Patents by Inventor Per A. Billgren

Per A. Billgren 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 of separating a solid and a liquid phase of a mass
    Patent number: 4265700
    Abstract: PCT No. PCT/SE78/00029 Sec. 371 Date May 9, 1979 Sec. 102(e) Date May 9, 1979 PCT Filed Aug. 10, 1978 PCT Pub. No. WO79/00137 PCT Pub. Date Mar. 22, 1979This specification describes a method of separating a fine-grained close-packed solid material from a liquid with which the fine-grained material is saturated. The material may by way of example consist of grindings; metal-containing pickling bath deposits; or metal oxides from metallurgical venturi-filter. The moist mixture (1) is packed in a container (2) which thereafter is closed and heated from underneath. The liquid is evaporated starting from the lower portions in the container and forces liquid from the upper portions towards the surface of the paste-like mixture, wherefrom collected liquid (9) can be removed. Common oil drums can be used as containers.
    Type: Grant
    Filed: May 9, 1979
    Date of Patent: May 5, 1981
    Assignee: Uddeholms Aktiebolag AB
    Inventors: Per A. Billgren, Stig A. Karlsson