Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2007-05-01
2007-05-01
Yoon, Tae H (Department: 1714)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S495000, C524S496000, C525S333100
Reexamination Certificate
active
10372895
ABSTRACT:
A tread rubber composition improved both in grip performance on ice-covered and snow-covered road surfaces and in abrasion resistance is provided. The tread rubber composition contains aluminum hydroxide having an untamped density of not more than 0.60 g/cm3, a DOP oil absorption of at least 70 cm3/100 g and less than 250 cm3/100 g, and a BET specific surface area of at least 30 m2/g and not more than 350 m2/g in an amount of 5–60 parts by weight with respect to 100 parts by weight of a rubber component containing at least 50% by weight of at least one of polyisoprene rubber and polybutadiene rubber. The tread rubber composition has a tanδ peak temperature of not more than −45° C. and a type A durometer hardness at 0° C. of not more than 64.
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Birch & Stewart Kolasch & Birch, LLP
Sumitomo Rubber Industries Ltd.
Yoon Tae H
LandOfFree
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