Patents by Inventor Roger Kieger

Roger Kieger 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 for refining phosphoric pig iron
    Patent number: 4643766
    Abstract: An improved two phase basic steel refining process for phosphoric pig iron is described which comprises forming a steel having a phosphorus content of not greater than 0.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: February 17, 1987
    Assignees: 501 Societe Lorraine de Laminage & Continu -Sollac-, 502 Unimetal
    Inventor: Roger Kieger
  • Method of injecting a powder containing carbon into a metal bath
    Patent number: 4045213
    Abstract: In a method of deoxidizing and/or carburizing a metal, particularly steel, bath using an immersed nozzle consisting of two concentric tubes, the central tube of the nozzle is fed with an oxidizing gas during the or each oxidation phase, then with a scavenging gas, then with a neutral gas carrying carbon powder or powder containing carbon during the or each deoxidation or carburization phase and finally with a scavenging gas, the outer tube of the nozzle being fed with a protective fluid or different protective fluids during both the oxidation and deoxidation or carburization phases.
    Type: Grant
    Filed: January 27, 1977
    Date of Patent: August 30, 1977
    Assignees: Creusot-Loire, Societe Lorraine de Laminage Continu-Sollac
    Inventors: Pierre Leroy, Jean Bastien, Jean-Claude Muller, Roger Kieger