Patents by Inventor Lars L. Stigsson

Lars L. Stigsson 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 stabilizing emulsion explosives
    Patent number: 4602970
    Abstract: Method of stabilizing an emulsion explosive comprising an oxidant, a fuel, and an emulsifier the molecules of which have at least one double-binding. The oxidant is emulsified in the fuel in the presence of the emulsifier, and a polymerizing reaction is effected after the emulsification to bind the molecules of the emulsifier chemically to each other.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: July 29, 1986
    Assignee: Scan Coin S/A
    Inventor: Lars L. Stigsson
  • Coal-water dispersion
    Patent number: 4599089
    Abstract: A storage stable aqueous pulverized-coal dispersion can be pumped and can be burned by conventional techniques. The dispersion comprises stabilizing additives and a coal content which ranges from 60 to 80% by weight. The additives include a combination of (a) sufficient lecithin adsorbed on surfaces of coal particles to provide repulsion between the coal particles by hydration forces and (b) polymer cooperating with the lecithin and comprising at least one polymer having segments of hydrophobic as well as segments of hydrophilic character.
    Type: Grant
    Filed: February 22, 1985
    Date of Patent: July 8, 1986
    Assignee: Fluidcarbon International AB
    Inventors: Lars L. Stigsson, Bjorn Lindman
  • Method for atomizing dispersions or solutions containing particles
    Patent number: 4580723
    Abstract: A method for atomizing dispersions or solutions containing particles wherein the dispersion or solution is discharged from a nozzle. Before it leaves the nozzle it is brought to form a rotating annular film which is exposed to the influence of high-frequency sound for the disintegration of the liquid.
    Type: Grant
    Filed: July 13, 1983
    Date of Patent: April 8, 1986
    Assignee: Fluidcarbon International AB
    Inventor: Lars L. Stigsson