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:
Jul. 07, 2020
Filed:
Feb. 14, 2018
Sumitomo Rubber Industries, Ltd., Kobe-shi, Hyogo, JP;
Yumi Suzuki, Kobe, JP;
Takeo Nakazono, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Kobe-Shi, Hyogo, JP;
Abstract
The rubber composition for a tread comprises: 5 to 30 parts by mass of a carbon black, 95 parts by mass or more of silica, 25 parts by mass or more of a powder of an inorganic compound represented by a given formula (A) and having an average primary particle size of 10 μm or less, and 70 parts by mass or more of a softening agent comprising 2 to 15 parts by mass of a coumarone-based resin, based on 100 parts by mass of a rubber component comprising 70% by mass or more of a styrene-butadiene rubber having a styrene content of from 20 to 50% by mass and a vinyl content of from 15 to 65%, and the tire has a tread composed of the rubber composition for a tread.