Thermoplastic dual core having a negative gradient inner core and a positive gradient outer core
US9789367B2 · kind B2 · utility
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23References
9Claims
0Family size
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Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Dec 22, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C66/71
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A golf ball including 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 thermoplastic material 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.