Golf ball
US10610740B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 12, 2018 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Oct 12, 2038 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B37/0037
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
An object of the present invention is to provide a golf ball having excellent spin performance on approach shots under a dry condition and excellent spin performance on approach shots under the condition that there is grass between the golf ball and the club face. The present invention provides golf ball comprising a golf ball body and a paint film formed on a surface of the golf ball body, wherein the paint film has a multi-layered construction composed of two or more layers, a ratio (M1/E1) of a 10% elastic modulus (kgf/cm2) (M1) of an innermost layer of the paint film to a maximum elongation (%) (E1) of the innermost layer of the paint film is 10 or more and 50 or less, and the ratio (M1/E1) of the innermost layer of the paint film is greater than a ratio (M2/E2) of a 10% elastic modulus (kgf/cm2) (M2) of an outermost layer of the paint film to a maximum elongation (%) (E2) of the outermost layer of the paint film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.