Patents by Inventor Jean-Yves Fran.cedilla.ois Roger Chatellier

Jean-Yves Fran.cedilla.ois Roger Chatellier 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).

  • Non-destructive process for estimating the ageing of an article made of a composite material
    Patent number: 5922957
    Abstract: A non-destructive process for estimating the ageing of an article made of a composite material is described comprising a preliminary phase in which at least one chart is prepared characterizing the change in the attenuation of ultrasonic waves in the composite material as a function of weight loss thereof, and a checking phase in which the attenuation of ultrasonic waves in the article made of the composite material is measured and the weight loss of the article is determined using the chart prepared in the preliminary phase, the weight loss being representative of the ageing of the article.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: July 13, 1999
    Assignee: Societe Nationale d'Etude et de Construction de Moteurs d'Aviation "Snecma"
    Inventors: Jean-Yves Fran.cedilla.ois Roger Chatellier, Jean-Louis Fachinetti