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Medium gradient dual core golf ball

  • US 9,669,267 B2
  • Filed: 07/08/2015
  • Issued: 06/06/2017
  • Est. Priority Date: 11/28/2001
  • Status: Expired due to Term
First Claim
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1. A golf ball comprising:

  • an inner core layer having a first surface hardness and a geometric center hardness, the center hardness being less than the first surface hardness to define a first positive hardness gradient of about 1 to 12 Shore C;

    an outer core layer having a second surface hardness; and

    a cover layer disposed about the outer core layer;

    wherein the second outer surface hardness is greater than the geometric center hardness to define a second positive hardness gradient of about 12 to 22 Shore C, and wherein the first hardness gradient has a first slope, S1, and the second hardness gradient has a second slope, S2, and a ratio of S2 to S1 is about 10.0 or greater.

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