Film-bitumen combination

Details Film-bitumen combination Film-bitumen combination

2003-10-07

2009-11-17

Sample, David R (Department: 1794)

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

C428S040100, C428S040300, C428S041800, C428S489000, C428S192000, C428S189000, C428S060000, C428S058000, C428S077000, C428S078000

Reexamination Certificate

active

07618700

ABSTRACT:
Film-bitumen combination with at least three layers is used in particular as a membrane to cover roof areas. At least two film layers of the combination are made from different materials.

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patent: 2004/0109968 (2004-06-01), Furst
patent: 20019212 (2001-03-01), None

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