Patents by Inventor Nils Davidsson

Nils Davidsson 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).

  • Lubricating suspension for pumping concrete
    Patent number: 5318408
    Abstract: A method for the start up of a concrete pump using a small amount of an aqueous suspension of polymers, amorphous silicone dioxide and water-reducer rather than a conventional cement slurry.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: June 7, 1994
    Assignee: Sika AG, vorm. Kaspar Winkler & Co.
    Inventor: Nils Davidsson