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. 13, 1987
Filed:
Aug. 31, 1984
Eiichi Tajima, Tokyo, JP;
Kaname Yamamoto, Tokyo, JP;
Tajima Roofing Co., Ltd., Tokyo, JP;
Abstract
A laminated bituminous roofing membrane including: (i) a fibrous sheet; (ii) a first bituminous layer laminated on one surface of the fibrous sheet, the bituminous layer being composed of bitumen or a bituminous mixture; (iii) a synthetic resin sheet or film laminated on the other surface, opposite to the surface laminated to the fibrous sheet, of the first bituminous layer; (iv) a second bituminous layer laminated on the other surface of the fibrous sheet, the bituminous layer being composed of bitumen or a bituminous mixture; and (v) a mineral aggregate layer deposited on the opposite surface of the second bituminous layer. This laminated bituminous roofing membrane can be readily and directly applied in a cold-application process on a substrate to form a waterproofing layer in which the joint portions of adjacent roofing membranes are completely water-tightly bonded and the formation of blistering and deterioration due to the presence of moisture or water from the substrate is prevented.