Patents by Inventor Sune Allan Sandqvist

Sune Allan Sandqvist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method of securing a sealing layer to a support
    Patent number: 4074501
    Abstract: A method of making a flat, or nearly flat roof watertight by covering the roof with a sealing layer, particularly a polyvinyl chloride sheet, and securing the sheet to the underlying structure by a number of plates and screws or nails passing through the plates. To provide a watertight and durable joint between the polyvinyl sheet and the plate, a bonding agent is applied on the sheet on the intended points of securement of the plates, and a seal is provided between the screw or nail head and the plate.
    Type: Grant
    Filed: April 20, 1976
    Date of Patent: February 21, 1978
    Inventor: Sune Allan Sandqvist