Dual core golf ball having negative-hardness-gradient...

Games using tangible projectile – Golf – Ball

Reexamination Certificate

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Reexamination Certificate

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08007376

ABSTRACT:
A golf ball comprising a thermoplastic inner core layer that has a geometric center hardness greater than its surface hardness to define a “negative” hardness gradient. An outer core layer is disposed about the inner core and is formed from a substantially homogenous thermoset composition, typically rubber, and has an inner surface hardness substantially less than its outer surface hardness to define a “positive” hardness gradient. An inner cover layer is disposed about the outer core layer and an outer cover layer is disposed about the inner cover layer.

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