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:
Nov. 03, 1998
Filed:
Jun. 17, 1996
Timothy L Hart, Grants Pass, OR (US);
Duro-Last, Inc., Saginaw, MI (US);
Abstract
A roof system comprising a roof substrate with an exposed vertical, rigid drain pipe is covered by a flexible single ply synthetic, plastic cover, with a sandwiched reinforcement fabric, having an opening in alignment with the drain pipes. A patch-shaped piece of the cover material has a drain pipe accommodating opening surrounded by an edge portion perimetrally pressure-heat welded to the cover, the piece having a generally rigid, non-bindable, plastomeric seal ring disc, formed generally of recycled such cover material wherein the reinforcement fabric is disassociated and present in the plastic in the form of randomly dispersed fibres. The disc is only centrally pressure heat-welded to the underside of the piece and has an opening therethrough of substantially the shape and size of the drain pipe. It is the ring disc which is secured to the substrate.