Patents by Inventor Ivar Rivenaes

Ivar Rivenaes 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).

  • Aqueous solutions especially for cleaning high strength steel
    Patent number: 5275671
    Abstract: There are provided improved aqueous chemical cleaning compositions for removing organic and inorganic combustion residues from steel products, said compositions meeting the hydrogen embrittlement potential test criteria set forth in ANSI/ASTM F 519-77. These compositions are of particular utility in cleaning gas turbines in the motoring and running modes. The compositions comprise ethoxylated amines, ethylene diamine tetra acetic acid and demineralized water having a conductivity of or below 0.9 microhms. The composition has important application for the aviation and outer-space industries.
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: January 4, 1994
    Inventor: Ivar Rivenaes
  • Aqueous solutions especially for cleaning high strength steel
    Patent number: 5075040
    Abstract: There are provided improved aqueous chemical cleaning compositions for removing organic and inorganic combustion residues from steel products, said compositions meeting the hydrogen embrittlement potential test criteria set forth in ANSI/ASTM F 519-77. These compositions are of particular utility in cleaning gas turbines in the motoring and running modes. The compositions comprise ethoxylated amines, ethylene diamine tetra acetic acid and demineralized water having a conductivity of or below 0.9 micro mhos. The composition has important application for the aviation and outer-space industries.
    Type: Grant
    Filed: November 7, 1988
    Date of Patent: December 24, 1991
    Assignee: Denbar, Ltd.
    Inventor: Ivar Rivenaes