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, 1992
Filed:
Oct. 17, 1990
Applicant:
Inventor:
Daniel L Barksdale, Brownsburg, IN (US);
Assignee:
Bridgestone/Firestone, Inc., Akron, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09J / ; C09J / ;
U.S. Cl.
CPC ...
156157 ; 156314 ; 428 57 ; 428 58 ; 428189 ; 428194 ;
Abstract
A liquid tight seam for an overlapping seam of two waterproof elastomeric membranes of a roof covering and the method of forming the seam. The overlapped edge portions of the two membranes are sealed by an intervening adhesive layer. A second adhesive layer is applied along the seam and covers adjacent exposed areas of the two membranes and stepped edges thereof which form the seam. Next, a bead of sealant is applied along the seam and over adjacent portions of the second adhesive layer. This seam and method eliminates washing and cleaning the seam areas with solvents before applying the sealant thereby enhancing seam quality and strength.