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:
Dec. 17, 2013
Filed:
Nov. 13, 2009
Kazuhiko Isogawa, Kobe, JP;
Tsutomu Hirau, Kobe, JP;
Hirotaka Nakamura, Kobe, JP;
Takahiro Shigemitsu, Kobe, JP;
Kazuhiko Isogawa, Kobe, JP;
Tsutomu Hirau, Kobe, JP;
Hirotaka Nakamura, Kobe, JP;
Takahiro Shigemitsu, Kobe, JP;
Dunlop Sports Co. Ltd., Kobe-Shi, JP;
Abstract
A first golf ballincludes a core, a mid-layer, and a cover. The coreincludes a centerand an envelope layer. The mid-layerincludes a metal ion source (C) that can neutralize an ionomer resin. The mid-layerhas a melt flow rate (at 190° C. and 2.16 kg) of 4 g/10 minute or greater. The difference (H-H) between the JIS-C hardness Hof the coverand the JIS-C central hardness Hof the centeris equal to or greater than 45. A second golf ballincludes a core, a mid-layer, and a cover. The mid-layerhas a melt flow rate (at 190° C. and 2.16 kg) of 4 g/10 minute or greater. Preferably, the mid-layerincludes a high melt viscosity resin (A), a low melt viscosity ionomer resin (B), and a metal ion source (C).