Patents by Inventor Walter Ronc

Walter Ronc 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: 4199639
    Abstract: Sandwich-structured double layer floor covering with the upper surface layer of fleece made of synthetic polymer fiber of at least 5 mm thickness having, on the upper surface, needle work of with a minimum of 2 million stitches per square meter, and with a lower layer of cellular polyethylene having a maximum density of 35 kilograms per cubic meter and a thickness of at least 5 millimeters. The combination of the two different layers and needling make it particularly suitable as a floor covering for sports-grounds especially with regard to sliding friction on the top surface and the shock-absorption property of the lower layer.
    Type: Grant
    Filed: July 10, 1978
    Date of Patent: April 22, 1980
    Inventor: Walter Ronc