Patents Assigned to Parker Italiana S.a.s.
  • Protective compositions for steel surfaces and the process for their preparation
    Patent number: 4293349
    Abstract: The invention refers to new compositions for protecting steel surfaces from the oxidizing action of atmosphere.The essential components are: glucosides of pyrogallic and/or allagic acid of molecular weight between 270 and 1200; phosphoric acid, phosphates of bivalent transition metals such as Zn and Mn and nitrates of bivalent metals such as Zn and Mn.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: October 6, 1981
    Assignee: Parker Italiana S.a.s.
    Inventor: Giuseppe Pedrazzini