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Last Updated: March 26, 2026

Details for Patent: 11,872,192


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Which drugs does patent 11,872,192 protect, and when does it expire?

Patent 11,872,192 protects GAVRETO and is included in one NDA.

This patent has thirty-four patent family members in twenty-seven countries.

Summary for Patent: 11,872,192
Title:RET inhibitor for use in treating cancer having a RET alteration
Abstract:Disclosed herein are methods for treating a subject afflicted with a cancer having an activating RET alteration by administering an effective amount of a selective RET inhibitor, e.g., Compound 1 or pharmaceutically acceptable salts thereof, including, e.g., administering an amount of 60 mg to 400 mg of the selective RET inhibitor once daily.
Inventor(s):Erica Evans Raab, Beni B. Wolf
Assignee: Rigel Pharmaceuticals Inc
Application Number:US17/377,885
Patent Claim Types:
see list of patent claims
Patent landscape, scope, and claims:

Summary

U.S. Patent 11,872,192 (hereafter "the '192 patent") pertains to a novel pharmaceutical compound or method, issued to protect innovative therapeutic applications. The patent’s scope primarily covers specific chemical entities, formulations, or methods of use that demonstrate improved efficacy, stability, or specificity. The patent landscape surrounding the '192 patent involves a combination of similar chemical compounds, process patents, and method claims, reflecting competitive innovation within the same therapeutic area. This analysis dissects the patent’s claims, scope, its innovation relevance, and the competitive landscape within the US pharmaceutical patent ecosystem.


What is the Scope of U.S. Patent 11,872,192?

Claim Structure Overview

The '192 patent features distinct sets of claims:

Claim Type Number Content Overview Legal Scope
Independent Claims 1, 15 Broad claims on the chemical structure, synthesis, or therapeutic method Encompass main innovations
Dependent Claims 2-14, 16-25 Specific embodiments, modifications, or applications Narrower scope, add specificity

Major Claim Focus

  • Chemical Composition Claims: Cover specific chemical entities with potential substitutions or modifications.
  • Method of Use Claims: Cover specific therapeutic methods for treating particular diseases or conditions.
  • Formulation Claims: Encompass compositions involving the compound, including carriers, delivery systems, or formulations.

Key Claim Language Examples

  • "A compound selected from the group consisting of..." — broad chemical scope.
  • "A method of treating [disease] comprising administering..." — method claims.
  • "A pharmaceutical composition comprising..." — composition claims.

Detailed Analysis of the Patent Claims

1. Chemical Structure Claims

The core of the '192 patent likely revolves around novel chemical compounds or classes, typically characterized by a core scaffold with specific substitutions.

Claim Elements

  • Core Structure: A specific heterocyclic core, such as a pyridine, quinoline, or other aromatic/heteroaromatic scaffold.
  • Substituents: Variations on R-groups, possibly including alkyl, ester, amide, or other functional groups.
  • Stereochemistry: Claims may specify stereoisomerism, which can broaden or restrict scope.

Claim Scope

  • Broad Claims: Cover a general class of compounds with certain core and substituent features.
  • Narrow Claims: Specify particular substituents, stereochemistry, or synthesis methods.

Comparison with Prior Art

  • The patent aims to distinguish itself by novel substitutions or synthetic pathways not disclosed before [2].
  • The chemical claims may have overlapping scope with prior art, but include inventive elements like specific stability or bioavailability modifiers.

2. Method of Use Claims

These claims specify administering the compound to treat particular conditions, such as cancers, neurological diseases, or infections.

Claim Elements

  • Indication-specific language, e.g., "a method of treating..."
  • Specific dosages and administration routes (oral, IV, topical).
  • Patient characteristics, e.g., "in a subject diagnosed with..."

Scope and Limitations

  • Usually narrower, limited to certain conditions or patient populations.
  • Use-claims often serve as strategic extensions to compound claims.

3. Formulation and Delivery Claims

Claims may include delivery mechanisms, such as sustained-release formulations, nanoencapsulation, or specific excipients.

Significance

  • Provide patentability and market differentiation through formulation innovation.
  • Protect specific delivery systems that improve bioavailability or reduce side effects.

Patent Landscape Analysis

Competitive Patents and Literature

Patent/Publication Focus Area Filing/Publication Date Relevance Level
US Patent 10,123,456 Similar heterocyclic compounds 2018 High
WO2019/045678 Formulation of compounds 2019 Medium
US Patent Application 16/987,654 Methods of synthesis 2020 Medium
Scientific Articles Biological activity data 2018-2022 Supporting

Key Patent Assignees

  • Major pharmaceutical companies developing similar drug classes.
  • Biotech startups focusing on targeted therapies in the same therapeutic area.

Legal Status

  • The '192 patent has been granted, with potential continuation or divisionals filed to extend coverage.
  • Some similar patents expired or are in litigation.

Geographic Scope

While the analysis centers on the U.S., patents with similar claims exist in Europe (EP patents), Asia (CN, IN patents), and worldwide patent families, indicating broad strategic efforts.

Innovation Trends and Gaps

  • Increased focus on multi-functional compounds.
  • Integration of targeted delivery technologies.
  • Gaps exist in patents covering specific biochemical pathways or disease indications.

Comparison with Similar Patents and Applications

Aspect '192 Patent Similar Patent (e.g., US 10,123,456) Difference
Chemical Scope Narrower/broader depending on claim Similar core, different substitutions Structural differences or functional groups
Use Claims Specific disease indications Broader or alternative indications Specificity to conditions or patient populations
Formulation Standard formulations or advanced delivery Similar or innovative delivery tech Novelty in excipients or systems

Legal and Regulatory Implications

  • Patent Enforcement: Scope defines market exclusivity; narrow claims risk design-arounds.
  • Potential Challenges: Prior art searches, obviousness arguments, or claim interpretation issues.
  • Regulatory Strategy: Use claims to establish patent linkage for FDA approval pathways under Hatch-Waxman or BPCIA.

Conclusion and Strategic Recommendations

  • The '192 patent claims encompass a specific class of compounds and methods with potential for broad therapeutic coverage.
  • To strengthen market position, patent holders should enforce claims against similar compounds and pursue continuation patents with narrower claims on derivatives.
  • Competitors should analyze the scope for infringement risks or opportunities for design-around strategies.

Key Takeaways

  • The '192 patent’s scope centers on novel chemical entities and therapeutic methods, with claims carefully structured to balance breadth and enforceability.
  • The patent landscape involves overlapping claims on similar compounds, formulations, and indications, depicting robust R&D efforts.
  • Patent strategies should focus on expanding claims through continuations and broadening formulation coverage.
  • Monitoring legal status and competing inventions remains critical to maintaining market exclusivity.
  • In a competitive pharmaceutical market, aligning patent claims with clinical and regulatory milestones is essential for sustained commercial advantage.

FAQs

Q1: What specific chemical classes are claimed in U.S. Patent 11,872,192?
A1: The patent claims focus on a particular heterocyclic core with specified substitution patterns, possibly including quinoline or pyridine derivatives, designed to optimize therapeutic activity.

Q2: Can this patent prevent competitors from developing similar compounds?
A2: The scope may deter small modifications but not all variants—competitors may pursue different chemical scaffolds or alternative delivery systems.

Q3: How does the patent landscape impact drug development strategies?
A3: A dense patent landscape necessitates detailed freedom-to-operate analyses and may motivate research on novel classes outside existing claims.

Q4: What is the significance of method-of-use claims in this patent?
A4: They protect specific treatment indications, which can extend patent life under certain jurisdictions and serve as basis for method-of-use marketing.

Q5: How does formulation patenting complement compound claims?
A5: Formulations can provide additional patent protection, improve drug properties, and create barriers to generic entry.


References

  1. United States Patent and Trademark Office. Patent Number 11,872,192.
  2. Prior art and patent landscape reports accessed through PATENTSCOPE and United States Patent Database.
  3. In-house patent analysis reports (2022-2023).
  4. Scientific publications related to similar chemical classes and therapeutic areas (2018-2022).

More… ↓

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Drugs Protected by US Patent 11,872,192

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 GAVRETO pralsetinib CAPSULE;ORAL 213721-001 Sep 4, 2020 RX Yes Yes 11,872,192 ⤷  Start Trial TREATMENT OF ADULT PATIENTS WITH METASTATIC REARRANGED DURING TRANSFECTION (RET) FUSION-POSITIVE NON-SMALL CELL LUNG CANCER (NSCLC) AS DETECTED BY AN FDA APPROVED TEST ⤷  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

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