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:
Sep. 14, 2010
Filed:
Jul. 29, 2009
Hiroyuki Nagasawa, Chichibu, JP;
Yoshinori Egashira, Chichibu, JP;
Yoshihiro Yamana, Chichibu, JP;
Hidekazu Saito, Chichibu, JP;
Hiroki Kimura, Chichibu, JP;
Hiroyuki Nagasawa, Chichibu, JP;
Yoshinori Egashira, Chichibu, JP;
Yoshihiro Yamana, Chichibu, JP;
Hidekazu Saito, Chichibu, JP;
Hiroki Kimura, Chichibu, JP;
Bridgestone Sports Co., Ltd., Tokyo, JP;
Abstract
A method of manufacturing golf balls composed of a core and a cover of one or more layer that encloses the core, at least one cover layer being 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, which thermoplastic polyurethane composition cover layer has an inherent viscosity in a DMF solvent of larger than 1.5 dl/g and an inherent viscosity in a 0.05 mol/L n-butylamine-containing DMF solution of larger than 0.5 dl/g, the golf ball manufacturing method being characterized by: