Patents by Inventor Erling O. Wiig

Erling O. Wiig 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 and material for preparing a surface for winter sports
    Patent number: 4440832
    Abstract: A method is disclosed for preparing a surface for winter sports such as skiing, tobagganing, or sledding. The method includes laying down a first layer of relatively large sodium chloride crystals and permitting these crystals to absorb moisture. A second layer of sodium chloride crystals along with an anti-friction agent is placed atop the first layer after a predetermined period of time. Also disclosed is a material suitable for practicing the method.
    Type: Grant
    Filed: December 14, 1979
    Date of Patent: April 3, 1984
    Inventor: Erling O. Wiig