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:
Apr. 08, 1986
Filed:
May. 10, 1984
Applicant:
Inventors:
Kuniyasu Horiuchi, Kobe, JP;
Masao Nakamura, Kobe, JP;
Assignee:
Sumitomo Rubber Industries, Ltd., Kobe, JP;
Primary Examiner:
Int. Cl.
CPC ...
A63B / ; C08L / ; C08L / ;
U.S. Cl.
CPC ...
273 / ; 26099814 ; 524908 ; 525236 ; 525237 ;
Abstract
Pressureless tennis balls which comply with regulations of the International Tennis Federation and produce a satisfactory feel of striking retained over an extended period of play, and which comprises a hollow spherical core made from a rubber composition the rubber component of which contains 5 to 50% by weight of a particular modified polybutadiene containing 5 to 30% by weight of syndiotactic-1,2-polybutadiene and at least 40% by weight of cis-1,4-polybutadiene.