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B.V. Asphalt-en Chemische Fabrieken Smid and Hollander Patents |
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Assignee: B.V. Asphalt-en Chemische Fabrieken Smid and Hollander
Address: Groningen, NL
No. of patents: 1
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 4874652 |
Perforated roofing material and a method of manufacturing the same |
October 17, 1989 |
| A perforated web-like bituminous roofing material comprising a perforated, bituminized carrier, at the side facing, in the condition of use, the roof area to be coated, is provided with a metal foil leaving clear the perforations in the bituminized carrier. The roofing material can be |
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