Patents by Inventor Benjamin Vis

Benjamin Vis 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 for vacuum-packaging finely divided materials, and a bag for implementing the method
    Patent number: 4683702
    Abstract: A method for vacuum-packaging a powdered material comprises providing a first gas-impermeable sheet, a second gas-impermeable sheet, and a gas-permeable sheet, the three sheets being substantially rectangular in shape and the gas-permeable sheet having smaller dimensions than the gas-impermeable sheets, the gas-permeable sheet being impermeable to the powdered material. The gas-permeable sheet is positioned on the first gas-impermeable sheet such that the latter peripherally overlaps the former; and one edge of the gas-permeable sheet is sealed to the corresponding edge of the gas-impermeable sheet. The second gas-impermeable sheet is positioned on the opposite side of the gas-permeable sheet such that the former similarly peripherally overlaps the latter. The three sheets are sealed together along their opposed edges respectively perpendicular to the first sealed edge.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: August 4, 1987
    Assignee: U.S. Philips Corporation
    Inventor: Benjamin Vis