The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 2015
Filed:
Apr. 24, 2012
Kazuya Kamino, Kobe, JP;
Keiji Ohama, Kobe, JP;
Hirotaka Nakamura, Kobe, JP;
Dunlop Sports Co. Ltd., Kobe-shi, JP;
Abstract
A golf ballincludes a core, an envelope layerpositioned outside the core, a mid layerpositioned outside the envelope layer, and a coverpositioned outside the mid layer. The coreincludes a spherical centerand a core outer layerpositioned outside the center. The centerhas a diameter of 1 mm or greater and 15 mm or less. The difference (H4−H3) between the JIS-C hardness H4 of the coreat its surface and the JIS-C hardness H3 of the core outer layerat its innermost portion is equal to or greater than 10. The coverhas a Shore D hardness H7 less than 40. The Shore D hardnesses H5, H6 and H7 of the envelope layer, the mid layer, and the coversatisfy that H5>H6≧H7.