Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Patent
1982-10-08
1983-08-02
Van Balen, William J.
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
523098, 428150, 428160, 4283184, 4283191, 428468, 428626, E04D 335, E04D 1102, B32B 516, B32B 518
Patent
active
043966861
ABSTRACT:
A roofing element for roofs of civil and industrial buildings comprising a layer of expanded polyurethane having high thermal insulation capacity, a support made of zinc-plated sheet steel overlying said layer of expanded polyurethane and adhering thereto at all points, a thin layer of a bituminous compound and a continuous layer of stone material in fine scales caused to adhere to said thin layer of bituminous compound.
REFERENCES:
patent: 2073334 (1937-03-01), Coffman
patent: 3535198 (1970-10-01), Bloom
patent: 4122203 (1978-10-01), Stahl
patent: 4206267 (1980-06-01), Jungbluth
patent: 4351873 (1982-09-01), Davis
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