Patent ID: 7147578

Claim:
A golf ball comprising: a dual core including a center component and a core layer disposed about said center component, said center component comprising a thermoset material, wherein said thermoset material comprises a polyurethane, and said core layer comprising a thermoplastic material, wherein said center component of said dual core has an outer diameter of from about 0.500 inches to about 1.250 inches, and said dual core has an outer diameter of from about 1.25 to about 1.600 inches, and further wherein at least one of said core layer and said center component of said dual core comprise an agent that is foamed or otherwise reduced in density; and a cover layer assembly disposed about said dual core wherein said cover layer assembly includes at least one of (i) an inner cover layer having a Shore D hardness of 65 or less, said inner cover layer being harder than said outer cover layer, (ii) an inner cover layer having a Shore D hardness of 65 or less and an outer cover layer having a Shore D hardness of 65 or greater, wherein said inner cover layer is softer than said outer cover layer, or (iii) a single outer cover layer having a Shore D hardness of from about 40 to 80.