Patents by Inventor Gustaaf M. W. van de Pol

Gustaaf M. W. van de Pol 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).

  • Patent number: 4837387
    Abstract: The invention relates to supporting fabric, made of practically rightangularly crossing, synthetic yarns and having a width of at least 30 cm, preferably more than 1 m, and a length of at least 3 m, for geotextile uses, such as for bearing one or more layers of sand, gravel, stones, clay, loam, asphalt, mortar or like bulk materials. The fabric has a tensile strength in one or more directions of at least 50 kN/m. The yarns of the fabric are in the form of tapes or threads, the material of the yarn chiefly being formed of polypropylene incorporating a polyester, and preferably polyethylene terephthalate. As determined by the total weight of the yarn, the polypropylene composes 75%-85% of the yarn, by weight, and the polyester composes 15%-25% of the yarn, by weight.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: June 6, 1989
    Assignee: Akzo N.V.
    Inventor: Gustaaf M. W. van de Pol
  • Patent number: 4664957
    Abstract: Flexible (single use) sack for transporting goods, such as bulk goods, having a weight of at least 3000 N. It comprises a fabric woven from polypropylene tapes and/or threads and exhibits a mean strip breaking strength of at least 550 N per 50 mm. Sacks with an improved safe working load which can be more readily handled, are obtained by using tapes or threads comprising a matrix of 75-85% B.W. of polypropylene and 25-15% B.W. of polyester, preferably polyethylene terephthalate. The polyester is preferably present in the form of fibrils.
    Type: Grant
    Filed: July 3, 1985
    Date of Patent: May 12, 1987
    Assignee: Akzo nv
    Inventor: Gustaaf M. W. van de Pol