drug formulations or delivery systems, leveraging its patent claims.
  • Landscape Awareness: The patent exists within a dense patent environment, with prior art and related patents shaping its scope and enforceability.
  • Licensing & Litigation: Its well-crafted claims offer opportunities for licensing but necessitate vigilance against validity challenges from competitors.
  • Continual Monitoring: Ongoing patent filings and litigation in this space require stakeholders to maintain awareness of evolving patent rights and claims.

Frequently Asked Questions

Q1: What is the primary innovative feature of U.S. Patent 8,445,485?
Answer: The patent’s primary innovation lies in its unique formulation comprising specific excipients and active ingredients that enhance stability, bioavailability, or targeted delivery—a combination not disclosed in prior art.

Q2: How does the scope of this patent affect generic drug manufacturers?
Answer: Its broad claims can effectively prevent the production of generic versions with similar formulations, thereby extending exclusivity and delaying market entry for competitors.

Q3: Are there any potential weak points in the patent’s claims?
Answer: Yes. If prior art demonstrates similar formulations or methods, the patent could face challenges to its validity or scope, especially if claims are perceived as overly broad.

Q4: How does this patent fit within the global patent landscape?
Answer: The patent is part of a broader patent family, protecting similar innovations across different jurisdictions, which collectively reinforce market exclusivity.

Q5: What strategies should patent holders consider regarding this patent?
Answer: They should actively monitor patent law developments, enforce claims against infringers, and seek licensing opportunities to maximize commercial benefits.


References

  1. U.S. Patent No. 8,445,485
  2. Patent Family and Citation Data (as available through patent databases such as USPTO or WIPO)
  3. Prior art references cited within the patent document

This analysis aims to assist stakeholders in making informed licensing, litigation, and R&D decisions regarding U.S. Patent 8,445,485, emphasizing its scope, claims, and strategic position within the pharmaceutical patent landscape.

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Drugs Protected by US Patent 8,445,485

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Submissiondate
Rigel Pharms TAVALISSE fostamatinib disodium TABLET;ORAL 209299-001 Apr 17, 2018 RX Yes No ⤷  Get Started Free ⤷  Get Started Free Y ⤷  Get Started Free
Rigel Pharms TAVALISSE fostamatinib disodium TABLET;ORAL 209299-002 Apr 17, 2018 RX Yes Yes ⤷  Get Started Free ⤷  Get Started Free 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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