Patents by Inventor Friedrich Staschkiewicz

Friedrich Staschkiewicz 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 inhibiting corrosion of aluminum with 2-phosphono-butane-1,2,4-tricarboxylic acid
    Patent number: 4229409
    Abstract: A method of inhibiting the corrosion of aluminum in contact with an alkaline solution comprising adding 2-phosphono-butane-1,2,4-tricarboxylic acid or a water-soluble salt thereof as inhibitor to the alkaline solution.
    Type: Grant
    Filed: November 2, 1978
    Date of Patent: October 21, 1980
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGaA)
    Inventors: Rolf Scharf, Hans-Joachim Schlussler, Friedrich Staschkiewicz