Patents by Inventor Hans A. L. Berglund

Hans A. L. Berglund 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 for producing granulate sodium tripolyphosphate of low bulk density
    Patent number: 4556525
    Abstract: The present invention relates to a method for producing lightweight granules of sodium tripolyphosphate from a powderous sodium-phosphate mixture. The material is first processed in the schugi-mixer, while adding a given quantity of water thereto, whereafter the moist mixture is fed to a rotating calcining furnace, to which the given, remaining quantity of water is supplied to the material prior to calcination.
    Type: Grant
    Filed: May 8, 1984
    Date of Patent: December 3, 1985
    Assignee: Boliden Aktiebolag
    Inventor: Hans A. L. Berglund
  • Method of purifying phosphoric acid of heavy metals
    Patent number: 4378340
    Abstract: The present invention relates to a process for removing heavy metals, particularly cadmium, from differing qualities of wet-process phosphoric acids. The invention is based on the concept of removing the heavy metals in sulfide form.
    Type: Grant
    Filed: January 10, 1981
    Date of Patent: March 29, 1983
    Assignee: Boliden Aktiebolag
    Inventor: Hans A. L. Berglund