A roofing shingle consisting of composite plies of thin sheet material adhered together by asphalt having exposed areas with or without cut outs between tabs, and a flexible region at the end top of the exposed area. The top end of the cut outs may lie in this flexible region.
申请公布号
US4848057(A)
申请公布日期
1989.07.18
申请号
US19840611728
申请日期
1984.05.18
申请人
EXXON RESEARCH AND ENGINEERING COMPANY
发明人
MACDONALD, PETER G.;SPINELLI, GIUSEPPE;KANDALGAONKAR, JAYANT B.
