Road structure – process – or apparatus – Pavement – Rubber or rubber-like
Reexamination Certificate
2006-09-19
2008-11-18
Parsley, David J (Department: 3643)
Road structure, process, or apparatus
Pavement
Rubber or rubber-like
C404S082000, C052S745060
Reexamination Certificate
active
07452159
ABSTRACT:
A flexible, porous and durable tree well skirt and a sidewalk structure are made of a cushion base of butadiene rubber and a wear layer of ethylene propylene diene monomer (EPDM). The butadiene rubber is mixed with an isocyanate polyurethane binder and spread on the ground around the tree to form the cushion base of the tree well skirt. The EPDM is mixed with an isocyanate polyurethane binder and spread over the cushion base to form the wear layer. The cushion base and wear layer structure used for a sidewalk is spread over a stabilized porous base.
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Alexander Karoleen B.
Parsley David J
LandOfFree
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