Patents by Inventor Jan Hurlen

Jan Hurlen 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).

  • Aluminum electrolysis cell with continuous anode
    Patent number: 5071534
    Abstract: An aluminum electrolysis cell comprises a cathode and a continuous anode disposed above the cathode. The anode is composed of carbon elements which are glued or in some other way connected to one another. Onto the anode, there are added new elements to replace carbon material consumed during the electrolysis process. The anode is divided into sections defined by easily detachable holders or cassettes which are disposed close to one another in a row longitudinally of the cell. The cassettes are each provided at their upper ends with projections designed to be detachably connected to bearer walls or structures along the long sides of the cell.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: December 10, 1991
    Assignee: Norsk Hydro A.S.
    Inventors: Hans K. Holmen, Tormod Naterstad, Jan Hurlen, Sigmund Gjorven
  • Method of reducing the loss of carbon from anodes when producing aluminum by electrolytic smelting, and an inert anode top for performing the method
    Patent number: 4659442
    Abstract: Carbon losses are reduced in that an operative carbon anode is glued beneath a carbon core in an inert anode top. The operative anode carbon is almost completely consumed. The anode top is then cleaned and a new operative carbon is glued to its underside.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: April 21, 1987
    Assignee: .ANG.rdal og Sunndal Verk AS
    Inventors: Tormod Naterstad, Knut Bergli, Jan Hurlen