Patents by Inventor Anders Erik Lofquist

Anders Erik Lofquist 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).

  • Biofilm carrier for water and waste water purification
    Patent number: 6126829
    Abstract: The invention refers to a carrier element to be used as a carrier for a microbial film in a biological water or waste water purification process in which the carrier elements are kept moving in the water. The surface of the carrier element is partly protected against collision with the surfaces of the other carrier elements. The carrier element has flow passages therethrough and is moreover designed to allow good flow of water therethrough also after a microbial film having been established on the surfaces. The carrier element has a length, width and/or height which exceeds 1.5 cm, and the protected area is larger than 100 m.sup.2 /m.sup.3 of the volume of the carrier element. The cross-sectional area of the passage opening in the boundary surface towards the surroundings of the element comprises at least 35% of the boundary surface towards the surroundings of a homogenous body having the same dimensions.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: October 3, 2000
    Assignee: Kaldnes Miljoteknologi AS
    Inventors: Lars Ake Hans Gunnarsson, Asa Elsa Malmqvist, Thomas Gunnar Welander, Anders Erik Lofquist