Patents by Inventor Finn Egeli

Finn Egeli 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).

  • Surface active compound, a microemulsion containing said compound and the use thereof
    Patent number: 4990269
    Abstract: A surface active compound for use in microemulsions useful in oil recovery, wood impregnating, dry cleaning, cleaning of hard surfaces and for floor polishing, which has one hydrophobic group, containing 9-50, preferably 12-35 carbon atoms and 2-6 separate hydrophilic end groups, at least one of the hydrophilic end groups being a nonionic group obtained by reacting a compound having a reactive hydrogen atom with an alkylene oxide having 2-4 carbon atoms and at least one being an anionic group.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: February 5, 1991
    Assignees: Berol Kemi AB, Tendex Kjemi Service A/S
    Inventors: Eva M. Andreasson, Krister A. Holmberg, Borje Nystrom, Eva M. Osterberg, Finn Egeli
  • Acidizing method using microemulsion
    Patent number: 4650000
    Abstract: Formations surrounding oil wells, gas wells, injection wells and similar bore holes are treated by the injection of a microemulsion containing an acid solution. The main surfactant of the microemulsion is characterized by having at least two hydrocarbon groups attached to a nitrogen atom via a polar groups.
    Type: Grant
    Filed: November 6, 1985
    Date of Patent: March 17, 1987
    Assignees: Berol Kemi AB, Tendex Kjemiservice A/S
    Inventors: Eva M. Andreasson, Finn Egeli, Krister A. Holmberg, Borje Nystrom, Kjell G. Stridh, Eva M. sterberg