Patents by Inventor Birgit T. G. Karlsson

Birgit T. G. Karlsson 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 for the mechanical working of metals and lubricant concentrate
    Patent number: 4384965
    Abstract: During mechanical working, an aqueous lubricant composition is used as a lubricating and cooling agent, which contains an ether phosphate as a lubricating agent. A concentrate suitable for use as a lubricant after dilution with water is also described.
    Type: Grant
    Filed: February 5, 1981
    Date of Patent: May 24, 1983
    Assignee: Berol Kemi AB
    Inventors: Karl M. E. Hellsten, Birgit T. G. Karlsson
  • Hydrocarbon oils containing 1 to 10 percent emulsified water and emulsifiers therefor
    Patent number: 4315755
    Abstract: Hydrocarbon oils containing 1 to 10% emulsified water are provided, having as the emulsifier:(a) a nonionic surface-active ethylene oxide adduct having the general formula: ##STR1## in which: n.sub.1 =1 to 5;n.sub.2 =a number selected to give a polyethylene glycol chain in a weight percent within the range from about 50 to about 60% by weight of the adduct;R=alkyl of from about one to about twenty-four carbon atoms, the alkylphenyl group having from about twelve to about thirty carbon atoms; and(b) the calcium salt of dodecylbenzene sulphonic acid.The weight ratio nonionic surface-active ethylene oxide adduct to calcium salt of dodecylbenzene sulphonic acid is from about 80:20 to about 40:60. The emulsifier emulsifies from 1 to 10% by weight of water in the hydrocarbon oil.
    Type: Grant
    Filed: June 30, 1980
    Date of Patent: February 16, 1982
    Assignee: Berol Kemi A.B.
    Inventors: Karl M. E. Hellsten, Inger G. Johansson, Birgit T. G. Karlsson