04128950 is referenced by 125 patents and cites 5 patents.

An athletic shoe of reduced weight is described employing low density, closed cell, synthetic plastic foam for an intermediate sole layer and/or heel lift sole layer between a harder outer sole layer and the shoe upper. The foam is a polyethylene or ethylene vinyl acetate foam having a density not substantially less than 5 pounds per cubic foot, preferably at least 7 pounds per cubic foot. A lateral extending heel stabilizer plate of solid plastic material or a heel lift layer having a relatively hard outer border portion may be added to improve lateral stability.

Title
Multilayered sole athletic shoe with improved foam mid-sole
Application Number
5/766530
Publication Number
4128950
Application Date
February 7, 1977
Publication Date
December 12, 1978
Inventor
Dennis E Vixie
Eugene
OR, US
Stanley L James
Eugene
OR, US
William J Bowerman
Eugene
OR, US
Agent
Klarquist Sparkman Campbell Leigh Hall & Whinston
Assignee
BRS
OR, US
IPC
A43B 23/28
A43B 13/28
A43B 13/18
A43B 13/12
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