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:
Jan. 20, 2009
Filed:
May. 04, 2005
Hiroyuki Nagasawa, Chichibu, JP;
Yoshinori Egashira, Chichibu, JP;
Yoshihiro Yamana, Tokyo, JP;
Hidekazu Saito, Kurashiki, JP;
Hiroki Kimura, Kurashiki, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Yoshinori Egashira, Chichibu, JP;
Yoshihiro Yamana, Tokyo, JP;
Hidekazu Saito, Kurashiki, JP;
Hiroki Kimura, Kurashiki, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
A golf ball composed of a core and one or more cover layer which encloses the core is characterized in that at least one cover layer is made of a thermoplastic polyurethane composition characterized by including at least 90 wt % of a thermoplastic polyurethane obtained by a polyurethane-forming reaction of an organic diisocyanate compound with a long-chain polyol and a chain extender, and in that the polyurethane composition cover layer is characterized that an inherent viscosity in a DMF solvent is larger than 1.5 dl/g and an inherent viscosity in a DMF solution containing 0.05 mol/L n-butylamine is larger than 0.5 dl/g. The golf ball has a high rebound, an excellent scuff resistance, is recyclable in a molding operation, and has excellent manufacturability.