The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 28, 1986
Filed:
Oct. 01, 1984
V Robert Canfield, Martinsville, NJ (US);
William J Woodring, Bound Brook, NJ (US);
Mira C Kubiak, North Brunswick, NJ (US);
GAF Corporation, Wayne, NJ (US);
Abstract
Lighter weight, high strength, built-up roofing (BUR) membranes, systems and process for obtaining same are provided herein. These BUR membranes are made by using an improved ply sheet having uniform ventability and attachment in the overall assembly and superior resistance to wind uplift. The improved structure involves a ply sheet carrying 1/8 inch diameter or larger perforations along its longitudinal border in an area comprising between 1/5 and about 1/2 the width of the ply sheet. The ply sheets here employed for the BUR assembly or membrane have a thickness essentially not in excess of the layer of bonding agent applied over each ply in the assembly.