Patents Examined by Hoffert
  • Method of making roofing plies, including method of applying the same to a roof
    Patent number: 4956199
    Abstract: There is disclosed a method of making a roofing ply by providing a fiberglass mat, feeding the mat through a punching die and punching openings through the surface thereof. The mat is thereafter saturated with melted asphalt at a melting temperature of at least about 450 degrees F to impart an elastic memory to the mat.
    Type: Grant
    Filed: September 7, 1989
    Date of Patent: September 11, 1990
    Inventor: Santo J. Ruisi