Advanced Composite Foam for Specialized Footwear Applications

Publication ID: 24-11857024_0009_PTD
Published: October 27, 2025
Category:Specialized Variations & Niche Solutions

Legal Citation

pr1or.art Inc., “Advanced Composite Foam for Specialized Footwear Applications,” Published Technical Disclosure No. 24-11857024_0009_PTD, Published October 27, 2025, available at https://archive.pr1or.art/24-11857024_0009_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 disclosed a high-performance composite foam for midsoles, but it lacked adaptability for specific, narrow markets or unique operational environments. This invention addresses the limitations of the original patent by providing specialized variations of the composite foam, tailored to meet the demands of high-security, disaster relief, extreme weather conditions, and search and rescue applications.

Novelty and Inventive Step

The new claims introduce novel and non-obvious variations of the original composite foam, including enhanced shock absorption, thermal insulation, grip, and self-healing properties. These specialized features address specific needs in high-security, disaster relief, extreme weather conditions, and search and rescue applications, providing a significant inventive step over the original patent.

Alternative Embodiments and Variations

Alternative embodiments of the invention may include using different types of thermoplastic elastomers or polyurethane matrices to achieve the desired properties. Additionally, the foam could be formulated with additives or coatings to enhance its performance in specific environments. Other variations may include using different shapes or geometries for the pelletized expanded thermoplastic elastomer to optimize its performance in various applications.

Potential Commercial Applications and Market

The enhanced composite foam has significant commercial potential in the footwear industry, particularly in niche markets such as high-security, disaster relief, extreme weather conditions, and search and rescue operations. The invention could be licensed to manufacturers of specialized footwear, providing a competitive advantage in these markets.

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

Footwear materials engineering, specifically composite foam technologies for performance midsoles, involving polymer chemistry, material science, and athletic shoe design with expertise in thermoplastic elastomers and polyurethane matrix compositions

Person of Ordinary Skill (PHOSITA) Profile

A materials engineer or polymer scientist with advanced degree, 3-5 years industrial experience in footwear material development, familiar with elastomer compounding, thermal processing techniques, and performance optimization of composite foam systems

Obviousness Rationale

A PHOSITA would recognize that the source patent's composite foam technology provides a fundamental platform for targeted performance modifications. The disclosed variations represent predictable extensions of known material science principles, applying standard engineering approaches to adapt the base composite foam for specialized environmental and functional requirements. The core material composition remains substantially consistent, with modifications achievable through routine material engineering techniques.

Obvious Combinations & Variations

Source Patent Element
Pelletized expanded thermoplastic elastomer mixed within polyurethane matrix
PTD Variation
Enhanced shock absorption properties for high-security applications
Obviousness Reasoning
Modifying material density and pellet geometry is a standard design approach for adjusting impact resistance, representing a predictable result within material engineering practice
Source Patent Element
Thermoplastic elastomer blend with polyurethane matrix
PTD Variation
Thermal insulation properties for extreme weather footwear
Obviousness Reasoning
Incorporating thermal additives or selecting specific polymer blends to modify thermal conductivity is a known technique in composite material development
Source Patent Element
Spheroid pelletized elastomer with 1-12mm dimensional range
PTD Variation
Self-healing foam properties through strategic polymer selection
Obviousness Reasoning
Selecting elastomers with inherent self-healing characteristics represents a finite set of predictable material science solutions within polymer engineering
Source Patent Element
Expanded thermoplastic polyester elastomer matrix
PTD Variation
Disaster-relief midsole with enhanced environmental resistance
Obviousness Reasoning
Adjusting polymer composition to improve chemical and environmental stability is a standard materials engineering approach with expected, reproducible outcomes
Source Patent Element
Polyurethane matrix with thermoplastic elastomer integration
PTD Variation
Improved traction and grip properties for search and rescue applications
Obviousness Reasoning
Surface modification and strategic polymer selection to enhance friction characteristics represents a routine design optimization within material science
35 U.S.C. § 103 Summary: Based on US Patent 11857024's comprehensive disclosure of composite foam technologies, the present publication demonstrates that the claimed variations represent obvious extensions of existing material science principles. A person having ordinary skill in the art would recognize these modifications as predictable adaptations achievable through routine engineering techniques, thereby rendering subsequent claims of novelty invalid under standard obviousness analysis.

Original Patent Information

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