Bituminous covering material and method of making
United States Patent 2721146

Inventors:
Hardman, Harley F.
Publication Date:
10/18/1955
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Assignee:
STANDARD OIL CO
Primary Class:
428/491
Other Classes:
106/271, 427/417, 208/23, 106/273.100, 106/281.100
International Classes:
D06N5/00; D21H17/61; D21H17/00
US Patent References:
2481370Bitumen coated surface and method of making
2555401Roofing and the manufacture thereof
2581685
Foreign References:
GB598180A