Patents by Inventor Lars E. H. Persson

Lars E. H. Persson 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).

  • Crystallization of polyaluminium hydroxide complexes
    Patent number: 4559220
    Abstract: The present invention relates to a method for producing a polyaluminium hydroxide complex of a chloride and sulphate type in solid form, an aqueous solution of the polyaluminium hydroxide complex being admixed with at least one water-miscible organic solvent having 1-4 C, the weight ratio of the aqueous solution to the solvent being at least 1:0.70, preferably 1:1-2, to crystallize the complex.The method provides a highly stable, amorphous crystalline product.
    Type: Grant
    Filed: November 17, 1983
    Date of Patent: December 17, 1985
    Assignee: Boliden Aktiebolag
    Inventors: Eric N. F. Kullenberg, Gertrud M. Lindahl, Lars E. H. Persson