Patents by Inventor Silke Liesert

Silke Liesert 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).

  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Patent number: 6921440
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to: cold rolling of the hot sheet metal with or without preliminary annealing, final annealing of the sheet-metal strip at a temperature of between 800° C. and 1100° C. for a duration of between 1 minute and 5 minutes and preferably at a temperature of about 1050° C. for a time of about 2 minutes. Steel and exhaust manifold.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: July 26, 2005
    Assignee: Ugine SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu
  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Publication number: 20020129877
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to:
    Type: Application
    Filed: March 14, 2002
    Publication date: September 19, 2002
    Applicant: UGINE SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu
  • Niobium-stabilized 14% chromium ferritic steel, and use of same in the automobile sector
    Patent number: 6423159
    Abstract: A process for production of sheet-metal strip of niobium-stabilized 14% chromium ferritic steel, characterized in that certain steel is subjected to: cold rolling of the hot sheet metal with or without preliminary annealing, final annealing of the sheet-metal strip at a temperature of between 800° C. and 1100° C. for a duration of between minute and 5 minutes and preferably at a temperature of about 1050° C. for a time of about 2 minutes. Steel and exhaust manifold.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: July 23, 2002
    Assignee: Ugine SA
    Inventors: Silke Liesert, Laurent Antoni, Pierre Olivier Santacreu