Patents by Inventor Carlos Alberto Leal Pereira Da Silva

Carlos Alberto Leal Pereira Da Silva 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).

  • Process for vacuum packaging of materials
    Patent number: 5887409
    Abstract: A method of packaging a particulate material is provided. The method includes the steps of providing a flexible plastic bag having an opening at one end, placing the bag in a mold which generally takes the form of an open-topped box, introducing the material into the bag through the opening, creating a vacuum in the bag and sealing the bag to close the opening while maintaining the vacuum in the bag.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: March 30, 1999
    Assignee: Van Leer South Africa (Proprietary) Limited
    Inventor: Carlos Alberto Leal Pereira Da Silva