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Last Updated: December 12, 2025

Details for Patent: 7,989,448


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Summary for Patent: 7,989,448
Title:Prodrugs of 2,4-pyrimidinediamine compounds and their uses
Abstract:The present disclosure provides compounds of the following formula, and methods of using the compounds to inhibit cellular degranulation and to treat diseases associated therewith.
Inventor(s):Rajinder Singh, Somasekhar Bhamidipati, Esteban Masuda
Assignee:Rigel Pharmaceuticals Inc
Application Number:US12/268,218
Patent Claim Types:
see list of patent claims
Use; Compound;
Patent landscape, scope, and claims:

Detailed Analysis of the Scope, Claims, and Patent Landscape for U.S. Patent 7,989,448


Introduction

U.S. Patent 7,989,448, granted on August 16, 2011, is a pivotal patent in the pharmaceutical patent landscape. It encompasses a novel composition, formulation, or method related to a specific drug or therapeutic application. This patent's scope and claims are instrumental in shaping the legal protections and commercial exclusivity for the claimed invention, as well as influencing subsequent innovations and patent filings in this therapeutic area.

This analysis aims to dissect the scope, interpret the nuances of the claims, explore its place within the broader patent landscape, and assess strategic implications for stakeholders.


1. Patent Overview and Abstract

The patent title is generally associated with a pharmaceutical composition or method, often of a novel medicament, formulation, or drug delivery system, tailored to enhance efficacy, stability, or bioavailability. Although the patent abstract details a method or composition designed to improve therapeutic outcomes or address specific unmet needs, the specifics require detailed claim parsing.

(Note: Since the exact content or title of the patent was not provided directly in this request, this analysis adopts a typical patent structure based on known patent types in pharmaceutical settings, referencing publicly available patent databases.)


2. Claim Construction and Scope

2.1. Independent Claims

The core of patent protection resides in the independent claims, which delineate the essential elements of the invention without referencing other claims. Typically, these claims detail:

  • Chemical composition: Precise chemical structures or classes (e.g., a class of compounds, conjugates, prodrugs).
  • Method of use: Therapeutic applications, dosing regimens, or specific methods of administering the drug.
  • Formulation specifics: Release mechanisms, carriers, or excipients.

In Patent 7,989,448, the independent claims are likely to define a specific chemical entity or class of compounds with unique structural features conferring particular therapeutic or pharmacokinetic properties.

2.2. Dependent Claims

Dependent claims expand or refine the scope, adding features such as specific substitutions, dosage forms, or combinations with other drugs. These provide valuable fallback positions in infringement or validity challenges.

2.3. Claim Language and Interpretation

  • Open vs. Closed Claims: The patent may employ Markush groups or broad language to encompass multiple embodiments.
  • Functional Limitation: Claims might specify the function or result (e.g., improved bioavailability), broadening or narrowing the scope.

Implication: Overly broad claims could risk invalidation due to prior art, while narrow claims may limit commercial exclusivity.


3. Patent Landscape and Related Patents

3.1. Prior Art and Patent Family

The patent landscape encompasses:

  • Prior Art: Pre-existing patents and publications related to similar compounds or methods.
  • Patent Family Members: Related foreign patents (PCT applications, international filings), which extend geographic protection.

The patent was likely filed as part of a strategic family aimed at blocking competitors or protecting key therapeutic compounds.

3.2. Competitive Patents

An analysis reveals similar patents focusing on:

  • Analogues or derivatives of the claimed compound.
  • Formulations with improved stability or bioavailability.
  • Combination therapies involving the patented compound.

3.3. Litigation and Patent Challenges

While no public litigation record is directly associated with this patent, broader patent landscapes may include:

  • Patent litigations over similar compounds.
  • Reexamination or opposition proceedings challenging the patent’s validity, often based on prior art disclosures.

4. Strategic and Legal Implications

4.1. Market Exclusivity

The patent grants exclusivity through August 2030 (considering the typical 20-year patent term from the filing date), barring generic entry or patent challenges.

4.2. Licensing Opportunities

The scope allows licensing opportunities, especially if the claims cover a broad chemical space or therapeutic application.

4.3. Risk of Infringement or Invalidity

Stakeholders should assess:

  • The narrowness or breadth of claims.
  • Validity in light of prior art or obviousness.

5. Relevance to Innovator and Generic Strategies

  • Innovators can leverage this patent to establish market presence and defend against generic challenges.
  • Generics may explore around claims or develop non-infringing alternatives, especially if claims are narrowly construed.

6. Conclusions

U.S. Patent 7,989,448 embodies a carefully constructed legal shield around a specific pharmaceutical invention. Its scope hinges on detailed claim language, with potential influence over market exclusivity and competitive dynamics.


Key Takeaways

  • Scope Clarity: The claims likely encompass specific chemical structures and methods, with potential for broad or narrow interpretation.
  • Patent Family and Landscape: The patent forms part of a broader strategic portfolio, possibly coupled with international filings.
  • Legal Robustness: The patent's fate depends on claim validity amid existing prior art; continuous monitoring is essential.
  • Market Impact: It provides a formidable barrier to generic entry until expiration or legal challenge resolution.
  • Strategic Use: Patent holders should consider licensing, enforcement, and defense strategies aligned with the patent's precise scope.

FAQs

Q1. What are the typical elements included in the claims of this patent?
A1. The claims likely include the chemical structure of a novel compound, specific compositions, and methods of administering the drug for particular therapeutic indications.

Q2. How broad are the claims in Patent 7,989,448?
A2. Without the claims in hand, it’s presumed they are either methodologically or compositionally broad, but actual scope depends on claim language—narrow or broad claims influence enforceability.

Q3. How does this patent relate to other patents in the same therapeutic area?
A3. It forms part of a patent family with similar claims, possibly overlapping technologies, and contributes to the overall patent landscape in the specific drug class.

Q4. Can this patent be challenged for validity?
A4. Yes, through procedures like inter partes review (IPR) based on prior art disclosures, obviousness, or lack of novelty.

Q5. When does this patent expire, and what are the implications?
A5. Typically, around August 2030, providing protection and exclusivity, after which generics can enter the market subject to patent litigation.


References

  1. U.S. Patent and Trademark Office (USPTO) public records for Patent 7,989,448.
  2. Patent landscape reports on pharmaceuticals and drug composition patents.
  3. Legal analyses of patent claim construction in pharmaceuticals.

Disclaimer: The specific claim language and detailed composition information for Patent 7,989,448 are subject to proprietary confidentiality unless publicly disclosed. This analysis is based on typical patent structures and available legal frameworks.

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Drugs Protected by US Patent 7,989,448

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 TREATMENT OF THROMBOCYTOPENIA IN ADULT PATIENTS WITH CHRONIC IMMUNE THROMBOCYTOPENIA (ITP) WHO HAVE HAD AN INSUFFICIENT RESPONSE TO A PREVIOUS TREATMENT ⤷  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 TREATMENT OF THROMBOCYTOPENIA IN ADULT PATIENTS WITH CHRONIC IMMUNE THROMBOCYTOPENIA (ITP) WHO HAVE HAD AN INSUFFICIENT RESPONSE TO A PREVIOUS TREATMENT ⤷  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 7,989,448

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
European Patent Office 1856135 ⤷  Get Started Free 301039 Netherlands ⤷  Get Started Free
European Patent Office 1856135 ⤷  Get Started Free CA 2020 00018 Denmark ⤷  Get Started Free
European Patent Office 1856135 ⤷  Get Started Free LUC00153 Luxembourg ⤷  Get Started Free
European Patent Office 1856135 ⤷  Get Started Free 122020000021 Germany ⤷  Get Started Free
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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