Patents by Inventor Hans K. Johnsen

Hans K. Johnsen 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).

  • Apparatus for testing of fluids
    Patent number: 4888981
    Abstract: Apparatus for testing fluids, especially for testing physical characteristics or susceptibility to process fluids. A rotor (11) includes at least one arced pipe segment (18-21) that can transport the fluid, which is to be tested, and retrieve it during rotation. The pipe segment or segments are preferably connected by adjacent valves.
    Type: Grant
    Filed: December 11, 1985
    Date of Patent: December 26, 1989
    Inventors: Edgar Johansen, Hans K. Johnsen
  • Slurry for cementing, especially cementing of lining pipes in drill holes, and method for production of such a slurry
    Patent number: 4650520
    Abstract: A slurry is disclosed which contains a hardening mixture of water and cement, especially for cementing lining pipes into drilling holes. The slurry comprises a first slurry component comprising a dispersion of a hardening cement slurry in a liquid capable of forming an encapsulating membrane, and a second slurry component comprising a hardenable cement containing mixture. By mixing the first and second slurry components, there is formed a dispersion of membrane encapsulated cement particles in a cement slurry.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: March 17, 1987
    Inventors: Hans K. Johnsen, Knut Gaaseidnes