Patents by Inventor Paolo B. Giordani

Paolo B. Giordani 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).

  • Brightening/passivating metal surfaces without hazard from emissions of oxides of nitrogen
    Patent number: 6858097
    Abstract: A chromium- and nitrogen-free brightening and passivating treatment for metal surfaces, particularly iron and steel, comprises: at least one acid; at least one substance containing a peroxy moiety; and at least one organic substance selected from the group consisting of; molecules that contain both at least one ether moiety and at least one hydroxyl moiety; molecules that contain at least two ether moieties; and molecules that contain in each molecule both at least one ether moiety and one nitrogen atom that is covalently bonded to at least three carbon atoms. Preferably part of the acid contains phosphorus, which has been found to act synergistically with the organic substance to stabilize peroxy compounds against decomposition, particularly in the presence of metal ions.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: February 22, 2005
    Assignee: Henkel Kommanditgesellschaft auf Aktien (Henkel KGAA)
    Inventors: Paolo B. Giordani, Valentino Gasparetto, Dario Negri
  • Brightening/passivating metal surfaces without hazard from emissions of oxides of nitrogen
    Publication number: 20030121568
    Abstract: A chromium- and nitrogen-free brightening and passivating treatment for metal surfaces, particularly iron and steel, comprises: at least one acid; at least one substance containing a peroxy moiety; and at least one organic substance selected from the group consisting of: molecules that contain both at least one ether moiety and at least one hydroxyl moiety; molecules that contain at least to ether moieties; and molecules that contain in each molecule both at least one ether moiety and one nitrogen atom that is covalently bonded to at least three carbon atoms. Preferably part of the acid contains phosphorus, which has been found to act synergistically with the organic substance to stabilize peroxy compounds against decomposition, particularly in the presence of metal ions.
    Type: Application
    Filed: June 28, 2002
    Publication date: July 3, 2003
    Inventors: Paolo B. Giordani, Valentino Gasparetto, Dario Negri