John T Loft, Steven G Plovan, Clifford M Vogt: Air permeable waterproof products having fabric-like aesthetic properties and methods for making the same. Celanese Corporation, January 13, 1976: US03932682 (50 worldwide citation)

Novel products are described which possess a capability of transmitting air and moisture vapor, are waterproof, and have fabric-like aesthetic properties. These products may have applications such as rainwear material, tent material, garment liners, and shoe liners. These products may be made by spr ...