Published Technical Disclosure Archive

Advanced Composite Foam Midsole Technology

Publication ID: 24-11857024_0001_PTD
Published: October 27, 2025
Category:Direct Improvements & Enhancements

Legal Citation

pr1or.art Inc., “Advanced Composite Foam Midsole Technology,” Published Technical Disclosure No. 24-11857024_0001_PTD, Published October 27, 2025, available at https://archive.pr1or.art/24-11857024_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. 11,857,024.

Background and Problem Solved

The original patent for composite foam for midsoles, while providing a high-performance material, still faced limitations in terms of bonding between the pelletized expanded thermoplastic elastomer and the polyurethane matrix, as well as mechanical properties. This new invention addresses these limitations by introducing surface modifiers, bonding agents, and cross-linking agents to enhance the foam's performance and versatility.

Novelty and Inventive Step

The new claims introduce several novel and non-obvious elements, including the use of surface modifiers, bonding agents, and cross-linking agents to enhance the foam's performance and versatility. These elements provide a significant improvement over the original patent, offering better bonding, mechanical properties, and customization capabilities.

Alternative Embodiments and Variations

Alternative embodiments of the invention could include varying the type and amount of surface modifiers, bonding agents, and cross-linking agents used, as well as exploring different polyurethane matrix formulations and pelletized expanded thermoplastic elastomer shapes and sizes. Additionally, the invention could be adapted for use in other applications beyond midsoles, such as insoles or other footwear components.

Potential Commercial Applications and Market

The enhanced composite foam for midsoles has significant commercial potential in the athletic footwear industry, where high-performance materials are in high demand. The invention's improved bonding and mechanical properties, as well as its customization capabilities, make it an attractive solution for footwear manufacturers seeking to differentiate their products and improve performance.

CPC Classifications

SectionClassGroup
A A43 A43B13/026
A A43 A43B13/04
C C08 C08J9/0061
C C08 C08L75/04
C C08 C08J2367/02
C C08 C08J2375/04
C C08 C08J2377/00
C C08 C08J2467/02
C C08 C08J2475/04
C C08 C08J2477/00

Field of Art

Polymer composite materials for footwear components, specifically midsole foam technologies, involving materials science, polymer chemistry, and athletic shoe engineering

Person of Ordinary Skill (PHOSITA) Profile

A materials engineer or polymer scientist with expertise in thermoplastic elastomers, polyurethane matrix formulations, and composite foam manufacturing, typically holding a MS/PhD in materials science or polymer engineering with 3-5 years industrial experience in footwear material development

Obviousness Rationale

A PHOSITA would recognize that surface modification, bonding agents, and cross-linking techniques are standard optimization strategies in polymer composite development. The PTD's variations represent predictable engineering improvements that extend the source patent's core composite foam technology through well-established materials science techniques. These modifications would be considered routine experimentation within the standard problem-solving approach of materials engineering.

Obvious Combinations & Variations

Source Patent Element
Pelletized expanded thermoplastic elastomer mixed in polyurethane matrix
PTD Variation
Adding surface modifier to enhance bonding between elastomer pellets and polyurethane matrix
Obviousness Reasoning
Surface modification is a known technique for improving interfacial adhesion in polymer composites, representing a predictable optimization approach
Source Patent Element
Spheroid pellets ranging 1-12mm in size
PTD Variation
Implementing computer-controlled molding to create variable stiffness profiles
Obviousness Reasoning
Controlling material geometry and composition through advanced manufacturing is a standard design approach for engineered composite materials
Source Patent Element
Thermoplastic polyester elastomer base material
PTD Variation
Introducing cross-linking agents to improve mechanical properties
Obviousness Reasoning
Cross-linking is a well-established method for enhancing polymer mechanical performance, representing a known technique in materials engineering
Source Patent Element
Composite foam for midsole applications
PTD Variation
Expanding potential applications beyond midsoles to other footwear components
Obviousness Reasoning
Adapting material technologies across related applications is a standard practice in materials and product development
Source Patent Element
Expanded thermoplastic elastomer composition
PTD Variation
Exploring alternative polymer blends and surface treatment strategies
Obviousness Reasoning
Systematic exploration of material variations is inherent to materials science research and development processes
35 U.S.C. § 103 Summary: Based on the teachings of US Patent 11857024, a person having ordinary skill in the art would find the variations disclosed herein to be obvious extensions of the prior art, representing predictable engineering modifications that do not rise to the level of non-obvious invention. The disclosed techniques of surface modification, bonding enhancement, and manufacturing optimization represent routine problem-solving within the established technological domain of composite foam materials for footwear applications.

Original Patent Information

Patent NumberUS 11,857,024
TitleComposite foam for midsole
Assignee(s)Columbia Sportswear North America, Inc.