Patent ID: 9290944
Filing Date: 2016-03-22
CPC Classification: B32B,C04B,E04D,Y10T

Claim Text:
1. A laminated roofing product comprising: a first sheet including a first ceramic base material and a bituminous material; a second sheet adjacent to the first sheet and including a second ceramic base material and a second sheet recycled roofing material, wherein the second sheet has a higher recycled roofing content as compared to the first sheet, wherein the first ceramic base material and the second ceramic base material have a mat weight of at least 25 g/m a parting agent dispensed between the first sheet and the second sheet, the parting agent comprising sand, mica, talc, limestone, slag, or any combination thereof, wherein the parting agent avoids the first sheet from sticking to the second sheet, a third sheet including a third sheet recycled roofing material, wherein the second sheet lies between the first and third sheets; and a fourth sheet including a fourth sheet recycled roofing material, wherein the third sheet lies between the second and fourth sheets, wherein the fourth sheet has a higher recycled roofing content as compared to each of the third and second sheets, and the third sheet has a higher recycled roofing content as compared to the second sheet.