Patent ID: 9480881
Filing Date: 2016-11-01
CPC Classification: A63B

Claim Text:
1. A golf ball comprising: a unitary core having an outer surface, a geometric center, and a soft transition region adjacent to the outer surface, the core comprising a substantially homogenous composition; and an outer cover layer; wherein the soft transition region has a thickness of up to 4 mm, comprises about 15 to 30 percent trans-polybutadiene isomer, and has a negative hardness gradient of up to about 10 Shore C; and wherein the unitary core has an overall positive hardness gradient of about 15 Shore C to 22 Shore C and has a gradient quotient, GQ, defined by the equation: where G is the overall positive hardness gradient in Shore C, T is the percent of trans-polybutadiene isomer at the core outer surface, and COR is the coefficient of restitution measured at an incoming velocity of 125 ft/s.