Patents by Inventor Per Fidjest.o slashed.l

Per Fidjest.o slashed.l 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).

  • Cement based injection grout
    Patent number: 5769939
    Abstract: The present invention relates to a cement-based injection grout containing microcement and water for consolidation and/or waterproofing fine granular soils, finally fissured soils and cracks in rocks or concrete structures. In addition to microcement and water the grout contains amorphous silica particles in an amount of 5-70% based on the weight of cement and 0-10% water-reducing agents based on the weight of the cement, said grout having a weight ratio between water and cement+amorphous silica between 2 and 8.
    Type: Grant
    Filed: June 4, 1997
    Date of Patent: June 23, 1998
    Assignee: Elkem ASA
    Inventors: Eldar O. Dings.o slashed.yr, Per Fidjest.o slashed.l, Oddny J.o slashed.rgensen