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:
May. 18, 2021
Filed:
May. 20, 2019
Sumitomo Rubber Industries, Ltd., Hyogo, JP;
Tatsuhiro Tanaka, Kobe, JP;
SUMITOMO RUBBER INDUSTRIES, LTD., Hyogo, JP;
Abstract
Provided are a tread rubber composition that provides a balanced improvement of fuel economy, fracture strength, and abrasion resistance, and a pneumatic tire including the rubber composition. The present invention relates to a tread rubber composition including: a rubber component; a silica having a nitrogen adsorption specific surface area of 220 m/g or more; and a mercapto silane coupling agent, the tread rubber composition satisfying the following relationship (A):()*(4%)−*(64%)≤150[]wherein G*(4%) is the shear modulus at an applied strain of 4% at 100° C., and G*(64%) is the shear modulus at an applied strain of 64% at 100° C.