Enhanced Selective Inhibitors of EGFR Exon 20 Insertion Mutants

Publication ID: 24-11857513_0001_PTD
Published: October 28, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Enhanced Selective Inhibitors of EGFR Exon 20 Insertion Mutants,” Published Technical Disclosure No. 24-11857513_0001_PTD, Published October 28, 2025, available at https://archive.pr1or.art/24-11857513_0001_PTD
This technical disclosure describes improvements that would be readily apparent to a Person Having Ordinary Skill In The Art (PHOSITA) when considered in combination with the foundational architecture disclosed in U.S. Patent No. 11,857,513.

Summary of the Inventive Concept

This inventive concept improves upon the original patent by introducing novel methods, systems, and compositions for treating EGFR-mutated lung cancer, enhancing the efficacy and safety of selective inhibitors, and providing personalized treatment options.

Background and Problem Solved

The original patent disclosed a method for treating malignant lung tumors with EGFR exon 20 insertion mutations. However, the existing approach has limitations in terms of monitoring treatment response, identifying responsive patients, and ensuring optimal bioavailability and toxicity profiles of the inhibitors. This inventive concept addresses these limitations by introducing non-invasive diagnostic imaging techniques, personalized treatment systems, and optimized pharmaceutical compositions.

Detailed Description of the Inventive Concept

The new claims introduce several key advancements. Firstly, the method of claim 1 incorporates monitoring of treatment response using non-invasive diagnostic imaging techniques, enabling more accurate assessment of inhibitor efficacy. Secondly, the system of claim 2 provides personalized cancer treatment by analyzing genomic information and selecting corresponding selective inhibitors. Thirdly, the pharmaceutical composition of claim 3 enhances the bioavailability and reduces the toxicity of the inhibitors. Additionally, the method of claim 4 identifies responsive patients by detecting biomarkers associated with the inhibitor's efficacy, and the kit of claim 5 facilitates diagnosis of EGFR exon 20 insertion mutations.

Novelty and Inventive Step

The new claims introduce several novel and non-obvious features, including the use of non-invasive diagnostic imaging techniques for monitoring treatment response, the integration of genomic information analysis for personalized treatment, and the optimization of pharmaceutical compositions for enhanced bioavailability and reduced toxicity.

Alternative Embodiments and Variations

Alternative embodiments of the inventive concept could include the use of different non-invasive diagnostic imaging techniques, such as MRI or PET scans, or the integration of additional biomarkers for identifying responsive patients. Variations of the pharmaceutical composition could include different carrier molecules or formulations to further enhance the inhibitor's efficacy and safety.

Potential Commercial Applications and Market

The enhanced selective inhibitors of EGFR exon 20 insertion mutants have significant commercial potential in the oncology market, particularly in the treatment of non-small cell lung cancer. The personalized treatment approach and optimized pharmaceutical compositions could provide a competitive advantage in the market, and the diagnostic kit could generate additional revenue streams.

CPC Classifications

SectionClassGroup
A A61 A61K31/519
A A61 A61P35/00

Field of Art

Oncology, pharmaceutical chemistry, and molecular targeted cancer therapeutics, specifically focused on EGFR mutation-targeted inhibitors for lung cancer treatment

Person of Ordinary Skill (PHOSITA) Profile

A skilled practitioner with advanced degrees in molecular biology or pharmacology, expertise in cancer genetics, experience in designing targeted molecular inhibitors, and understanding of diagnostic and treatment methodologies for precision oncology

Obviousness Rationale

A person having ordinary skill in the art would recognize that the published technical disclosure represents predictable variations and extensions of the source patent's core methodology for treating EGFR exon 20 insertion mutations. The proposed modifications represent logical incremental improvements that would be apparent to a skilled researcher seeking to optimize diagnostic and treatment approaches. These variations demonstrate standard techniques of personalization, diagnostic refinement, and pharmaceutical optimization commonly employed in targeted cancer therapeutics.

Obvious Combinations & Variations

Source Patent Element
Method for detecting and treating malignant lung tumors with EGFR exon 20 insertion mutations
PTD Variation
Adding non-invasive diagnostic imaging for treatment response monitoring
Obviousness Reasoning
Monitoring treatment response using imaging is a known and predictable technique in oncology, representing a standard approach to assessing therapeutic efficacy
Source Patent Element
Selective inhibitor targeting specific EGFR mutations
PTD Variation
Developing a genomic database and computational system for mutation-specific inhibitor selection
Obviousness Reasoning
Personalized medicine approaches using computational analysis of genomic data are well-established and represent an obvious extension of precision oncology techniques
Source Patent Element
Pharmaceutical composition for EGFR mutation inhibition
PTD Variation
Incorporating carrier molecules to enhance bioavailability and reduce toxicity
Obviousness Reasoning
Pharmaceutical formulation optimization is a routine practice in drug development, with predictable methods for improving drug delivery and reducing side effects
Source Patent Element
Detection of EGFR exon 20 insertion mutations
PTD Variation
Creating a diagnostic kit with specific primers and probes for mutation identification
Obviousness Reasoning
Developing molecular diagnostic tools is a standard approach in genetic testing, using well-known molecular biology techniques for mutation detection
Source Patent Element
Treatment method for lung tumors with EGFR mutations
PTD Variation
Identifying patient responsiveness through biomarker analysis
Obviousness Reasoning
Biomarker-based patient stratification is a recognized method in precision medicine for predicting treatment efficacy and selecting appropriate therapeutic interventions
35 U.S.C. § 103 Summary: Pursuant to 35 U.S.C. ยง 103, the variations disclosed in this publication would have been obvious to a person having ordinary skill in the art at the time of invention, with a reasonable expectation of success, when considering the teachings of US Patent 11857513 in combination with standard oncological research methodologies. The incremental modifications represent predictable extensions of the source patent's core technological approach to treating EGFR exon 20 insertion mutations in lung cancer.

Original Patent Information

Patent NumberUS 11,857,513
TitleSelective inhibitor of exon 20 insertion mutant EGFR
Assignee(s)TAIHO PHARMACEUTICAL CO., LTD.