Patents by Inventor Ulf Edvardsson

Ulf Edvardsson 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).

  • Device for providing a continuous biological decomposition of minerals and concentrates thereof
    Patent number: 5028398
    Abstract: A lying rotatable drum for continuous biological decomposition which includes at least one transversal partition for dividing the container interior into chambers. The partition has opening to transmit liquid between the chambers. Guide means are also provided.
    Type: Grant
    Filed: April 21, 1989
    Date of Patent: July 2, 1991
    Inventors: Rolf O. Hallberg, Ulf Edvardsson