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:
Aug. 05, 2008
Filed:
Jul. 27, 2007
Jun Shindo, Chichibu, JP;
Eiji Takehana, Chichibu, JP;
Kae Yamazaki, Chichibu, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a golf ball having a core, an outermost cover layer and an intermediate layer therebetween. The core is made of a material obtained by molding under heat a rubber composition containing polybutadiene having a stress relaxation time (T) of 3.5 or less. The intermediate layer, which is of a specific thickness, is made primarily of a resin material of a specific hardness obtained by blending together (I) a sodium ion neutralization product of an olefin-unsaturated carboxylic acid random copolymer with (II) a magnesium ion neutralization product of an olefin-unsaturated carboxylic acid random copolymer. The outermost cover layer, which is of a specific thickness, is made primarily of a non-ionomeric resin material of a specific hardness. The golf ball has an excellent rebound, a good feel on impact, and an excellent scuff resistance.