B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
154/104, 117/137
B32B 11/00 (2006.01) D06N 5/00 (2006.01) B32B 31/26 (1990.01)
Patent
CA 2038576
B 1304 PATENT 03/23/90 ABSTRACT A roofing base sheet for application by use of heat to an underlying substrate comprising: (a) a sheet of a flexible material, (b) a layer of a first asphalt composition covering the underside of the sheet, the asphalt composition being liquefiable by the use of heat for application and adherence to the underlying substrate, and (c) a protective covering over the first asphalt composition to prevent its sticking, the protective covering being a pervious material or an impervious material convertible by heat to a pervious condition so that heat applied to the underside of the sheet liquefies the asphalt composition and renders any impervious covering pervious, whereby the liquefied asphalt composition can be directly applied to the underlying substrate.
Barry Leon F.
Klasen Charles J.
Maugel Theodore R.
Barry Leon F.
Celotex Corporation (the)
Gowling Lafleur Henderson Llp
Klasen Charles J.
Maugel Theodore R.
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