Patents by Inventor Louis Jacques Leger

Louis Jacques Leger 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 producing a coating for providing superalloys with highly efficient protection against high-temperature corrosion, a protective coating formed by the process, and articles protected by the coating
    Patent number: 6183888
    Abstract: A process for producing a coating for protecting superalloy articles against high temperature oxidation and hot corrosion comprises forming, on the surface of the article, a first deposit of an agglomerated powdered alloy containing at least chromium, aluminum and an active element, and filling the open pores of the powder deposit by a second, electrolytically applied, deposit of a precious platinum group metal. An appropriate thermal treatment is then carried out to effect interdiffusion between the powder based deposit and the electrolytic deposit and produce a coating including chromium, an active element such as yttrium, and a precious platinum group metal throughout its thickness.
    Type: Grant
    Filed: December 11, 1997
    Date of Patent: February 6, 2001
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation “SNECMA”
    Inventors: Alexandre Serge Alperine, Jean-Paul Fournes, Louis Jacques Leger