Patents by Inventor Yean Demertzis

Yean Demertzis 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).

  • Process and plant for descaling, pickling and finishing passivating stainless steel strips, and strips so obtainable
    Patent number: 7799199
    Abstract: Environment-friendly process for descaling, pickling and finishing/passivating in a continuous, integrated and flexible manner, applicable to any type of stainless steel, regardless of its physical structure, chemical composition and nature of surface oxides to be removed, within a single plant in which the required chemical, electrochemical, mechanical and hydromechanical treatments are carried out, merely diversifying the operative conditions of each treatment according to the stainless steel type to be processed. The process and the plant according to the invention allow elevated reaction rate, excellent surface quality, low energy and chemical reagent consumption and total environmental compatibility. The figure shows the block diagram of an embodiment of the plant according to the invention.
    Type: Grant
    Filed: December 29, 2002
    Date of Patent: September 21, 2010
    Assignees: Centro Sviluppo Materiali S.p.A., Thyssenkrupp Acciai Speciali Terni S.p.A., Henkel KGAA
    Inventors: Alessandro Dulcetti, Stefano Luperi, Gianvincenzo Salamone, Giovanni Vespasiani, Stefano Mantovani, Yean Demertzis
  • Process and plant for descaling, pickling and finishing passivating stainless steel strips, and strips so obtainable
    Publication number: 20060037868
    Abstract: Environment-friendly process for descaling, pickling and finishing/passivating in a continuous, integrated and flexible manner, applicable to any type of stainless steel, regardless of its physical structure, chemical composition and nature of surface oxides to be removed, within a single plant in which the required chemical, electrochemical, mechanical and hydromechanical treatments are carried out, merely diversifying the operative conditions of each treatment according to the stainless steel type to be processed. The process and the plant according to the invention allow elevated reaction rate, excellent surface quality, low energy and chemical reagent consumption and total environmental compatibility. The figure shows the block diagram of an embodiment of the plant according to the invention.
    Type: Application
    Filed: December 29, 2002
    Publication date: February 23, 2006
    Inventors: Alessandro Dulcetti, Stefano Luperi, Gianvincenzo Salamone, Giovanni Vespasiani, Stefano Mantovani, Yean Demertzis
  • Inhibitors of corrosion in high-strength and medium-strength steels
    Patent number: 4986962
    Abstract: A method is disclosed for the inhibition of general corrosion, and of stress corrosion by hydrogen sulfide in manganese and low-alloy, medium-strength and high strength steels, obtained by means of the use of compounds of formula:R.sub.1 --CH.dbd.N--[-(CH.sub.2).sub.n --N.dbd.CH--].sub.m --R.sub.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: January 22, 1991
    Assignee: Eniricerche, S.p.A.
    Inventors: Marco Cesari, Arnaldo Roggero, Luigi Rivola, Yean Demertzis